Files 2868 53#
acura — 2
alfa romeo — 8
amc — 26
audi — 4 — 2#
bmw - mini — 22 — 4#
buick — 43
cadillac — 7
— Northstar — 3
chevy — 597 — 1#
&n1111 — lsx — 220
— ltx — 79
— 4.3l v6 — 9
— ecotec — 4
chevy_big_block — 363
— 409 — 14
chrysler — 7
— jeep — 13
— neon — 8
— viper - v10 — 14
— la — 120
— hemi — 29
chrysler_big_block
— rb — 125
— early hemi — 9 — 1#
— hemi — 41
citroen — 0 — 2#
ferrari — 11
fiat — 2
ford — 34 — 18#
— v6 3.5 3.7 ecoboost — 2
— v6 3.8 — 7
— cleveland — 39
— modular — 55
— windsor — 275
ford_big_block
— fe — 39 — 1#
— 385 series — 120 — 1#
gmc - v6 — 2
gm_duramax_diesel — 3
holden — 8
honda — 34
hyundai — 7
jaguar — 1
lotus — 0 — 1#
mazda — 12
mercedes — 6
mgb — 4
mitsubishi — 20 — 2#
nissan — 20
olds — 37
opel / vaux — 23 — 4#
peugeot — 1
pontiac — 112 — 1#
— 3800 v6 — 10
porsche — 10
renault — 4
rover — 2 — 2#
studebaker — 9
subaru — 15 — 2#
toyota — 40
volvo — 16 — 2#
vw — 34 — 9#
———————
buell — 4
harley-davidson — 63
honda — 1
jawa — 1
kawasaki — 4
kohler — 1
suzuki — 7
triumph — 1
yamaha — 4

275 2v/3v Intake Files — 38#

# - DFW Only Numbers
38 2v/3v Intake Files

Check out these Screenshots from our Automotive Performance Software.

Offering A Computer Program designed for the Motor Sports enthusiast since 1987.
Performance software that does the math for YOU.

DFW or FLW Files
A Package of more than 2825 flow files for use with Dyno simulation programs.
I have formatted each cylinder heads information into individual files for use with different versions of DeskTop Dyno, DynoSim, Comp Cams CamQuest program, Dynomation Versions 4 and 5 and Performance Trends Engine Analyzer. The files will be in separate folders for the different engine types. See tree view to left. Download a Sample DFW File for Dynamation 5.0 (.5KB) or a Sample DFW File for Camquest 6.0 (.5KB) or a Sample FLW File (.5KB) or a Sample DFW File for Performance Trends Engine Analyzer v3.9 (.5KB) to see which of these files will work with your simulation software.
Price $34.95 - Add $5.95 for shipping and handling if you want a CD-ROM. Online Purchasing
If you would like to order DFW or FLW Files. Please download and email me the Order Form. Or for information Email Stan

Our Combination Package Pay Regular Price for

and get 33% OFF on FLW /DFW files.
Price $73.25 - Add $5.95 for shipping and handling if you want a CD-ROM. Online Purchasing

Cylinder Head Flow Data at 28 Inches of Water

You can search this page by using your browser's EDIT —> FIND commands

[Acura] [Alfa Romeo] [AMC] [Audi] [BMW] [Buick] [Cadillac] [Chevy] [BB Chevy] [Chrysler] [BB Chrysler] [Citroen] [Cummins] [Ferrari] [Fiat] [Ford] [BB Ford] [GMC] [GM Duramax Diesel] [Holden] [Honda] [Hyundai] [Jaguar] [Lotus] [Mazda] [Mercedes] [MGB] [Mitsubishi] [Nissan] [Olds] [Opel / Vauxhall] [Peugeot] [Pontiac] [Porsche] [Renault] [Rover] [Saab] [Studebaker] [Subaru] [Toyota] [Volvo] [VW] ——— [Buell] [Harley-Davidson] [Honda] [Jawa] [Kawasaki] [Kohler] [KTM] [Rotax] [Suzuki] [Triumph] [Yamaha] ——— [IH]
Peak Horse Power

These numbers have come from various magazines, web sites, manufactures catalogs, and ???
We have tried to verify the accuracy of these numbers but use at your own risk!

ALL Volume numbers are in CCs. — ALL Flow numbers are in CFM.

Bigger is not always better (The highest flow numbers and/or largest port volume). — Flow Velocity or the speed of the air through the port is just as important.
We want the best flow numbers with the smallest port volume and the highest velocity (up to a point).
Remember to compare all flow numbers. — Low lift flow does help performance.
Just looking at flow numbers near or above maximum Valve lift for your camshaft is meaningless. Look for the best average flow from mid-lift to just before maximum lift of your camshaft.
For street engines airflow at 0.400-inch lift is a good place to evaluate flow.
Two heads can have different cc's in port volume and still have the same average CSA because of their different port centerline lengths.

Valve Size Column —
One reason numbers may vary is valve size, and / or Bore Fixture Size. — If I have the Bore Fixture Size it will be line 2 in the valve size column.
One reason exhaust numbers vary is if one person attached an Exhaust Tube/Pipe, if I have this information it will be line 3 in the valve size column. The increase from a pipe will vary from head to head but at higher lifts in normally in the 4 to 7 percent range.
Valve Lift Column —
Check the exhaust / intake flow ratio (percentage). If present this will be the second line in the cell.
Check the CFM per Square Inch of valve area calculations that are necessary when comparing the flow results of different size valves. The CFM flow per Square Inch of Intake valve area, if present this will be the third line in the cell. The CFM flow per Square Inch of exhaust valve area, if present will follow. Note: these numbers are program generated and use 1 intake and 1 exhaust valve per cylinders it will generate bad data if the engine has more than one intake or exhaust valve cylinder. Some engines have had an override added to make them come out correctly ex. Modular - FORD 3v and 4v. If you find a listing where I do not have an override or the override is wrong Please let me know.
Check the port velocity at the throat area for the Intake port. If present this will be the 4th line in the cell. The port velocity of the exhaust, if present will follow. The throat (CSA) Cross-Sectional Area is calculated using 90% of the valve diameter with nothing removed for valve stem area. Note: these numbers are program generated and use 1 intake and 1 exhaust valve per cylinders it will generate bad data if the engine has more than one intake or exhaust valve cylinder. Some engines have had an override added to make them come out correctly ex. Modular - FORD 3v and 4v. If you find a listing where I do not have an override or the override is wrong Please let me know.
Check the Valve / Curtain Area Discharge Coefficient for the Intake port. If present this will be the 5th line in the cell. The Valve / Curtain Area Discharge Coefficient of the Exhaust, if present will follow. Note: these numbers are program generated and use 1 intake and 1 exhaust valve per cylinders it will generate bad data if the engine has more than one intake or exhaust valve cylinder. Some engines have had an override added to make them come out correctly ex. Modular - FORD 3v and 4v. If you find a listing where I do not have an override or the override is wrong Please let me know.
We show a Maximum Horse Power number calculated using 3 different formulas. Line 1 uses one from AFR as show in a number of magazines that will call high performance street, line 2 uses a comp type formula and line 3 uses almost a Pro Stock type. Note: this number is program generated and uses 8 cylinders it will generate bad data if the engine is other than an 8 cylinder Most engines have had an override added to make them come out correctly ex. Harley-Davidson. If you find a listing where I do not have an override or the override is wrong Please let me know.
NOTE: DO TO TABLE SIZE I NO LONG SHOW HP
Average Column —
When calculating the average number, flow at .100-inch lift is not used. This will be line 1.
When calculating the average exhaust / intake ratio (percentage) there needs to be more than 2 flow numbers, and the number of intake and exhaust count must be equal. If present this will be line 2.
When calculating the CFM flow per cc of intake or exhaust port volume only the highest intake or exhaust flow number is used. If present this will be line 3.
Valve Lift at which the Throat Area and Window / Curtain Area are the SAME SIZE. If present this will be line 4. The Throat (CSA) Cross-Sectional Area is calculated using 90% of the valve diameter with nothing removed for valve stem area.
How are heads that have a good and a bad port handled? -- The flow numbers for the 2 ports are averaged and this number is used in the calculations.
For a supercharged, or nitrous you will need a higher intake exhaust ratio (percentage).
Use these numbers only as a rough guide.
Remember when doing a comparison to other tables check at what pressure differential were they flowed?
There is a calculator on my Home Page to convert flow numbers from one pressure differential to another.

Where do MOST of the numbers come from?

Most flow numbers for Advanced Induction heads come from their Web Site updated Aug. '12.
Most flow numbers for AFR — Air Flow Research heads come from their Web Site or '05/'12/'13 Catalog, updated March '13.
All flow numbers for AJPE — Alan Johnson Performance Engineering heads come from their Web Site updated Dec. '08.
All flow numbers for Alaniz Cylinder Heads come from their Web Site updated Dec. '08.
No flow numbers for ALL PRO Aluminum Cylinder Heads come from their Web Site updated Aug. '12.
All flow numbers for /Andre' Norrback heads come from /Andre' Norrback their Web Site updated Feb. '12.
Most flow numbers for Avenger Cylinder Heads come from their Web Site updated Aug. '09.
Most flow numbers for BENNETT heads come from their Web Site updated Oct. '08.
Most flow numbers for BES Racing Engines heads come from their Web Site updated March '12.
All flow numbers for BHPerformance Ported heads come from BHPerformance updated Jan. '05.
All flow numbers for Bill Jones heads were from Bill Jones, updated May '13 — most were converted from 25" to 28".
Most flow numbers for BJR Racing Engines & Heads come from BJR Racing their Web Site updated Jan. '11
Most flow numbers for British Automotive - MGB heads come from their Web Site updated May '07 — and were converted from 10" to 28".
All flow numbers for Bob Legere Ported heads came from him Updated March '09 — and were converted from 10" to 28".
Most flow numbers for BMF heads come from their Web Site updated Aug. '09.
Most flow numbers for BRODIX heads come from their '98/'04/'06/'08 Catalogs. Some from their Web Site updated Aug. '12.
All flow numbers for Bullet Cylinder Heads come from their Web Site updated Dec. '09.
All flow numbers for CAROBU Engineering heads come from CAROBU Engineering Web Site updated Jan. '11.
Most flow numbers for CCH — Canadian Cylinder Head Technologies heads come from their Web Site updated Oct. '08 — and were converted from 25" to 28".
Some flow numbers for Chad Speier Heads come from their Web Site updated Nov. '12.
Most flow numbers for Chapman Racing Heads come from their Web Site updated Oct. '08.
Most flow numbers for CHI — Cylinder Head Innovations heads come from their Web Site updated Aug. '09.
Most flow numbers for CHR Motorsports LLC heads were from CHR Motorsports or their Web Site updated Aug. '09.
All flow numbers for CHW — Cylinder Head Works heads come from them Web Site updated April '10.
All flow numbers for CNC Heads UK come from their Web Site. Updated July '10 — and were converted from 10" to 28".
Most flow numbers for DART heads were from DART or their Web Site updated Aug. '12.
All flow numbers for Darin Morgan heads come from Darin Morgan Web Site updated Oct. '12.
All flow numbers for David Vizard heads come from Web Site updated April '08.
All flow numbers for DRD Racing Heads come from their Web Site updated Aug. '09.
All flow numbers for Dr J's Performance heads come from their Web Site updated Jan. '13.
Most flow numbers for EDELBROCK heads come from their Web Site updated July '11.
Most flow numbers for ET Performance heads come from their Web Site updated Aug. '09.
All flow numbers for FLO Headworks Ported heads come from their Web Site. Updated June '07 — and were converted from 10" to 28".
All flow numbers for Flowtech - Steven Magnotti Ported heads come from them Contact updated Aug. '09.
All flow numbers for For Hemis Only Ported heads come from their Web Site updated March '13.
Most flow numbers for Fox Lake Ported heads come from their Web Site updated May '13.
Most flow numbers for Foxwell Motorsports heads come from them Web Site updated June '12.
Most flow numbers for Gamrace heads come from their Web Site updated Aug. '09.
Most flow numbers for HRD Ported heads come from their Web Site updated June '09.
Most flow numbers for Hot Heads heads come from their Web Site updated Dec. '08.
Most flow numbers for INDY heads come from their Web Site updated Oct '12.
All flow numbers for JG Engine Dynamics heads come from their Web Site updated Nov. '08.
Most flow numbers for JM Cylinder Heads come from their Web Site updated Aug. '09.
All flow numbers for Kelford Cams heads come from Kelford Cams or their Web Site updated Oct. '08.
All flow numbers for Kendrick Auto heads come from Kelford Cams or their Web Site updated July '09.
All flow numbers for KRE — Kauffman Racing Equipment Ported heads were from them or come from their Web Site updated May '07.
Most flow numbers for Lingenfelter Cylinder Heads come from their Web Site updated Dec. '08.
Some flow numbers for Livernois Motorsports Ported heads come from their Web Site updated June '09.
Most flow numbers for M2 Race Systems heads come from their Web Site updated Aug. '09.
Most flow numbers for MBE LLC heads were from MBE LLC or their Web Site updated Aug. '09.
All flow numbers for Meaux Racing heads were from Meaux Racing, their Web Site updated May '13.
The flow numbers for Modern Cylinder Head were from a number of different sources, their Web Site updated Nov. '08.
All flow numbers for MORGO Systems come from them Updated Jan. '12 — and were converted from 10" to 28".
All flow numbers for NPS — Nordic Porting Service come from Marko Pirkonen their Web Site Updated April '12
Most flow numbers for Patriot Performance heads come from their Web Site updated May '10.
Most flow numbers for PowerHeads come from their Web Site updated Aug. '09.
Most flow numbers for Pro Comp heads come from their Web Site updated Dec. '08.
All flow numbers for RFD — Race Flow Development heads come from RFD, their Web Site updated July '11.
All flow numbers for Reher Morrison Racing Engines heads come from their Web Site updated May '07.
All flow numbers for RHS — Racing Head Service heads come from their Web Site updated Feb. '12.
All flow numbers for Ron's Porting Service heads come from their Web Site updated Aug. '12.
All flow numbers for Sabre Heads come from their Web Site. Updated Aug. '12 — and were converted from 10" to 28".
Most flow numbers for Scott Johnston heads come from them Web Site updated July '09.
All flow numbers for SD Performance heads come from their Web Site updated Jan. '13.
All flow numbers for Shady Dell Speed Shop heads come from their Web Site updated Dec. '08.
Most flow numbers for Shanons Engineering heads come from their Web Site updated May '07.
Some flow numbers for Slick Rick Racing Heads - Naiser Racing Components Heads come from Ricky McConathy, their Web Site updated Nov. '11.
Most flow numbers for Smithberg Racing heads come from their Web Site updated Feb. '13.
Most flow numbers for Sonny's Racing Engines, Inc. heads come from their Web Site updated Aug. '12.
All flow numbers for Super Six Motorsports heads come from their Web Site updated March '13.
Most flow numbers for TEA — Total Engine Airflow heads come from their Web Site updated Aug. '12.
Most flow numbers for Trick Flow heads come from their Catalog. Web Site updated Jan. '13.
All flow numbers for TRI-Mark Performance Heads come from their Web Site updated Oct. '10.
All flow numbers for Weingartner Racing heads come from Weingartner Racing or their Web Site updated Jan. '13. Brez = A Brezenski Fixture was used.
Most flow numbers for West Coast (WCCH) heads come from West Coast their Web Site updated March '13.
Some flow numbers for Wolfplace - Lewis Racing Engines heads come from their Web Site updated March '13.
Most flow numbers for World Castings heads come from their Web Site updated Dec. '11.
CCM - Means these numbers come from Car Craft Magazine Web Site.
CHP - Means these numbers come from Chevy High Performance Magazine Web Site.
HPMM - Means these numbers come from High Performance Mopar Magazine Web Site.
HPP - Means these numbers come from High Performance Pontiac Magazine Web Site.
HRM - Means these numbers come from Hot Rod Magazine
MMM - Means these numbers come from Mopar Muscle Magazine Web Site.
MMFF - Means these numbers come from Muscle Mustangs & Fast Fords Magazine Web Site.
5.0 S/F - Means these numbers come from 5.0 Mustang & Super Fords Magazine Web Site.

Cylinder Head Flow Data Table

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.150

.200

.250

.300

.350

.400

.450

.500

.550

.600

Average

1.8l Type R CCH

N/A

33mm/ 28mm

N/A

262/207
79%
98.8/108
293/321
.489/.455

-
-
-
.263/.223

1.8l Type R Ported CCH

N/A

33mm/ 28mm

N/A

299/242
80.9%
113/127
334/376
.558/.532

-
-
-
.263/.223

GSR Alaniz Cyl Heads

N/A

33mm/ 28mm

N/A

77/-

123/-

154/-
58.1
172
.646

174/-
65.6
194
.584

194/-
73.2
217
.543

215/-
81.1
240
.515

232/-
87.5
259
.487

245/-
92.4
274
.457

256/-
96.6
286
.43

199
-
-
.263/.223

GSR Ported Alaniz Cyl Heads

N/A

75/-

117/-

151/-
-

179/-
-

209/-
-

236/-
-

256/-
-

271/-
-

279/-
-

212

GSR Ported WAT Porflow

N/A

33mm/ 28mm
81mm

N/A

84/70
83.3%

119/111
93.3%

150/150
100%
56.6/78.6
168/233
.629/.742

183/176
96.2%
69/92.2
205/273
.614/.696

213/188
88.3%
80.3/98.5
238/292
.596/.62

237/195
82.3%
89.4/102
265/303
.568/.551

255/197
77.3%
96.2/103
285/306
.535/.487

267/198
74.2%
101/104
298/307
.498/.435

280/203
72.5%
106/106
313/315
.47/.401

213/177
83.2%
-
.263/.223

1.8l GSR CCH

N/A

33mm/ 28mm

N/A

250/189
75.6%
94.3/99
279/293
.466/.415

-
-
-
.263/.223

1.8l GSR Ported CCH

N/A

33mm/ 28mm

N/A

290/234
80.7%
109/123
324/363
.541/.514

-
-
-
.263/.223

RSX-S Alaniz Cyl Heads

N/A

35mm/ 30mm

N/A

83/-

130/-

173/-
58
172
.684

208/-
69.7
207
.658

234/-
78.5
232
.617

254/-
85.2
252
.574

269/-
90.2
267
.532

280/-
93.9
278
.492

285/-
95.6
283
.451

229
-
-
.279/.239

RSX Ported CHR Motorsports LLC Home Made Bench

N/A

35mm/ 30mm
-
Radius on Exhaust

N/A

95/113
118%

131/148
113%

162/175
108%
54.3/79.9
161/237
.641/.808

192/200
104%
64.4/91.3
191/270
.608/.738

213/213
100%
71.4/97.2
212/288
.562/.655

234/226
96.6%
78.5/103
232/306
.529/.596

251/232
92.4%
84.2/106
249/314
.496/.535

264/237
89.8%
88.5/108
262/320
.464/.486

277/241
87%
92.9/110
275/326
.438/.445

286/244
85.3%
95.9/111
284/330
.411/.409

293/245
83.6%
98.2/112
291/331
.386/.377

230/216
93.8%
-
.279/.239

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

1mm

2mm

3mm

4mm

6mm

8mm

10mm

11mm

12mm

13mm

14mm

15mm

16mm

Average

2.0l Jim K

N/A

44mm/40mm

N/A

18/18
100%

42/42
100%

64/62
96.9%
27.2/31.8
80.5/94.3
.682/.727

78/75
96.2%
33.1/38.5
98.1/114
.623/.659

110/89
80.9%
46.7/45.7
138/135
.586/.522

133/99
74.4%
56.4/50.8
167/151
.531/.435

144/105
72.9%
61.1/53.9
181/160
.46/.369

147/107
72.8%
62.4/54.9
185/163
.427/.342

149/109
73.2%
63.2/56
187/166
.397/.319

151/110
72.8%
64.1/56.5
190/167
.371/.298

113/88.7
78.4%
-
.351/.319

2.0l Jim K Exhaust Ported

N/A

44mm/40mm

N/A

18/20
111%

42/42
100%

64/64
100%
27.2/32.9
80.5/97.4
.682/.75

78/75
96.2%
33.1/38.5
98.1/114
.623/.659

110/92
83.6%
46.7/47.2
138/140
.586/.539

133/107
80.5%
56.4/54.9
167/163
.531/.47

144/117
81.3%
61.1/60.1
181/178
.46/.411

147/120
81.6%
62.4/61.6
185/183
.427/.384

149/124
83.2%
63.2/63.7
187/189
.397/.363

151/125
82.8%
64.1/64.2
190/190
.371/.338

113/96.2
85.1%
-
.351/.319

2.0l Jim K 1mmOS Valves

N/A

45mm/41mm

N/A

18/18
100%

42/42
100%

64/62
96.9%
26/30.3
76.9/89.8
.667/.709

84/84
100%
34.1/41
101/122
.656/.72

122/110
90.2%
49.5/53.8
147/159
.636/.629

149/119
79.9%
60.4/58.2
179/172
.582/.51

164/122
74.4%
66.5/59.6
197/177
.513/.419

171/124
72.5%
69.4/60.6
206/180
.486/.387

172/124
72.1%
69.8/60.6
207/180
.448/.355

174/124
71.3%
70.6/60.6
209/180
.418/.327

127/101
79.8%
-
.359/.327

2.0l Ported Stage 2 Jim K

N/A

46mm/38mm

N/A

20/17
85%

44/35
79.5%

64/52
81.3%
24.8/29.6
73.6/87.6
.652/.642

84/67
79.8%
32.6/38.1
96.6/113
.642/.62

124/97
78.2%
48.1/55.2
143/163
.632/.598

154/110
71.4%
59.8/62.6
177/185
.589/.509

177/119
67.2%
68.7/67.7
204/201
.541/.44

184/122
66.3%
71.4/69.4
212/206
.511/.411

189/124
65.6%
73.4/70.5
217/209
.482/.382

192/125
65.1%
74.5/71.1
221/211
.452/.356

135/94.6
70.2%
-
.367/.303

2.0l Ported Stage 3 Jim K

N/A

46mm/38mm

N/A

20/17
85%

45/35
77.8%

67/52
77.6%
26/29.6
77.1/87.6
.683/.642

89/67
75.3%
34.6/38.1
102/113
.68/.62

136/97
71.3%
52.8/55.2
156/163
.693/.598

172/110
64%
66.8/62.6
198/185
.657/.509

192/119
62%
74.5/67.7
221/201
.587/.44

197/122
61.9%
76.5/69.4
227/206
.548/.411

201/124
61.7%
78/70.5
231/209
.512/.382

201/125
62.2%
78/71.1
231/211
.473/.356

144/94.6
65.5%
-
.367/.303

155 TS Ported Andreas Engstr”m welded and epoxi

N/A

47mm/38mm
84mm
Pipe

N/A

28/25
89.3%

50/43
86%

66/66
100%
24.5/37.5
72.7/111
.658/.814

87/87
100%
32.4/49.5
95.9/147
.651/.805

132/126
95.5%
49.1/71.7
145/212
.658/.777

177/155
87.6%
65.8/88.2
195/261
.662/.717

213/166
77.9%
79.2/94.4
235/280
.637/.614

225/167
74.2%
83.7/95
248/281
.612/.562

228/167
73.2%
84.8/95
251/281
.569/.515

232/169
72.8%
86.3/96.1
256/285
.534/.481

235/170
72.3%
87.4/96.7
259/287
.502/.449

237/171
72.2%
88.1/97.3
261/288
.473/.422

238/172
72.3%
88.5/97.8
262/290
.445/.398

177/138
78.3%
-
.375/.303

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.150

.200

.250

.300

.350

.400

.450

.500

.550

Average

'72 2.0l

N/A

44mm/40mm

N/A

48/42
87.5%

93/78
83.9%
39.5/40
117/119
.585/.54

131/97
74%
55.6/49.8
165/148
.55/.448

150/100
66.7%
63.6/51.3
189/152
.472/.346

153/99
64.7%
64.9/50.8
192/151
.428/.305

158/97
61.4%
67/49.8
199/148
.398/.269

122/85.5
70%
-
.351/.319

'72 2.0l +1mm Valves

N/A

45mm/41mm

N/A

53/49
92.5%

110/79
71.8%
44.6/38.6
132/114
.677/.534

143/98
68.5%
58/47.9
172/142
.587/.441

165/104
63%
66.9/50.8
198/151
.508/.351

171/104
60.8%
69.4/50.8
206/151
.468/.312

176/104
59.1%
71.4/50.8
212/151
.433/.281

136/89.7
65.8%
-
.359/.327

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

AMC 090 '73 Ken Parkman SF110 Iron

N/A

2.025/1.625

74/56
75.7%

156/112
71.8%

201/141
70.1%
62.4/68
185/201
.721/.631

219/149
68%
68/71.8
201/213
.589/.50

226/149
65.9%
70.2/71.8
208/213
.487/.40

232/150
64.7%
72/72.3
213/214
.416/.335

238/151
63.4%
73.9/72.8
219/216
.366/.289

212/142
67%
-
.410/.329

AMC 090 74Bubblefender Iron

N/A

2.025/1.625

N/A

74/56
75.7%

156/112
71.8%

201/141
70.1%
62.4/68
185/201
.721/.631

219/145
66.2%
68/69.9
201/207
.589/.486

226/149
65.9%
70.2/71.8
208/213
.487/.40

232/150
64.7%
72/72.3
213/214
.416/.335

207/139
67.4%
-
.410/.329

AMC 090 Ported 74Bubblefender Iron

N/A

2.025/1.625

N/A

85/53
62.4%

160/103
64.4%

210/142
67.6%
65.2/68.5
193/203
.754/.635

225/163
72.4%
69.9/78.6
207/233
.606/.547

230/169
73.5%
71.4/81.5
212/241
.495/.453

238/175
73.5%
73.9/84.4
219/250
.427/.391

213/150
70.7%
-
.410/.329

AMC 291 Iron

173/73

2.025/1.625

N/A

225/155
68.9%
69.9/74.7
207/221
.484/.416

-
-
1.30/2.12
.410/.329

AMC 291 '70 Ken Parkman SF110 Iron

N/A

2.025/1.625
-
No Pipe

71/55
77.5%

127/107
84.3%

179/135
75.4%
55.6/65.1
165/193
.642/.604

209/142
67.9%
64.9/68.5
192/203
.563/.476

217/145
66.8%
67.4/69.9
200/207
.467/.389

222/145
65.3%
68.9/69.9
204/207
.398/.324

228/145
63.6%
70.8/69.9
210/207
.351/.278

197/137
69.3%
-
.410/.329

AMC 291 Bowl Intake Ported Exhaust Iron

N/A

2.055/1.65
-
Pipe

N/A

67/50
74.6%

138/108
78.3%

193/153
79.3%
58.2/71.6
172/212
.683/.674

236/178
75.4%
71.2/83.2
211/247
.626/.588

257/220
85.6%
77.5/103
230/305
.545/.581

257/227
88.3%
77.5/106
230/315
.454/.50

257/230
89.5%
77.5/108
230/319
.39/.434

223/186
83.4%
-
.416/.334

AMC 291-C '70 390 '71 401 74Bubblefender Iron

N/A

2.025/1.625

138/101
73.2%

185/137
74.1%
57.4/66.1
170/196
.664/.613

212/152
71.7%
65.8/73.3
195/217
.571/.51

214/154
72%
66.4/74.3
197/220
.461/.413

219/-
68
201
.393

194/136
-
-
.410/.329

AMC 291-C Ported John Iron

N/A

-
-
No Pipe

N/A

90/57
63.3%

148/115
77.7%

200/147
73.5%
-

241/192
79.7%
-

273/206
75.5%
-

293/210
71.7%
-

300/211
70.3%
-

308/-
-

252/180

AMC 475 '78-'85 74Bubblefender Iron

N/A

2.025/1.625

142/107
75.4%

186/137
73.7%
57.8/66.1
171/196
.668/.613

204/143
70.1%
63.3/69
188/204
.549/.48

209/144
68.9%
64.9/69.4
192/206
.45/.386

214/-
66.4
197
.384

191/133
-
-
.410/.329

AMC 502 '74-'77 74Bubblefender Iron

N/A

2.025/1.625

59.2

144/114
79.2%

188/132
70.2%
58.4/63.6
173/189
.675/.59

204/140
68.6%
63.3/67.5
188/200
.549/.47

212/144
67.9%
65.8/69.4
195/206
.456/.386

216/-
67.1
199
.388

193/133
-
-
.410/.329

AMC 502 '74 Ken Parkman SF110 Iron

N/A

2.025/1.625

70/59
84.3%

143/113
79%

192/146
76%
59.6/70.4
177/209
.689/.653

213/150
70.4%
66.1/72.3
196/214
.573/.503

220/152
69.1%
68.3/73.3
202/217
.474/.408

228/153
67.1%
70.8/73.8
210/219
.409/.342

236/153
64.8%
73.3/73.8
217/219
.363/.293

205/145
70.4%
-
.410/.329

AMC SS Iron

N/A

2.08/1.66

N/A

264/-
77.7
230
.461

-
-
-
.421/.336

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

AMC SS 558 Ken Parkman Iron

N/A

2.08/1.66
-
No Pipe

N/A

70/57
81.4%

154/100
64.9%

206/129
62.6%
60.6/59.6
180/177
.72/.565

242/146
60.3%
71.2/67.5
211/200
.634/.479

239/152
63.6%
70.3/70.2
208/208
.501/.399

246/159
64.6%
72.4/73.5
215/218
.43/.348

248/167
67.3%
73/77.2
216/229
.371/.313

223/142
63.9%
-
.421/.336

AMC SS 558 Ken Parkman Iron

N/A

2.08/1.66
-
Pipe

N/A

70/58
82.9%

154/107
69.5%

206/142
68.9%
60.6/65.6
180/194
.72/.622

242/161
66.5%
71.2/74.4
211/220
.634/.529

239/172
72%
70.3/79.5
208/235
.501/.452

246/181
73.6%
72.4/83.6
215/248
.43/.396

248/190
76.6%
73/87.8
216/260
.371/.356

223/159
71.4%
-
.421/.336

AMC Iron Ported Payton

N/A

2.08/1.625

270/200
74.1%
79.5/96.4
235/286
.404/.383

-
-
-
.421/.329

Edelbrock Performer 60119, 60139 SF1020 Alum

185/70

2.02/1.60

65/52
80%

130/96
73.8%

192/127
66.1%
59.9/63.2
178/187
.691/.577

235/163
69.4%
73.3/81.1
217/240
.634/.555

258/182
70.5%
80.5/90.5
239/268
.557/.496

260/190
73.1%
81.1/94.5
240/280
.468/.431

215/152
70.5%
1.41/2.71
.409/.324

Edelbrock Performer RPM 60109 Alum

185/70

2.02/1.60
4.15

252/162
64.3%
78.6/80.6
233/239
.544/.441

-
-
1.36/2.31
.409/.324

Edelbrock Ported 74Bubblefender Alum

N/A

2.02/1.60

134/106
79.1%

182/145
79.7%
56.8/72.1
168/214
.655/.659

244/176
72.1%
76.1/87.5
226/259
.658/.60

270/200
74.1%
84.3/99.5
250/295
.583/.545

274/212
77.4%
85.5/105
253/312
.493/.481

221/168
76%
-
.409/.324

Edelbrock Ported 74Bubblefender Alum

N/A

2.08/1.60

143/113
79%

202/149
73.8%
59.4/74.1
176/220
.706/.677

254/181
71.3%
74.8/90
221/267
.666/.617

278/201
72.3%
81.8/100
242/296
.583/.548

286/214
74.8%
84.2/106
249/315
.50/.486

296/-
87.1
258
.443

243/172
-
-
.421/.324

Edelbrock Performer 401 Ported Meaux Racing SF600 Alum

N/A

2.02/1.60
4.00
No Pipe

N/A

130/97
74.6%

192/135
70.3%
59.9/67.1
178/199
.691/.613

241/179
74.3%
75.2/89
223/264
.65/.61

268/203
75.7%
83.6/101
248/299
.579/.553

282/213
75.5%
88/106
261/314
.507/.484

223/165
74.3%
-
.409/.324

Indy 401SR

235/105

2.10/1.65

136/101
74.3%

194/137
70.6%
56/64.1
166/190
.671/.603

237/162
68.4%
68.4/75.8
203/224
.615/.535

265/173
65.3%
76.5/80.9
227/240
.55/.457

275/177
64.4%
79.4/82.8
235/245
.476/.39

281/180
64.1%
81.1/84.2
240/249
.417/.34

231/155
67%
1.20/1.71
.425/.334

Indy 401-SR Alum

235/105

2.10/1.65

136/123
90.4%

195/159
81.5%
56.3/74.4
167/220
.675/.70

233/178
76.4%
67.3/83.2
199/247
.605/.588

259/186
71.8%
74.8/87
222/258
.538/.492

272/191
70.2%
78.5/89.3
233/265
.471/.421

272/192
70.6%
78.5/89.8
233/266
.403/.362

228/172
75.3%
1.16/1.83
.425/.334

Indy 401-SR Full Porting Alum

N/A

2.10/1.65

N/A

141/123
87.2%

204/155
76%
58.9/72.5
175/215
.706/.683

253/181
71.5%
73/84.6
216/251
.657/.598

287/207
72.1%
82.9/96.8
246/287
.596/.547

311/225
72.3%
89.8/105
266/312
.538/.496

322/237
73.6%
93/111
275/328
.478/.447

253/188
74.3%
-
.425/.334

Indy 401-SR Ported Alfano Perfermance Alum

N/A

2.10/1.65

N/A

65/55
84.6%

139/113
81.3%

200/151
75.5%
57.7/70.6
171/209
.692/.665

250/186
74.4%
72.2/87
214/258
.649/.614

290/208
71.7%
83.7/97.3
248/288
.602/.55

313/225
71.9%
90.4/105
268/312
.542/.496

323/238
73.7%
93.3/111
276/330
.479/.449

326/250
76.7%
94.1/117
279/346
.423/.413

263/196
74.5%
-
.425/.334

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

Indy 401-SR Ported Garland Perfermance Alum

N/A

2.10/1.65

N/A

80/54
67.5%

160/115
71.9%

228/170
74.6%
65.8/79.5
195/236
.789/.749

283/216
76.3%
81.7/101
242/299
.735/.714

322/239
74.2%
93/112
275/331
.669/.632

340/257
75.6%
98.2/120
291/356
.588/.566

346/270
78%
99.9/126
296/374
.513/.51

349/280
80.2%
101/131
299/388
.453/.462

290/221
76.3%
-
.425/.334

Indy 401-SR Ported Alum

N/A

2.10/1.65

N/A

80/54
67.5%

160/115
71.9%

228/170
74.6%
65.8/79.5
195/236
.789/.749

283/216
76.3%
81.7/101
242/299
.735/.714

322/239
74.2%
93/112
275/331
.669/.632

341/257
75.4%
98.5/120
292/356
.59/.566

350/270
77.1%
101/126
299/374
.519/.51

358/280
78.2%
103/131
306/388
.465/.462

292/221
75.8%
-
.425/.334

Indy 401-1 Alum

245/110

2.19/1.81

128/94
73.4%

185/131
70.8%
49.1/50.9
146/151
.614/.526

230/161
70%
61.1/62.6
181/185
.572/.485

268/181
67.5%
71.1/70.3
211/208
.534/.436

294/194
66%
78/75.4
231/223
.488/.389

304/202
66.4%
80.7/78.5
239/233
.432/.348

235/161
68.3%
1.24/1.84
.443/.367

Indy 401-1 Alum

245/110

2.19/1.81

139/114
82%

195/147
75.4%
51.8/57.1
153/169
.647/.59

241/172
71.4%
64/66.8
190/198
.60/.518

272/189
69.5%
72.2/73.5
214/218
.542/.455

288/197
68.4%
76.5/76.6
227/227
.478/.395

288/205
71.2%
76.5/79.7
227/236
.41/.353

237/171
72%
1.18/1.86
.443/.367

Indy 401-1 Full Porting Alum

275/125

2.19/1.81

N/A

147/120
81.6%

208/158
76%
55.2/61.4
164/182
.69/.634

257/186
72.4%
68.2/72.3
202/214
.64/.56

297/207
69.7%
78.8/80.4
234/238
.591/.499

329/224
68.1%
87.3/87.1
259/258
.546/.45

354/238
67.2%
94/92.5
278/274
.503/.41

265/189
71.2%
1.29/1.90
.443/.367

Indy 401-1 CNC Alum

300/134

2.25/1.81

239/175
73.2%
60.1/68
178/202
.772/.703

298/214
71.8%
74.9/83.2
222/246
.722/.644

349/254
72.8%
87.8/98.7
260/292
.676/.612

376/274
72.9%
94.6/106
280/316
.607/.55

388/285
73.5%
97.6/111
289/328
.537/.49

390/287
73.6%
98.1/112
291/330
.472/.432

340/248
73%
1.30/2.14
.456/.367

Indy 401-1 Ported RadAMX Alum

N/A

2.19/1.81
-
No Pipe

N/A

54/60
111%

131/112
85.5%

197/153
77.7%
52.3/59.5
155/176
.654/.614

253/185
73.1%
67.2/71.9
199/213
.63/.557

299/211
70.6%
79.4/82
235/243
.595/.508

340/234
68.8%
90.3/90.9
267/269
.564/.47

360/249
69.2%
95.6/96.8
283/287
.512/.428

-/259

263/191
72.4%
-
.443/.367

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.050

.100

.150

.200

.250

.300

.350

.380

.400

.450

.500

.550

.600

.650

Average

1.8l T 20 V Small Port CCH

N/A

26.9mm/ 29.9mm

N/A

177/171
96.6%
67/78.6
198/233
.32/.417

-
-
-
.214/.238

1.8l T 20 V Small Port Ported CCH

N/A

26.9mm/ 29.9mm

N/A

238/202
84.9%
90.1/92.8
267/275
.43/.492

-
-
-
.214/.238

1.8l T 20 V Large Port CCH

N/A

26.9mm/ 29.9mm

N/A

212/195
92%
80.2/89.6
238/265
.383/.475

-
-
-
.214/.238

1.8l T 20 V Large Port Ported CCH

N/A

26.9mm/ 29.9mm

N/A

257/224
87.2%
97.2/103
288/305
.464/.546

-
-
-
.214/.238

1.8l T 20V CNC HEADS UK

N/A

26.9mm/ 29.9mm
100mm
No Pipe

N/A

53/-

102/89
87.3%

142/-
53.7
159
.65

178/134
75.3%
67.4/61.6
200/182
.611/.62

205/-
77.6
230
.563

222/161
72.5%
84/74
249/219
.508/.497

231/-
87.4
259
.453

239/176
73.6%
90.4/80.9
268/240
.41/.407

245/182
74.3%
92.7/83.6
275/248
.374/.375

196/148
-
-
.214/.238

1.8l T 20V Ported CNC HEADS UK

N/A

26.9mm/ 29.9mm
100mm
No Pipe

N/A

48/-

96/83
86.5%

139/-
52.6
156
.636

179/146
81.6%
67.7/67.1
201/199
.614/.676

208/-
78.7
233
.571

228/193
84.6%
86.3/88.7
256/263
.522/.596

242/-
91.6
271
.474

250/223
89.2%
94.6/102
280/304
.429/.516

256/-
96.9
287
.39

255/250
98%
96.5/115
286/340
.35/.463

206/179
-
-
.214/.238

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

1mm

2mm

3mm

4mm

5mm

6mm

7mm

8mm

9mm

10mm

11mm

12mm

13mm

14mm

Average

S2 2.2l 20V Stock NPS

N/A

32mm/ 28mm
82mm
No Pipe

N/A

56/49
87.5%

107/94
87.9%
42.9/49.2
127/146
.588/.59

156/119
76.3%
62.6/62.3
185/185
.571/.498

181/125
69.1%
72.6/65.5
215/194
.497/.392

191/128
67%
76.6/67.1
227/199
.42/.322

193/130
67.4%
77.4/68.1
229/202
.353/.272

147/108
73%
-
.255/.223

A7 2.3l MORGO Systems

N/A

32mm/ 29.5mm
-
Pipe

N/A

35/25
71.4%

61/49
80.3%

81/71
87.7%
32.5/33.5
96.3/99.3
.593/.564

106/91
85.8%
42.5/42.9
126/127
.582/.542

134/115
85.8%
53.7/54.3
159/161
.589/.548

157/128
81.5%
63/60.4
187/179
.575/.509

175/131
74.9%
70.2/61.8
208/183
.549/.446

185/135
73%
74.2/63.7
220/189
.508/.402

193/138
71.5%
77.4/65.1
229/193
.471/.366

199/140
70.4%
79.8/66.1
236/196
.437/.334

202/142
70.3%
81/67
240/199
.404/.308

203/143
70.4%
81.4/67.5
241/200
.372/.284

206/145
70.4%
82.6/68.4
245/203
.348/.266

159/119
75.1%
-
.255/.235

A7 2.3l Ported MORGO Systems

N/A

32mm/ 29.5mm
-
Pipe

N/A

33/32
97%

64/67
104%

94/94
100%
37.7/44.4
112/131
.689/.747

125/115
92%
50.1/54.3
149/161
.687/.685

154/131
85.1%
61.8/61.8
183/183
.677/.625

180/147
81.7%
72.2/69.4
214/206
.659/.584

197/157
79.7%
79/74.1
234/220
.619/.535

211/166
78.7%
84.6/78.3
251/232
.58/.495

223/170
76.2%
89.4/80.2
265/238
.545/.45

239/176
73.6%
95.9/83.1
284/246
.525/.42

240/180
75%
96.3/85
285/252
.48/.39

246/182
74%
98.7/85.9
292/255
.451/.362

250/185
74%
100/87.3
297/259
.423/.339

185/148
79.6%
-
.255/.235

2.5l Wv T4 MORGO Systems

N/A

Stock
-
Pipe

N/A

32/-

49/-

67/-
-

83/-
-

100/-
-

109/-
-

117/-
-

125/-
-

130/-
-

134/-
-

139/-
-

143/-
-

146/-
-

112

2.5l Wv T4 Ported MORGO Systems

N/A

Stock
-
Pipe

N/A

33/-

54/-

74/-
-

93/-
-

110/-
-

124/-
-

135/-
-

140/-
-

146/-
-

150/-
-

157/-
-

163/-
-

166/-
-

126

2.5l V6 MORGO Systems

N/A

27mm/ 24mm
-
Pipe

N/A

28/24
85.7%

54/50
92.6%

78/74
94.9%
43.9/52.8
130/156
.677/.723

100/95
95%
56.3/67.7
167/201
.651/.696

116/106
91.4%
65.4/75.6
194/224
.604/.621

120/110
91.7%
67.6/78.4
200/232
.521/.537

126/111
88.1%
71/79.1
210/235
.469/.465

128/112
87.5%
72.1/79.9
214/237
.417/.41

128/113
88.3%
72.1/80.6
214/239
.37/.368

129/113
87.6%
72.7/80.6
215/239
.336/.331

131/113
86.3%
73.8/80.6
219/239
.31/.301

133/114
85.7%
74.9/81.3
222/241
.289/.278

135/114
84.4%
76.1/81.3
225/241
.27/.257

115/102
88.9%
-
.215/.191

2.5l V6 Ported MORGO Systems

N/A

27mm/ 24mm
-
Pipe

N/A

-/27

-/53

-79

-/106

-/123

-/131

-/132

-/134

-/135

-/136

-/137

-
-
-
.215/.191

4.2l V8 MORGO Systems

N/A

Stock
-
Pipe

N/A

32/-

58/-

80/-
-

104/-
-

129/-
-

149/-
-

166/-
-

180/-
-

191/-
-

199/-
-

202/-
-

203/-
-

155

4.2l V8 Ported MORGO Systems

N/A

Stock
-
Pipe

N/A

32/-

61/-

90/-
-

119/-
-

148/-
-

172/-
-

189/-
-

198/-
-

208-

215/-
.050%
-

.050%
-

222/-
-

226/-
-

229/-
-

164/.050

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.050

.100

.150

.200

.250

.300

.350

.400

.450

.500

.550

.600

.700

Average

Mini A Series Sabre Heads

N/A

33.2mm/ 29.4mm
-
No Pipe

N/A

19/16
84.2%

38/33
86.8%

56/45
80.4%
41.7/42.8
124/127
.623/.565

72/53
73.6%
53.7/50.4
159/149
.60/.499

82/58
70.7%
61.1/55.1
181/163
.547/.437

89/63
70.8%
66.3/59.9
197/177
.495/.396

95/67
70.5%
70.8/63.7
210/189
.453/.361

101/69
68.3%
75.3/65.6
223/194
.421/.325

102/72
70.6%
76/68.4
225/203
.378/.301

79.4/57.5
72.4%
-
.265/.234

Mini A Series Ported Sabre Heads Offset Guides

N/A

36.7mm/ 32mm
-
No Pipe

N/A

22/18
81.8%

46/38
82.6%

66/65
98.5%
40.3/52.1
119/154
.664/.75

78/68
87.2%
47.6/54.5
141/162
.588/.588

100/78
78%
61/62.6
181/185
.604/.54

110/88
80%
67.1/70.6
199/209
.553/.508

116/95
81.9%
70.7/76.2
210/226
.50/.47

121/104
86%
73.8/83.4
219/247
.456/.45

121/108
89.3%
73.8/86.6
219/257
.406/.415

123/110
89.4%
75/88.2
222/261
.371/.381

97.9/83.8
85.6%
-
.293/.255

M5 CNC Heads UK

N/A

1.374/1.198
100mm
Pipe

N/A

42/-

86/74
86%

133/-
44.8
133
.703

182/150
82.4%
61.4/66.5
182/197
.722/.682

221/-
74.5
221
.701

245/177
72.2%
82.6/78.5
245/233
.648/.537

255/-
86
255
.578

262/185
70.6%
88.4/82.1
262/243
.52/.421

268/-
90.4
268
.473

271/189
69.7%
91.4/83.8
271/248
.43/.344

214/155
-
-
.278/.243

M5 Ported CNC Heads UK

N/A

1.374/1.198
100mm
Pipe

N/A

42/-

89/73
82%

134/-
45.2
134
.709

175/159
90.9%
59/70.5
175/209
.694/.723

212/-
71.5
212
.673

239/193
80.8%
80.6/85.6
239/254
.632/.585

263/-
88.7
263
.596

278/208
74.8%
93.7/92.3
278/273
.551/.473

288/-
97.1
288
.508

292/208
71.2%
98.5/92.3
292/273
.463/.379

295/-
99.5
295
.426

227/168
-
-
.278/.243

EVO 3

N/A

37mm/ 32mm

N/A

92/77
83.7%

185/165
89.2%
55.5/66.2
164/196
.692/.714

248/213
85.9%
74.4/85.4
220/253
.619/.614

264/225
85.2%
79.2/90.2
235/267
.494/.487

268/228
85.1%
80.4/91.4
238/271
.446/.438

273/231
84.6%
81.9/92.7
243/275
.409/.40

222/190
85.6%
-
.295/.255

Mini Cooper S CHR Motorsports LLC Home Made Bench

N/A

30.25mm/ 23.25mm
-
Radius on Exhaust

N/A

33/31
93.9%

66/51
77.3%

98/77
78.6%
44/58.5
130/173
.598/.611

127/98
77.2%
57/74.5
169/221
.581/.584

153/106
69.3%
68.7/80.5
203/239
.56/.505

169/111
65.7%
75.9/84.3
225/250
.516/.441

174/113
64.9%
78.1/85.9
231/254
.455/.384

176/115
65.3%
79/87.4
234/259
.403/.342

175/116
66.3%
78.5/88.1
233/261
.356/.307

142/98.4
69.2%
-
.241/.185

Mini Cooper S CHR Motorsports LLC Home Made Bench

N/A

31.25mm/ 24.25mm
-
Radius on Exhaust

N/A

83/45
54.2%

136/107
78.7%
57.2/74.7
169/221
.603/.611

160/120
75%
67.3/83.8
199/248
.567/.548

179/127
70.9%
75.3/88.7
223/263
.529/.483

182/130
71.4%
76.5/90.8
227/269
.461/.424

191/132
69.1%
80.3/92.2
238/273
.423/.377

193/133
68.9%
81.2/92.9
241/275
.38/.337

161/113
70.6%
-
.249/.193

Mini Cooper S Ported CHR Motorsports LLC Home Made Bench

N/A

31.25mm/ 24.25mm
-
Radius on Exhaust

N/A

55/35
63.6%

111/69
62.2%

144/102
70.8%
60.6/71.2
179/211
.851/.776

173/129
74.6%
72.8/90.1
216/267
.766/.736

200/149
74.5%
84.1/104
249/308
.709/.681

213/164
77%
89.6/115
265/339
.629/.624

221/172
77.8%
92.9/120
275/356
.559/.561

232/173
74.6%
97.6/121
289/358
.514/.494

236/174
73.7%
99.3/122
294/360
.465/.441

191/142
74%
-
.249/.193

Mini Cooper S Ported CHR Motorsports LLC Home Made Bench

N/A

31.25mm/ 24.5mm
-
Radius on Exhaust

N/A

55/42
76.4%

111/80
72.1%

144/123
85.4%
60.6/84.2
179/249
.851/.927

173/151
87.3%
72.8/103
216/306
.766/.853

200/161
80.5%
84.1/110
249/326
.709/.728

213/165
77.5%
89.6/113
265/335
.629/.622

221/170
76.9%
92.9/116
275/345
.559/.549

232/172
74.1%
97.6/118
289/349
.514/.486

236/173
73.3%
99.3/118
294/351
.465/.434

191/149
78.1%
-
.249/.195

Mini Cooper S Madness

N/A

30.25mm/ 23.25mm

N/A

32/30
93.8%

69/69
100%

103/93
90.3%
46.2/70.7
137/209
.629/.738

136/104
76.5%
61/79
181/234
.622/.619

163/108
66.3%
73.2/82.1
217/243
.597/.514

178/110
61.8%
79.9/83.6
237/248
.543/.437

178/111
62.4%
79.9/84.3
237/250
.466/.378

179/111
62%
80.3/84.3
238/250
.41/.33

144/101
70.2%
-
.241/.185

Mini Cooper S Ported Madness Stage 1

N/A

30.25mm/ 24.5mm

N/A

38/37
97.4%

75/70
93.3%

109/107
98.2%
48.9/73.2
145/217
.665/.806

143/134
93.7%
64.2/91.7
190/272
.654/.757

175/142
81.1%
78.5/97.2
233/288
.641/.642

198/144
72.7%
88.9/98.5
263/292
.604/.542

211/145
68.7%
94.7/99.2
281/294
.552/.468

217/145
66.8%
97.4/99.2
289/294
.497/.41

161/127
78.6%
-
.241/.195

Mini Cooper S Ported Madness Stage 2

N/A

31.5mm/ 24.5mm

N/A

36/32
88.9%

73/61
83.6%

110/91
82.7%
45.5/62.3
135/184
.645/.686

145/122
84.1%
60/83.5
178/247
.637/.689

178/152
85.4%
73.7/104
218/308
.626/.687

213/161
75.6%
88.2/110
261/326
.624/.607

224/164
73.2%
92.7/112
275/332
.563/.53

230/165
71.7%
95.2/113
282/335
.505/.466

168/131
78.1%
-
.251/.195

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.050

.100

.150

.200

.250

.300

.350

.400

.450

.500

.550

.600

.700

Average

Mini Cooper S '01-06 M2 Race Systems

98/54

30.2mm/ 23.25mm
3.285

37/26
70.3%

71/61
85.9%

103/86
83.5%
46.4/65.3
137/194
.63/.683

136/98
72.1%
61.2/74.5
181/221
.623/.584

165/102
61.8%
74.3/77.5
220/230
.605/.486

182/104
57.1%
82/79
243/234
.556/.413

184/105
57.1%
82.9/79.8
246/236
.482/.357

185/105
56.8%
83.3/79.8
247/236
.424/.313

147/94.4
64.4%
1.89/1.94
.241/.185

Mini Cooper S '01-06 CNC M2 Race Systems

114/69

30.2mm/ 23.25mm
3.285

38/27
71.1%

75/58
77.3%

112/86
76.8%
50.4/65.3
149/194
.685/.683

146/111
76%
65.7/84.3
195/250
.669/.661

173/140
80.9%
77.9/106
231/315
.634/.667

192/158
82.3%
86.5/120
256/356
.587/.627

209/172
82.3%
94.1/131
279/387
.547/.585

221/175
79.2%
99.5/133
295/394
.507/.521

230/176
76.5%
104/134
307/396
.469/.466

170/135
79.2%
2.02/2.55
.241/.185

Mini Cooper S '01-06 CNC M2 Race Systems 1mmOS Valves

114/69

31.2mm/ 24.25mm
3.285

41/28
68.3%

80/64
80%

118/99
83.9%
49.8/69.1
148/205
.698/.754

155/126
81.3%
65.4/88
194/261
.688/.719

180/150
83.3%
75.9/105
225/310
.639/.685

196/162
82.7%
82.7/113
245/335
.58/.617

210/172
81.9%
88.6/120
263/356
.532/.561

224/176
78.6%
94.5/123
280/364
.497/.502

234/177
75.6%
98.7/124
293/366
.461/.449

175/141
80.6%
2.05/2.57
.249/.193

Mini Cooper S Ported Cosworth Stage 1

N/A

31.25mm/ 24.25

N/A

35/30
85.7%

74/54
73%

107/81
75.7%
45/56.6
133/168
.632/.617

138/102
73.9%
58/71.2
172/211
.611/.582

165/118
71.5%
69.4/82.4
206/244
.585/.539

186/128
68.8%
78.2/89.4
232/265
.549/.487

201/134
66.7%
84.5/93.6
250/277
.509/.437

210/137
65.2%
88.3/95.7
262/284
.465/.391

154/108
69.8%
-
.249/.193

Mini Cooper S Ported JCW

N/A

34/29
85.3%

72/58
80.6%

105/86
81.9%
-

137/117
85.4%
-

165/124
75.2%
-

182/128
70.3%
-

189/129
68.3%
-

186/130
69.9%
-

148/110
74.5%

Mini SOHC Sabre Heads

N/A

30.2mm/ 23.3mm
77mm
No Pipe

N/A

34/26
76.5%

70/56
80%

107/79
73.8%
48.2/59.8
143/177
.654/.626

140/98
70%
63/74.1
187/220
.642/.582

166/105
63.3%
74.8/79.4
221/235
.609/.499

180/108
60%
81.1/81.7
240/242
.55/.428

181/108
59.7%
81.5/81.7
242/242
.474/.367

186/108
58.1%
83.8/81.7
248/242
.426/.321

188/109
58%
84.7/82.5
251/244
.383/.288

188/109
58%
84.7/82.5
251/244
.345/.259

156/97.8
62.6%
-
.241/.186

Mini SOHC Ported Sabre Heads

N/A

30.2mm/ 23.3mm
77mm
No Pipe

N/A

35/27
77.1%

70/66
94.3%

105/106
101%
47.3/80.2
140/238
.642/.84

139/126
90.6%
62.6/95.3
185/282
.637/.749

170/129
75.9%
76.6/97.6
227/289
.623/.613

190/131
68.9%
85.6/99.1
254/294
.581/.519

200/132
66%
90.1/99.9
267/296
.524/.448

205/132
64.4%
92.3/99.9
274/296
.47/.392

210/133
63.3%
94.6/101
280/298
.428/.351

212/134
63.2%
95.5/101
283/300
.389/.318

167/121
72.6%
-
.241/.186

Mini CNC Heads UK

N/A

30.2mm/ 23.33mm
100mm
No Pipe

N/A

35/-

71/56
78.9%

105/-
47.3
140
.642

142/100
70.4%
63.9/75.5
189/224
.651/.593

171/-
77
228
.627

189/109
57.7%
85.1/82.3
252/244
.578/.431

193/-
86.9
258
.506

196/110
56.1%
88.3/83
262/246
.449/.326

197/-
88.7
263
.401

-/110

158/93.8
-
-
.241/.186

Mini Ported CNC Heads UK

N/A

30.2mm/ 23.33mm
100mm
No Pipe

N/A

36/-

72/66
91.7%

107/-
48.2
143
.654

145/148
102%
65.3/112
193/331
.665/.878

176/-
79.3
235
.645

200/170
85%
90.1/128
267/380
.611/.673

215/-
96.8
287
.563

225/174
77.3%
101/131
300/389
.516/.516

230/-
104
307
.469

233/174
74.7%
105/131
311/389
.427/.413

178/146
-
-
.241/.186

M20 325 1705885 Digger

N/A

42mm/36mm

N/A

55/44
80%

110/89
80.9%
51.2/56.4
152/167
.725/.685

155/115
74.2%
72.2/72.9
214/216
.681/.59

181/124
68.5%
84.3/78.6
250/233
.597/.477

181/127
70.2%
84.3/80.5
250/239
.477/.391

186/127
68.3%
86.6/80.5
257/239
.409/.326

188/127
67.6%
87.5/80.5
259/239
.354/.279

151/108
71.3%
-
.335/.287

Alpina 1705885 Digger

N/A

42mm/36mm

N/A

53/39
73.6%

106/86
81.1%
49.4/54.5
146/162
.699/.661

151/124
82.1%
70.3/78.6
208/233
.664/.636

183/139
76%
85.2/88.1
252/261
.603/.535

190/145
76.3%
88.5/91.9
262/272
.501/.446

191/154
80.6%
88.9/97.6
264/289
.42/.395

195/156
80%
90.8/98.9
269/293
.367/.343

153/120
78.9%
-
.335/.287

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

2mm

4mm

6mm

8mm

10mm

12mm

14mm

16mm

18mm

20mm

22mm

Average

M20B25_885 Ported /Andre' Norrback

N/A

42mm/36mm
85mm
No Pipe

N/A

42/31
73.8%

82/61
74.4%

119/84
70.6%
55.4/53.2
164/158
.664/.547

154/103
66.9%
71.7/65.3
212/193
.645/.503

170/112
65.9%
79.2/71
235/210
.569/.438

177/119
67.2%
82.4/75.4
244/223
.494/.387

181/122
67.4%
84.3/77.3
250/229
.433/.34

184/-
85.7
254
.385

152/100
-
-
.335/.287

M20B25 AMC Ported /Andre' Norrback

N/A

42mm/35mm
86mm
No Pipe

N/A

48/36
75%

86/68
79.1%

115/100
87%
53.6/67.1
159/199
.642/.67

138/107
77.5%
64.3/71.8
190/213
.578/.538

156/117
75%
72.6/78.5
215/232
.522/.47

159/120
75.5%
74/80.5
219/238
.444/.402

161/120
74.5%
75/80.5
222/238
.385/.344

161/120
74.5%
75/80.5
222/238
.337/.301

139/107
77%
-
.335/.279

M20 325i Ported NPS

N/A

41.95mm/ 35.9mm
83mm
No Pipe

N/A

40/33
82.5%

82/64
78%

122/89
73%
56.9/56.7
169/168
.682/.581

153/106
69.3%
71.4/67.6
212/200
.641/.519

168/116
69%
78.4/73.9
232/219
.563/.454

173/121
69.9%
80.8/77.1
239/229
.483/.395

173/124
71.7%
80.8/79
239/234
.414/.347

145/103
71.2%
-
.334/.286

M52B20 Roadster Ported /Andre' Norrback

N/A

30mm/27mm
85mm
No Pipe

N/A

55/51
92.7%

112/98
87.5%

162/122
75.3%
73.9/68.7
219/204
.633/.53

186/138
74.2%
84.9/77.7
252/230
.545/.449

189/148
78.3%
86.3/83.4
256/247
.443/.386

190/152
80%
86.7/85.6
257/254
.371/.33

168/132
78.4%
-
.239/.215

M20 323i 1264200 Marquis Rex

N/A

40mm/34mm

N/A

33/-

69/-

101/-
51.9
154
.592

117/-
60.1
178
.514

119/-
61.1
181
.418

123/-
63.1
187
.36

106
-
-
.319/.271

M20 323i 1277731 Marquis Rex

N/A

40mm/34mm

N/A

32/-

68/-

105/-
53.9
160
.615

129/-
66.2
196
.567

136/-
69.8
207
.478

141/-
72.4
214
.413

116
-
-
.319/.271

M20 325i 1705885 Marquis Rex

N/A

42mm/36mm

N/A

36/-

78/-

112/-
52.2
155
.625

135/-
62.9
186
.565

158/-
73.6
218
.529

175/-
81.5
241
.488

132
-
-
.335/.287

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

Buick 320 Stright 8 Stock NPS Iron

N/A

1.77/1.45
3.543
No Pipe

N/A

50/43
86%

101/83
82.2%

128/93
72.7%
52/56.3
154/167
.526/.466

134/96
71.6%
54.5/58.1
161/172
.413/.361

121/90.7
74.9%
-
.358/.294

Buick 215 V8 Alum

N/A

1.525/1.35

N/A

128/81
63.3%
70.1/56.6
208/168
.457/.327

-
-
-
.309/.273

Buick 300 V8 Alum

N/A

1.625/1.312

N/A

105/96
91.4%

135/108
80%
65.1/79.9
193/237
.604/.598

142/115
81%
68.5/85.1
203/252
.476/.478

149/115
77.2%
71.8/85.1
213/252
.40/.382

154/116
75.3%
74.3/85.8
220/254
.344/.321

137/110
80.3%
-
.329/.266

Buick 300 V8 Ported Alum

N/A

1.775/1.50
-
No Pipe

N/A

66/47
71.2%

129/104
80.6%

174/130
74.7%
70.3/73.6
208/218
.712/.63

191/146
76.4%
77.2/82.6
229/245
.587/.531

196/152
77.6%
79.2/86
235/255
.481/.442

173/133
77.1%
-
.359/.304

Buick 300 V8 Ported Peak Performance Alum

N/A

1.625/1.312

N/A

151/108
71.5%

159/123
77.4%
76.7/91
227/270
.711/.681

160/129
80.6%
77.1/95.4
229/283
.537/.536

157/120
76.6%
-
.329/.266

Buick 340 V8 DynoDave Iron

N/A

1.81/1.37

N/A

54/38
70.4%

112/75
67%

153/99
64.7%
59.5/67.2
176/199
.614/.525

172/102
59.3%
66.8/69.2
198/205
.518/.406

175/104
59.4%
68/70.6
202/209
.422/.331

153/95.0
62.1%
-
.367/.277

Buick 340 1376330 NPS Iron

N/A

1.81/1.39

N/A

49/40
81.6%

102/80
78.4%

143/97
67.8%
55.6/63.9
165/189
.574/.507

156/102
65.4%
60.6/67.2
180/199
.47/.40

160/104
65%
62.2/68.5
184/203
.385/.326

160/-
62.2
184
.321

144/95.8
-
-
.367/.281

Buick 340 1376330 VJ Bowls Port Cleanup NPS Iron

N/A

1.81/1.39

N/A

57/44
77.2%

110/82
74.5%

155/104
67.1%
60.2/68.5
178/203
.622/.544

185/118
63.8%
71.9/77.8
213/230
.557/.463

185/130
70.3%
71.9/85.7
213/254
.446/.408

195/136
69.7%
75.8/89.6
225/266
.391/.356

166/114
68.7%
-
.367/.281

Buick Nailhead Stock Iron

N/A

1.875/1.437
4.00
No Pipe

124

63/41
65.1%

110/81
73.6%

146/101
69.2%
52.9/62.3
157/185
.566/.511

183/107
58.5%
66.3/66
196/195
.532/.406

188/111
59%
68.1/68.4
202/203
.437/.337

157/100
63.8%
-
.380/.291

Buick Nailhead '57 889 Mild Ported RnD Engineering I-30 E-30 Back Cut Iron

N/A

1.875/1.437
4.00
No Pipe

124

64/47
73.4%

126/76
60.3%

169/99
58.6%
61.2/61
181/181
.655/.501

196/111
56.6%
71/68.4
210/203
.57/.421

196/116
59.2%
71/71.5
210/212
.456/.352

172/101
58.5%
-
.380/.291

Buick Nailhead '66 401 Stock Babeola Iron

N/A

1.87/1.50

124

53/47
88.7%

110/78
70.9%

157/103
65.6%
57.2/58.3
169/173
.61/.499

180/117
65%
65.5/66.2
194/196
.525/.425

190/120
63.2%
69.2/67.9
205/201
.443/.349

196/123
62.8%
71.4/69.6
211/206
.381/.298

167/108
64.9%
-
.379/.304

Buick Nailhead 401 Ported Gessler Iron

N/A

1.875/1.50

N/A

62/48
77.4%

127/83
65.4%

171/108
63.2%
61.9/61.1
183/181
.663/.523

197/130
66%
71.3/73.6
211/218
.573/.472

212/138
65.1%
76.8/78.1
227/231
.493/.401

219/141
64.4%
79.3/79.8
235/236
.424/.342

185/120
64.8%
-
.380/.304

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

Buick GN Iron

N/A

1.71/1.50

N/A

156/110
70.5%
67.9/62.2
201/184
.398/.32

-
-
-
.346/.304

Buick GN Iron

N/A

1.71/1.50

N/A

52/45
86.5%

108/84
77.8%

149/101
67.8%
64.9/57.2
192/169
.633/.489

152/108
71.1%
66.2/61.1
196/181
.484/.392

155/111
71.6%
67.5/62.8
200/186
.395/.323

141/101
71.6%
-
.346/.304

Buick GN Iron

N/A

1.71/1.50

N/A

54/50
92.6%

111/96
86.5%

161/131
81.4%
70.1/74.1
208/220
.684/.635

177/136
76.8%
77.1/77
228/228
.564/.494

178/136
76.4%
77.5/77
230/228
.454/.395

157/125
79.6%
-
.346/.304

Buick GN Ported Iron

N/A

1.77/1.50

N/A

196/157
80.1%
79.7/88.8
236/263
.604/.57

-
-
-
.358/.304

Buick GN Ported Iron

N/A

1.77/1.50

N/A

59/49
83.1%

127/98
77.2%

175/142
81.1%
71.1/80.4
211/238
.719/.688

193/154
79.8%
78.4/87.1
232/258
.594/.56

202/156
77.2%
82.1/88.3
243/262
.498/.453

174/138
78.9%
-
.358/.304

Buick GN Ported VPE Iron

N/A

206/173
84%
-

217/181
83.4%
-

221/184
83.3%
-

215/179
83.5%

Buick GN Ported VPE Stage 3 Iron

N/A

205/174
84.9%
-

218/184
84.4%
-

223/184
82.5%
-

215/181
83.9%

Buick GN1 Mild Ported SF600

N/A

1.77/1.50
3.875

N/A

62/51
82.3%

128/106
82.8%

182/139
76.4%
74/78.7
219/233
.747/.673

216/164
75.9%
87.8/92.8
260/275
.665/.596

228/172
75.4%
92.7/97.3
275/288
.562/.50

228/177
77.6%
92.7/100
275/297
.468/.429

196/152
77.2%
-
.358/.304

Buick GN1 Ported

N/A

1.77/1.50

N/A

64/52
81.3%

143/115
80.4%

206/149
72.3%
83.7/84.3
248/250
.846/.722

237/181
76.4%
96.3/102
285/303
.73/.658

244/197
80.7%
99.2/111
294/330
.601/.573

208/161
77.3%
-
.358/.304

TA Performance Street Intimidator

156/72

1.94/1.60
4.00
No Pipe

59/61
103%

118/107
90.7%

167/143
85.6%
56.5/71.1
167/211
.626/.65

210/162
77.1%
71/80.6
211/239
.59/.552

210/177
84.3%
71/88
211/261
.472/.482

213/180
84.5%
72.1/89.5
214/265
.399/.409

184/154
83.8%
1.37/2.50
.393/.324

TA Performance Street Eliminator

163/73

1.94/1.60

46/55

59/42
71.2%

108/87
80.6%

156/121
77.6%
52.8/60.2
156/178
.584/.55

184/135
73.4%
62.2/67.1
184/199
.517/.46

195/144
73.8%
66/71.6
195/212
.438/.392

204/145
71.1%
69/72.1
204/214
.382/.329

169/126
74.6%
1.25/1.99
.393/.324

TA Performance Street Eliminator Ported

163/73

1.94/1.60

N/A

87/49
56.3%

150/100
66.7%

204/139
68.1%
69/69.1
204/205
.764/.631

235/184
78.3%
79.5/91.5
236/271
.66/.627

263/195
74.1%
89/97
264/287
.591/.531

266/204
76.7%
90/101
267/301
.498/.463

224/164
73.5%
1.63/2.79
.393/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

Buick V6 Stage II Ported Chapman

247/-

2.10/1.625

40.5

68/53
77.9%

145/113
77.9%

221/174
78.7%
63.8/83.9
189/249
.765/.778

281/213
75.8%
81.1/103
240/304
.729/.714

321/229
71.3%
92.7/110
275/327
.667/.614

336/241
71.7%
97/116
287/344
.581/.539

341/247
72.4%
98.5/119
292/353
.506/.473

274/203
74%
1.38
.425/.329

Buick TA Ported to Stage I Iron

N/A

2.13/1.75

N/A

66/57
86.4%

133/109
82%

188/133
70.7%
52.8/55.3
156/164
.641/.552

226/147
65%
63.4/61.1
188/181
.578/.458

236/159
67.4%
66.2/66.1
196/196
.483/.396

234/159
67.9%
65.7/66.1
195/196
.399/.33

233/162
69.5%
65.4/67.4
194/200
.341/.288

208/145
69.5%
-
.431/.354

Buick 455 '73 860 Ported Smithberg Racing Iron

N/A

2.125/1.75
4.31
No Pipe

N/A

75/67
89.3%

157/115
73.2%

222/149
67.1%
62.6/61.9
185/184
.759/.619

268/170
63.4%
75.6/70.7
224/209
.687/.529

287/187
65.2%
80.9/77.7
240/230
.589/.466

289/193
66.8%
81.5/80.2
241/238
.494/.401

245/163
66.6%
-
.430/.354

Buick Stage I Iron

N/A

2.13/1.75

N/A

230/189
82.2%
64.5/78.6
191/233
.392/.392

-
-
-
.431/.354

Buick Stage I '74 Jim Iron

N/A

2.13/1.75

N/A

218/139
63.8%
61.2/57.8
181/171
.446/.346

-
-
-
.431/.354

Buick Stage I Ported Iron

N/A

295/205
69.5%
-

Buick Stage I Ported Iron

N/A

74/-

158/-

233/-
-

280/-
-

292/-
-

251

Buick Stage I Ported Iron

N/A

73/-

153/-

222/-
-

276/-
-

304/-
-

297/-
-

250

Buick Stage II

N/A

2.13/1.75

N/A

236/213
90.3%
66.2/88.6
196/262
.403/.442

-
-
-
.431/.354

Buick 350 Rick Crawford Iron

N/A

Stock

N/A

55/44
80%

112/100
89.3%

165/119
72.1%
-

199/137
68.8%
-

196/146
74.5%
-

199/149
74.9%
-

174/130
74.7%

Buick 350 Rick Crawford Ported Iron

N/A

1.92/1.55

N/A

65/66
101%

122/114
93.4%

180/150
83.3%
62.2/79.5
184/236
.681/.703

236/179
75.8%
81.5/94.9
242/281
.67/.629

260/191
73.5%
89.8/101
266/300
.59/.537

264/199
75.4%
91.2/105
270/312
.50/.467

212/167
78.4%
-
.389/.314

Buick 455 Iron

N/A

2.00/1.625

N/A

59/52
88.1%

120/100
83.3%

175/124
70.9%
55.7/59.8
165/177
.636/.555

208/140
67.3%
66.2/67.5
196/200
.567/.47

218/147
67.4%
69.4/70.9
206/210
.475/.394

180/128
70.9%
-
.405/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

Buick 455 Iron

184/142

2.125/1.75

N/A

220/150
68.2%
62/62.4
184/185
.376/.311

-
-
1.20/1.06
.430/.354

Buick 455 Ported Gessler Iron

N/A

2.125/1.75

N/A

71/61
85.9%

146/119
81.5%

213/145
68.1%
60.1/60.3
178/179
.728/.602

259/172
66.4%
73/71.5
216/212
.664/.536

270/187
69.3%
76.1/77.7
226/230
.554/.466

264/195
73.9%
74.4/81.1
221/240
.451/.405

230/164
71%
-
.430/.354

Buick 430 (Stage 1 Valves) Charlie Evans Iron

N/A

2.125/1.75

N/A

76/57
75%

142/97
68.3%

198/124
62.6%
55.8/51.6
165/153
.677/.515

227/142
62.6%
64/59
190/175
.582/.442

225/152
67.6%
63.4/63.2
188/187
.462/.379

227/156
68.7%
64/64.9
190/192
.388/.324

204/134
65.8%
-
.430/.354

Buick Converted to Stage 1 Valves TA Iron

N/A

2.13/1.755

N/A

66/57
86.4%

133/109
82%

188/133
70.7%
52.8/55
156/163
.641/.551

226/147
65%
63.4/60.8
188/180
.578/.457

236/159
67.4%
66.2/65.7
196/195
.483/.395

233/159
68.2%
65.4/65.7
194/195
.397/.329

233/162
69.5%
65.4/67
194/198
.341/.287

208/145
69.6%
-
.431/.355

Buick 430 985 Ported TA SF600 Iron

N/A

2.13/1.755
4.350

N/A

142/109
76.8%

202/155
76.7%
56.7/64.1
168/190
.689/.642

250/176
70.4%
70.2/72.8
208/216
.64/.547

287/199
69.3%
80.5/82.3
239/244
.588/.494

300/204
68%
84.2/84.3
249/250
.512/.422

236/169
71.4%
-
.431/.355

Bulldog Alum

N/A

2.125/1.75

N/A

82/62
75.6%

144/114
79.2%

204/155
76%
57.5/64.4
170/191
.698/.644

253/184
72.7%
71.3/76.5
211/227
.649/.573

293/201
68.6%
82.6/83.6
245/248
.601/.501

303/215
71%
85.4/89.4
253/265
.518/.446

239/174
72.6%
-
.430/.354

Bulldog CCM Alum

250/-

2.19/1.81

-
-
-
.443/.367

Bulldog Ported Earick Racing Alum

N/A

101/-

162/-

234/-
-

344/-
-

349/-
-

380/-
-

294

Edelbrock Performer RPM 60049 SF1020 Alum

215/130

2.125/1.75

68/58
85.3%

127/108
85%

190/150
78.9%
53.6/62.4
159/185
.65/.623

241/173
71.8%
68/71.9
201/213
.618/.539

274/183
66.8%
77.3/76.1
229/225
.562/.456

273/190
69.6%
77/79
228/234
.467/.395

221/161
72.8%
1.27/1.46
.430/.354

Edelbrock Performer RPM 60049 Mike Alum

N/A

2.125/1.75

N/A

68/55
80.9%

130/107
82.3%

194/144
74.2%
54.7/59.9
162/177
.663/.598

251/164
65.3%
70.8/68.2
210/202
.644/.511

278/172
61.9%
78.4/71.5
232/212
.57/.429

283/175
61.8%
79.8/72.8
236/216
.484/.363

281/175
62.3%
79.2/72.8
235/216
.412/.311

236/156
66.1%
-
.430/.354

Edelbrock Performer RPM 60049 George Alum

N/A

2.125/1.75

N/A

66/55
83.3%

126/103
81.7%

192/139
72.4%
54.1/57.8
160/171
.657/.577

247/162
65.6%
69.6/67.4
206/200
.634/.505

279/175
62.7%
78.7/72.8
233/216
.572/.436

276/183
66.3%
77.8/76.1
231/225
.472/.38

278/185
66.5%
78.4/76.9
232/228
.407/.329

233/158
67.7%
-
.430/.354

Edelbrock Performer RPM Ported SF600 Alum

N/A

2.125/1.75

N/A

66/59
89.4%

137/115
83.9%

206/154
74.8%
58.1/64
172/190
.705/.64

260/177
68.1%
73.3/73.6
217/218
.667/.551

296/188
63.5%
83.5/78.2
247/232
.607/.468

301/194
64.5%
84.9/80.7
251/239
.515/.403

240/166
69%
-
.430/.354

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

Edelbrock Ported Gessler Level 2 Alum

N/A

2.125/1.75

N/A

68/66
97.1%

142/116
81.7%

210/155
73.8%
59.2/64.4
175/191
.718/.644

260/176
67.7%
73.3/73.2
217/217
.667/.548

294/187
63.6%
82.9/77.7
246/230
.603/.466

305/193
63.3%
86/80.2
255/238
.522/.401

242/165
68.3%
-
.430/.354

TA Performance Ported 455 Iron

N/A

2.13/1.75

N/A

250/180
72%
70.2/74.8
208/222
.426/.374

-
-
-
.431/.354

TA Performance Street Eliminator SF600

N/A

2.16/1.755

N/A

72/-

149/-

194/161
83%
52.9/66.6
157/197
.653/.667

249/190
76.3%
68/78.5
201/233
.628/.59

285/206
72.3%
77.8/85.2
230/252
.575/.512

290/211
72.8%
79.1/87.2
234/258
.488/.437

281/211
75.1%
76.7/87.2
227/258
.405/.374

241/196
-
-
.437/.355

TA Performance Street Eliminator

N/A

2.26/1.755

N/A

70/59
84.3%

140/112
80%

194/161
83%
48.4/66.6
143/197
.624/.667

249/190
76.3%
62.1/78.5
184/233
.601/.59

285/206
72.3%
71/85.2
211/252
.55/.512

290/211
72.8%
72.3/87.2
214/258
.466/.437

281/211
75.1%
70/87.2
208/258
.387/.374

240/182
75.8%
-
.458/.355

TA Performance Street Eliminator Stage 1 Ported

263/179

2.26/1.755

50/57
114%

149/122
81.9%

214/167
78%
53.3/69
158/205
.688/.692

276/197
71.4%
68.8/81.4
204/241
.666/.612

329/226
68.7%
82/93.4
243/277
.635/.562

361/237
65.7%
90/98
267/290
.58/.491

266/190
71.4%
1.37/1.32
.458/.355

TA Performance Street Eliminator Stage 1 Ported Gessler

N/A

2.16/1.755

N/A

70/61
87.1%

144/112
77.8%

208/165
79.3%
56.8/68.2
168/202
.70/.683

266/194
72.9%
72.6/80.2
215/238
.671/.603

310/214
69%
84.6/88.5
251/262
.626/.532

328/226
68.9%
89.5/93.4
265/277
.552/.468

251/182
72.5%
-
.437/.355

TA Performance Street Eliminator Stage 2 Kerry SF600

N/A

2.16/1.755
4.375

N/A

72/-

149/-

218/-
59.5
176
.733

273/-
74.5
221
.689

298/-
81.3
241
.602

295/-
80.5
239
.496

300/-
81.9
243
.433

256
-
-
.437/.355

TA Performance Street Eliminator Stage 2 Ported Kerry SF600

N/A

2.16/1.755
4.375
No Pipe

N/A

75/69
92%

157/128
81.5%

238/176
73.9%
65/72.8
192/216
.801/.729

305/222
72.8%
83.2/91.8
247/272
.77/.689

347/251
72.3%
94.7/104
281/307
.70/.624

361/263
72.9%
98.5/109
292/322
.607/.545

360/265
73.6%
98.2/110
291/325
.519/.47

367/266
72.5%
100/110
297/326
.463/.413

305/224
73.6%
-
.437/.355

TA Performance Street Eliminator Stage 2 Ported Kerry SF600

N/A

2.16/1.755
4.375
2 1/8" Pipe

N/A

75/70
93.3%

157/135
86%

238/187
78.6%
65/77.3
192/229
.801/.774

305/236
77.4%
83.2/97.6
247/289
.77/.733

347/273
78.7%
94.7/113
281/334
.70/.678

361/294
81.4%
98.5/122
292/360
.607/.609

360/304
84.4%
98.2/126
291/372
.519/.54

367/306
83.4%
100/126
297/375
.463/.475

305/248
81.3%
-
.437/.355

TA Performance TE Stage 2 Ported Alum

N/A

2.26/1.755
4.50

388/268
69.1%
96.7/111
287/328
.535/.476

-
-
-
.458/.355

TA Performance Stage 1 Out of Box Jim Weise Alum

N/A

2.13/1.75

N/A

66/56
84.8%

140/112
80%

203/145
71.4%
57/60.3
169/179
.693/.602

248/182
73.4%
69.6/75.7
206/224
.635/.567

269/193
71.7%
75.5/80.2
224/238
.551/.481

279/197
70.6%
78.3/81.9
232/243
.476/.409

276/200
72.5%
77.5/83.2
230/246
.404/.356

236/172
72.7%
-
.431/.354

TA Performance Stage 1 Ported Jim Weise Alum

N/A

2.13/1.755

N/A

74/60
81.1%

152/126
82.9%

221/174
78.7%
62/71.9
184/213
.754/.721

274/205
74.8%
76.9/84.7
228/251
.701/.637

314/228
72.6%
88.1/94.3
261/279
.643/.566

314/230
73.2%
88.1/95.1
261/282
.536/.476

315/230
73%
88.4/95.1
262/282
.461/.408

265/199
75%
-
.431/.355

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

TA Performance Stage 1 Base Alum

N/A

2.13/1.755

N/A

280/200
71.4%
78.6/82.7
233/245
.478/.414

-
-
-
.431/.355

TA Performance Stage 1 Ported Alum

N/A

2.13/1.755

N/A

350/205
58.6%
98.2/84.7
291/251
.597/.424

-
-
-
.431/.355

TA Performance Stage 2 Alum

N/A

2.13/1.75

N/A

300/240
80%
84.2/99.8
249/296
.512/.498

-
-
-
.431/.354

TA Performance Stage 2 Ported Alum

N/A

2.13/1.75

N/A

350/260
74.3%
98.2/108
291/320
.597/.54

-
-
-
.431/.354

TA Performance Ported Alum

N/A

2.125/1.75

N/A

315/230
73%
88.8/95.6
263/283
.539/.478

-
-
-
.430/.354

TA Performance Stage 3 Alum

N/A

2.25/1.80

330/255
77.3%
83/100
246/297
.533/.515

-
-
-
.456/.365

TA Performance Stage 3 Ported Alum

N/A

2.30/1.80

385/270
70.1%
92.7/106
275/314
.608/.545

-
-
-
.466/.365

TA Performance Stage 3 Ported Alum

250/-

2.225/1.81

N/A

350/233
66.6%
90/90.6
267/268
.686/.561

360/263
73.1%
92.6/102
274/303
.588/.528

355/248
69.9%
1.44
.451/.367

TA Performance Stage 3 Alum Ported Bruce Kent

N/A

2.225/1.80

N/A

330/255
77.3%
84.9/100
251/297
.539/.515

385/295
76.6%
99/116
293/343
.539/.51

358/275
76.9%
-
.451/.365

TA Performance Stage 4 Alum

N/A

2.25/1.80

325/230
70.8%
81.7/90.4
242/268
.525/.464

-
-
-
.456/.365

TA Performance Stage 4 Alum

N/A

2.25/1.80

N/A

375/265
70.7%
94.3/104
279/309
.606/.535

-
-
-
.456/.365

TA Performance Stage 4 Alum

N/A

2.25/1.80

N/A

76/65
85.5%

147/129
87.8%

218/179
82.1%
54.8/70.3
162/208
.704/.723

266/222
83.5%
66.9/87.2
198/258
.644/.672

321/247
76.9%
80.7/97.1
239/288
.622/.598

362/260
71.8%
91/102
270/303
.585/.525

263/207
78.9%
-
.456/.365

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

Average

TA Performance Stage 4 Ported Alum

N/A

2.30/1.80

395/270
68.4%
95.1/106
282/314
.624/.545

-
-
-
.466/.365

TA Performance Stage 4 Ported Alum

N/A

2.20/-
4.40

N/A

74/-

154/-

225/-
59.2
175
.743

281/-
73.9
219
.696

335/-
88.1
261
.664

369/-
97.1
288
.609

378/-
99.4
295
.535

290
-
-
.446

TA Performance Stage 4 Ported Alum

N/A

2.26/-
4.40

N/A

70/-

140/-

204/-
50.9
151
.656

269/-
67.1
199
.649

325/-
81
240
.627

360/-
89.7
266
.579

385/-
96
284
.531

281
-
-
.458

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.650

.700

.800

.850

Average

Cadillac MTS Iron

N/A

55/41
74.5%

96/58
60.4%

147/110
74.8%
-

195/126
64.6%
-

225/137
60.9%
-

240/143
59.6%
-

181/115
63.6%

Cadillac Ported MTS Iron

N/A

68/57
83.8%

137/105
76.6%

191/137
71.7%
-

243/175
72%
-

268/192
71.6%
-

285/204
71.6%
-

286/208
72.7%
-

288/210
72.9%
-

243/176
72.5%

Cadillac 902 '69

200/145

1.96/-

83/73
88%

134/107
79.9%

180/140
77.8%
59.7
177
.667

215/164
76.3%
71.3
211
.598

248/181
73%
82.2
244
.552

263/191
72.6%
87.2
258
.488

277/206
74.4%
91.8
272
.44

220/165
75.1%
1.39/1.42
.397

Cadillac Ported Potter Automotive Iron

N/A

2.19/1.84

320/240
75%
85/90.3
252/267
.531/.474

-
-
-
.443/.373

Cadillac

185/124

2.00/1.625

119/87
73.1%

162/129
79.6%
51.6/62.2
153/184
.589/.577

214/149
69.6%
68.1/71.8
202/213
.583/.50

237/160
67.5%
75.4/77.1
224/229
.517/.429

240/162
67.5%
76.4/78.1
226/231
.436/.362

194/137
70.7%
1.30/1.31
.405/.329

Cadillac 493 '75

185/124

2.00/1.625

120

68/67
98.5%

130/97
74.6%

190/132
69.5%
60.5/63.6
179/189
.69/.59

215/160
74.4%
68.4/77.1
203/229
.586/.537

233/172
73.8%
74.2/82.9
220/246
.508/.462

246/-
78.3
232
.447

203/140
-
1.33/1.39
.405/.329

Cadillac 493 '75 Pocket Ported

N/A

2.00/1.625

N/A

94/80
85.1%

148/124
83.8%

186/150
80.6%
59.2/72.3
175/214
.676/.671

217/173
79.7%
69.1/83.4
205/247
.591/.58

246/183
74.4%
78.3/88.2
232/261
.536/.491

255/189
74.1%
81.2/91.1
241/270
.463/.423

210/164
77.9%
-
.405/.329

Bulldog Performance Alum

N/A

71/57
80.3%

136/102
75%

171/140
81.9%
-

230/170
73.9%
-

270/193
71.5%
-

294/209
71.1%
-

296/216
73%
-

286/222
77.6%
-

240/179
74.4%

Bulldog Performance Alum

N/A

2.19/1.84

88/63
71.6%

146/110
75.3%

203/145
71.4%
53.9/54.5
160/162
.674/.573

242/178
73.6%
64.2/66.9
190/198
.602/.527

276/202
73.2%
73.3/76
217/225
.55/.479

296/224
75.7%
78.6/84.2
233/250
.491/.442

233/172
73.9%
-
.443/.373

Bulldog Performance Alum

260/-

2.19/1.84

65/61
93.8%

125/117
93.6%

178/159
89.3%
47.3/59.8
140/177
.591/.628

238/203
85.3%
63.2/76.3
187/226
.592/.601

285/219
76.8%
75.7/82.4
224/244
.567/.519

307/235
76.5%
81.5/88.4
241/262
.509/.464

302/242
80.1%
80.2/91
238/270
.429/.41

239/196
81.9%
1.18
.443/.373

Bulldog Performance Ported CPP Alum

N/A

2.19/1.77

360/-
95.6
283
.512

-
-
-
.443/.358

Bulldog / MTS Ported Alum

N/A

2.25/1.86

N/A

345/268
77.7%
86.8/98.6
257/292
.514/.483

-
-
-
.456/.377

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.650

.700

.800

.850

Average

MTS Alum

N/A

2.19/-
4.35

N/A

78/-

135/-

178-

222/-
.050%
23.6
70.0
.295

.050%
58.9
175
.553

258/-
68.5
203
.514

274/-
72.7
216
.455

196/.050
-
-
.443

MTS Ported Alum

N/A

2.19/-
4.35

N/A

88/-

136/-

193/-
51.2
152
.64

244/-
64.8
192
.607

281/-
74.6
221
.559

318/-
84.4
250
.528

336/-
89.2
264
.478

338/-
89.7
266
.421

264
-
-
.443

MTS Ported Stage 3 Alum

N/A

2.19/1.84

N/A

73/63
86.3%

133/114
85.7%

192/157
81.8%
51/59
151/175
.637/.62

246/189
76.8%
65.3/71.1
194/211
.612/.56

299/215
71.9%
79.4/80.9
235/240
.595/.51

330/236
71.5%
87.6/88.8
260/263
.548/.466

341/250
73.3%
90.5/94
268/279
.485/.423

327/258
78.9%
86.8/97
257/287
.407/.382

267/203
76%
-
.443/.373

MTS CNC highport hand finished JC Alum

N/A

2.25/-
4.35

N/A

80/-

137/-

195/-
49
145
.63

251/-
63.1
187
.608

305/-
76.7
227
.591

340/-
85.5
253
.549

359/-
90.3
268
.535

375/-
94.3
279
.519

403/-
101
300
.488

296
-
-
.456

Cadillac Performance Parts Alum

295/-

2.275/1.80

171/109
63.7%

233/149
63.9%
57.3/58.6
170/173
.744/.602

296/184
62.2%
72.8/72.3
216/214
.709/.557

345/221
64.1%
84.9/86.8
251/257
.661/.535

376/249
66.2%
92.5/97.9
274/290
.601/.503

391/267
68.3%
96.2/105
285/311
.535/.462

398/278
69.8%
97.9/109
290/324
.477/.421

402/278
69.2%
98.9/109
293/324
.453/.396

327/217
66.4%
1.36
.461/.365

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.050

.100

.150

.200

.250

.300

.350

.400

.450

.500

Average

4.0 CHRFAB

N/A

33mm/29mm

N/A

26/30
115%

75/68
90.7%

111/94
84.7%
41.9/45.9
124/136
.621/.598

144/109
75.7%
54.3/53.2
161/158
.604/.52

171/119
69.6%
64.5/58.1
191/172
.574/.454

193/126
65.3%
72.8/61.5
216/182
.54/.401

207/131
63.3%
78.1/64
231/190
.496/.357

212/134
63.2%
80/65.4
237/194
.445/.32

215/138
64.2%
81.1/67.4
240/200
.401/.293

217/142
65.4%
81.8/69.3
242/205
.364/.271

172/118
68.7%
-
.263/.231

4.6 CHRFAB

N/A

33mm/29mm

N/A

39/29
74.4%

81/67
82.7%

122/98
80.3%
46/47.9
136/142
.682/.624

157/123
78.3%
59.2/60.1
175/178
.659/.587

186/134
72%
70.2/65.4
208/194
.624/.512

208/141
67.8%
78.4/68.9
232/204
.582/.449

218/146
67%
82.2/71.3
244/211
.523/.398

219/150
68.5%
82.6/73.3
245/217
.459/.358

222/153
68.9%
83.7/74.7
248/221
.414/.325

225/154
68.4%
84.9/75.2
251/223
.378/.294

182/130
71.2%
-
.263/.231

4.6 Ported CHRFAB

N/A

33mm/29mm

N/A

40/29
72.5%

83/59
71.1%

124/92
74.2%
46.8/44.9
139/133
.694/.586

159/121
76.1%
60/59.1
178/175
.667/.578

190/137
72.1%
71.7/66.9
212/198
.638/.523

218/150
68.8%
82.2/73.3
244/217
.61/.477

239/160
66.9%
90.1/78.1
267/232
.573/.436

255/176
69%
96.2/86
285/255
.535/.42

266/183
68.8%
100/89.4
297/265
.496/.388

273/187
68.5%
103/91.3
305/271
.458/.357

201/141
70%
-
.263/.231

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy Bow Tie

171/-

2.02/1.60

N/A

212/145
68.4%
66.2/72.1
196/214
.458/.395

211/147
69.7%
65.8/73.1
195/217
.38/.334

212/146
69%
1.24
.409/.324

Chevy Bow Tie

178/-

N/A

221/138
62.4%
-

-
-
1.24

Chevy Bow Tie 034 Meaux Racing Out of Box SF600 Iron

N/A

2.02/1.60
4.00
Pipe

N/A

119/108
90.8%

171/140
81.9%
53.4/69.6
158/206
.615/.636

206/146
70.9%
64.3/72.6
190/215
.556/.497

230/147
63.9%
71.8/73.1
213/217
.496/.401

217/149
68.7%
67.7/74.1
201/220
.39/.338

219/149
68%
68.3/74.1
202/220
.338/.29

194/140
72.2%
-
.409/.324

Chevy Bow Tie 034 Ported Meaux Racing SF600 Iron

223/-

2.085/1.585
4.00
No Pipe

N/A

134/107
79.9%

195/150
76.9%
57.1/76
169/225
.68/.688

241/201
83.4%
70.6/102
209/302
.63/.691

275/216
78.5%
80.5/109
239/324
.575/.594

293/222
75.8%
85.8/113
254/333
.511/.509

303/224
73.9%
88.7/114
263/336
.453/.44

311/224
72%
91.1/114
270/336
.407/.385

317/225
71%
92.8/114
275/338
.368/.344

259/196
75.8%
1.42
.422/.321

Chevy Bow Tie 034 Ported Meaux Racing Larger Bore SF600 Iron

223/-

2.085/1.585
4.125

N/A

138/107
77.5%

199/150
75.4%
58.3/76
173/225
.694/.688

246/201
81.7%
72/102
213/302
.643/.691

279/216
77.4%
81.7/109
242/324
.583/.594

296/222
75%
86.7/113
257/333
.516/.509

307/224
73%
89.9/114
266/336
.459/.44

316/224
70.9%
92.6/114
274/336
.413/.385

322/225
69.9%
94.3/114
279/338
.374/.344

263/196
74.6%
1.44
.422/.321

Chevy Bow Tie Tri-Mark Iron

178/-

2.02/1.60

N/A

67/58
86.6%

125/90
72%

180/125
69.4%
56.2/62.2
166/184
.648/.568

218/135
61.9%
68/67.1
202/199
.588/.46

220/142
64.5%
68.6/70.6
203/209
.475/.387

216/147
68.1%
67.4/73.1
200/217
.389/.334

192/128
66.6%
1.24
.409/.324

Chevy Bow Tie Tri-Mark Ported Stealth Iron

178/-

2.02/1.60

N/A

68/60
88.2%

134/117
87.3%

192/152
79.2%
59.9/75.6
178/224
.691/.69

228/165
72.4%
71.1/82.1
211/243
.615/.562

238/170
71.4%
74.3/84.6
220/251
.514/.463

243/176
72.4%
75.8/87.5
225/259
.437/.40

207/156
75.4%
1.37
.409/.324

Chevy Bow Tie Tri-Mark Ported Super Stealth Iron

178/-

2.02/1.60

N/A

72/60
83.3%

142/115
81%

195/155
79.5%
60.8/77.1
180/228
.702/.704

236/170
72%
73.6/84.6
218/251
.637/.579

246/175
71.1%
76.8/87
227/258
.531/.477

252/181
71.8%
78.6/90
233/267
.453/.411

214/159
74.3%
1.42
.409/.324

Chevy Bow Tie 2

N/A

250/174
69.6%
-

Chevy Bow Tie Phase II Iron CCM

184/55

63/57
90.5%

130/100
76.9%

177/119
67.2%
-

205/123
60%
-

225/123
54.7%
-

210/127
60.5%
-

209/127
60.8%
-

193/120
62.2%
1.22/2.31

Chevy Bow Tie Vortec 185 CHW

185/64

2.00/1.55
-
No Pipe

62/49
79%

123/96
78%

172/124
72.1%
54.7/65.7
162/195
.625/.581

214/137
64%
68.1/72.6
202/215
.583/.482

233/144
61.8%
74.2/76.3
220/226
.508/.405

227/148
65.2%
72.3/78.4
214/232
.412/.347

228/153
67.1%
72.6/81.1
215/240
.355/.307

200/134
67%
1.26/2.39
.405/.314

Chevy Bow Tie Vortec 206 CHW

206/77

2.00/1.55
-
No Pipe

61/50
82%

127/99
78%

177/123
69.5%
56.3/65.2
167/193
.643/.577

216/140
64.8%
68.8/74.2
204/220
.589/.492

227/148
65.2%
72.3/78.4
214/232
.495/.416

233/155
66.5%
74.2/82.1
220/243
.423/.363

235/159
67.7%
74.8/84.3
222/250
.366/.319

203/137
67.8%
1.14/2.06
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy 083 NPS Iron

N/A

1.94/1.50
4.016
No Pipe

N/A

57/48
84.2%

113/99
87.6%

156/133
85.3%
52.8/75.3
156/223
.584/.644

178/140
78.7%
60.2/79.2
178/235
.50/.509

187/141
75.4%
63.3/79.8
187/236
.42/.41

187/143
76.5%
63.3/80.9
187/240
.35/.346

164/131
79.9%
-
.393/.304

Chevy 186 Fuelie Iron

161/65

2.02/1.60

60/38
63.3%

113/76
67.3%

159/110
69.2%
49.6/54.7
147/162
.572/.50

182/125
68.7%
56.8/62.2
168/184
.491/.426

187/135
72.2%
58.4/67.1
173/199
.404/.368

188/140
74.5%
58.7/69.6
174/206
.338/.318

166/117
70.7%
1.17/2.15
.409/.324

Chevy 291 Bowl Ported exhaust Cleanup trmnatr Iron

N/A

2.02/1.60
4.00
No Pipe

N/A

60/53
88.3%

125/101
80.8%

181/138
76.2%
56.5/68.6
167/203
.651/.627

216/163
75.5%
67.4/81.1
200/240
.583/.555

227/183
80.6%
70.8/91
210/270
.49/.499

227/190
83.7%
70.8/94.5
210/280
.408/.431

195/155
79.4%
-
.409/.324

Chevy 291 SS trmnatr Iron

162/65

1.94/1.50
4.06
No Pipe - Stahl 1/2" Adaptor

57.5

127/106
83.5%

187/141
75.4%
63.3/79.8
187/236
.701/.683

225/167
74.2%
76.1/94.5
226/280
.632/.607

244/185
75.8%
82.5/105
245/310
.548/.538

249/194
77.9%
84.2/110
250/325
.466/.47

253/198
78.3%
85.6/112
254/332
.406/.411

256/200
78.1%
86.6/113
257/335
.36/.363

220/170
77.3%
1.58/3.08
.393/.304

Chevy 292 Bill Jones Iron

N/A

2.02/1.60
-
No Pipe

N/A

61/56
91.8%

120/98
81.7%

164/123
75%
51.2/61.2
152/181
.59/.559

190/130
68.4%
59.3/64.7
176/192
.513/.443

206/132
64.1%
64.3/65.7
190/195
.445/.36

212/119
56.1%
66.2/59.2
196/175
.381/.27

178/120
67.5%
-
.409/.324

Chevy 292 Ported Bill Jones Iron

N/A

2.06/1.635
-
No Pipe

N/A

68/57
83.8%

141/117
83%

189/171
90.5%
56.7/81.4
168/241
.667/.76

222/189
85.1%
66.6/90
197/267
.587/.63

245/201
82%
73.5/95.7
218/284
.519/.536

256/207
80.9%
76.8/98.6
228/292
.452/.46

211/177
84%
-
.417/.331

Chevy 292 Ported Butch Elkins Iron

197.4/-

2.02/1.625

N/A

137/110
80.3%

196/157
80.1%
61.2/75.7
181/224
.705/.702

235/185
78.7%
73.3/89.2
217/264
.634/.621

253/194
76.7%
78.9/93.5
234/277
.546/.521

267/198
74.2%
83.3/95.5
247/283
.48/.443

218/169
77.6%
-
.409/.329

Chevy 292 Ported Lee Shepard Iron

N/A

2.04/1.60
4.00
Pipe

N/A

126/128
101%

193/184
95.3%
59/91.5
175/271
.688/.836

234/218
93.2%
71.6/108
212/321
.625/.743

258/230
89.1%
78.9/114
234/339
.551/.627

269/236
87.7%
82.3/117
244/348
.479/.536

274/239
87.2%
83.8/119
248/352
.418/.465

226/206
91.2%
-
.413/.324

Chevy 292 Ported Rons Porting Service Iron

N/A

2.04/1.60
4.00
Pipe

N/A

118/120
101%

173/157
90.8%
52.9/78.1
157/231
.616/.713

210/183
87.1%
64.2/91
190/270
.561/.623

240/218
90.8%
73.4/108
218/321
.513/.594

261/224
85.8%
79.9/111
237/330
.465/.509

274/227
82.8%
83.8/113
248/335
.418/.442

213/188
88.5%
-
.413/.324

Chevy 292 Ported MadCap Racing Heads Iron

194/-

2.035/1.60
4.00
Pipe

N/A

122/115
94.3%

170/154
90.6%
52.3/76.6
155/227
.607/.699

213/193
90.6%
65.5/96
194/284
.57/.657

243/216
88.9%
74.7/107
221/318
.521/.589

261/222
85.1%
80.2/110
238/327
.466/.504

266/221
83.1%
81.8/110
242/326
.407/.43

213/187
87.9%
1.37
.412/.324

Chevy 292 Ported Meaux Racing Iron

197/-

2.055/1.60
4.00
Pipe

N/A

130/119
91.5%

186/166
89.2%
56.1/82.6
166/245
.658/.754

228/213
93.4%
68.7/106
204/314
.605/.726

258/245
95%
77.8/122
230/361
.547/.668

271/256
94.5%
81.7/127
242/377
.479/.581

280/257
91.8%
84.4/128
250/379
.424/.50

226/209
92.8%
1.42
.416/.324

Chevy 292 Ported Meaux Racing Iron

209.6/-

2.055/1.60
4.00
Pipe

N/A

132/119
90.2%

188/163
86.7%
56.7/81.1
168/240
.665/.74

233/207
88.8%
70.2/103
208/305
.618/.705

263/237
90.1%
79.3/118
235/349
.558/.646

274/251
91.6%
82.6/125
245/370
.484/.57

285/262
91.9%
85.9/130
255/386
.432/.51

229/207
90.1%
-
.416/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy 292 Ported Meaux Racing Iron

213/-

2.08/1.60
4.00
Pipe

N/A

129/-

188/-
55.3
164
.657

236/-
69.5
206
.618

270/-
79.5
235
.566

285/-
83.9
249
.498

298/-
87.7
260
.446

234
-
1.40
.421/.324

Chevy 292 Ported Joe Sherman Iron

N/A

2.08/1.60

N/A

204/141
69.1%
60/70.1
178/208
.713/.64

234/177
75.6%
68.9/88
204/261
.613/.603

261/202
77.4%
76.8/100
228/298
.547/.551

281/214
76.2%
82.7/106
245/315
.491/.486

288/217
75.3%
84.8/108
251/320
.431/.422

291/217
74.6%
85.6/108
254/320
.381/.37

260/195
74.9%
-
.421/.324

Chevy 416 Iron

165/59

1.84/1.50

-
-
-
.373/.304

Chevy 416 Bill Jones Iron

N/A

1.72/1.50
-
No Pipe

N/A

179/127
70.9%
77/71.9
228/213
.454/.369

-
-
-
.348/.304

Chevy 416 Mild Ported Bill Jones Iron

N/A

1.72/1.50
-
No PIpe

N/A

197/172
87.3%
84.8/97.3
251/288
.499/.50

-
-
-
.348/.304

Chevy 416 Meaux Racing Iron

N/A

1.84/1.50
4.00

N/A

99/90
90.9%

144/118
81.9%
54.2/66.8
160/198
.569/.572

175/132
75.4%
65.8/74.7
195/221
.518/.48

185/137
74.1%
69.6/77.5
206/230
.438/.398

184/137
74.5%
69.2/77.5
205/230
.363/.332

186/137
73.7%
69.9/77.5
207/230
.315/.284

162/125
77.2%
-
.373/.304

Chevy 416 Ported Meaux Racing SS Iron

N/A

1.84/1.50
4.00

N/A

99/98
99%

153/136
88.9%
57.5/77
170/228
.604/.659

197/170
86.3%
74.1/96.2
220/285
.584/.618

225/183
81.3%
84.6/104
251/307
.533/.532

231/188
81.4%
86.9/106
257/315
.456/.455

235/192
81.7%
88.4/109
262/322
.398/.399

235/196
83.4%
88.4/111
262/329
.348/.356

196/166
84.6%
-
.373/.304

Chevy 434 Weingartner Racing Iron

N/A

2.02/1.60
4.125
No Pipe

N/A

67/54
80.6%

126/104
82.5%

175/126
72%
54.6/62.7
162/186
.63/.572

209/132
63.2%
65.2/65.7
193/195
.564/.45

213/134
62.9%
66.5/66.6
197/197
.46/.365

216/133
61.6%
67.4/66.1
200/196
.389/.302

216/134
62%
67.4/66.6
200/197
.333/.261

193/127
66.1%
-
.409/.324

Chevy 441 Iron CHP

155/62

1.94/1.50
-
No Pipe

55/45
81.8%

110/80
72.7%

160/112
70%
54.1/63.4
160/188
.599/.543

194/127
65.5%
65.6/71.9
194/213
.545/.461

201/136
67.7%
68/77
201/228
.452/.395

203/139
68.5%
68.7/78.7
203/233
.38/.337

174/119
68.4%
1.31/2.24
.393/.304

Chevy 441 Iron CHP

155/62

1.94/1.50
-
Pipe

55/45
81.8%

110/83
75.5%

160/118
73.8%
54.1/66.8
160/198
.599/.572

194/133
68.6%
65.6/75.3
194/223
.545/.483

201/146
72.6%
68/82.6
201/245
.452/.424

203/148
72.9%
68.7/83.8
203/248
.38/.359

174/126
72.4%
1.31/2.39
.393/.304

Chevy 461 Weingartner Racing Iron

N/A

2.02/1.60
4.125
No Pipe

N/A

66/55
83.3%

131/108
82.4%

185/137
74.1%
57.7/68.1
171/202
.666/.622

222/162
73%
69.3/80.6
205/239
.599/.552

240/174
72.5%
74.9/86.5
222/256
.518/.474

236/176
74.6%
73.6/87.5
218/259
.425/.40

234/175
74.8%
73/87
216/258
.361/.341

208/155
74.7%
-
.409/.324

Chevy 461 Iron

161/63

2.02/1.60

216/137
63.4%
67.4/68.1
200/202
.466/.373

-
-
1.34/2.17
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy 461 Ported Iron

N/A

2.02/1.60
4.06

N/A

94/65
69.1%

152/102
67.1%

183/126
68.9%
57.1/62.7
169/186
.658/.572

210/147
70%
65.5/73.1
194/217
.567/.501

224/162
72.3%
69.9/80.6
207/239
.484/.441

232/172
74.1%
72.4/85.5
214/253
.417/.391

238/180
75.6%
74.3/89.5
220/265
.367/.35

207/148
71.8%
-
.409/.324

Chevy 461 Ported Creative Flow Management Iron

N/A

2.02/1.60
4.03
No Pipe

N/A

79/61
77.2%

140/110
78.6%

189/160
84.7%
59/79.6
175/236
.68/.727

231/188
81.4%
72.1/93.5
214/277
.623/.64

262/203
77.5%
81.8/101
242/299
.566/.553

274/212
77.4%
85.5/105
253/312
.493/.481

263/213
81%
82.1/106
243/314
.406/.415

227/181
79.9%
-
.409/.324

Chevy 461 Ported SS (Oval) Iron

165/65

2.02/1.60

M/A

260/200
76.9%
81.1/99.5
240/295
.351/.341

-
-
1.58/3.08
.409/.324

Chevy 461X 3-angle VJ Meaux Racing SF600 Iron

173.5/-

1.94/1.50
4.00
Pipe

N/A

100/88
88%

155/124
80%
52.4/70.2
155/208
.581/.601

189/142
75.1%
63.9/80.4
189/238
.531/.516

191/142
74.3%
64.6/80.4
191/238
.429/.413

193/146
75.6%
65.3/82.6
193/245
.361/.354

166/128
77.5%
-
.393/.304

Chevy 461X C/ED Ported Meaux Racing SF600 Iron

N/A

2.055/1.60
4.00
Pipe

N/A

131/116
88.5%

188/153
81.4%
56.7/76.1
168/225
.665/.695

230/194
84.3%
69.3/96.5
205/286
.61/.661

260/212
81.5%
78.4/105
232/312
.552/.578

273/245
89.7%
82.3/122
244/361
.483/.556

282/253
89.7%
85/126
252/373
.427/.492

227/196
86%
-
.416/.324

Chevy 462 Iron CCM

157/64

1.94/1.50
-
No Pipe

50/54
108%

119/88
73.9%

167/116
69.5%
56.5/65.6
167/194
.626/.562

198/128
64.6%
67/72.4
198/215
.556/.465

212/134
63.2%
71.7/75.8
213/225
.476/.39

218/137
62.8%
73.8/77.5
219/230
.408/.332

183/121
66%
1.39/2.14
.393/.304

Chevy 462 Iron CCM

157/64

1.94/1.50
-
Pipe

50/54
108%

119/91
76.5%

167/121
72.5%
56.5/68.5
167/203
.626/.586

198/134
67.7%
67/75.8
198/225
.556/.487

212/139
65.6%
71.7/78.7
213/233
.476/.404

218/142
65.1%
73.8/80.4
219/238
.408/.344

183/125
68.6%
1.39/2.22
.393/.304

Chevy 462 Bill Jones Iron

N/A

1.94/1.50
-
No Pipe

N/A

58/50
86.2%

121/94
77.7%

169/124
73.4%
57.2/70.2
169/208
.633/.601

192/131
68.2%
65/74.1
192/220
.539/.476

197/135
68.5%
66.6/76.4
197/226
.443/.392

206/137
66.5%
69.7/77.5
206/230
.386/.332

177/124
70.2%
-
.393/.304

Chevy 462 Kendrick Auto

N/A

2.02/1.60

N/A

84/56
66.7%

130/104
80%

166/125
75.3%
51.8/62.2
153/184
.597/.568

196/136
69.4%
61.2/67.6
181/200
.529/.463

214/141
65.9%
66.8/70.1
198/208
.462/.384

215/144
67%
67.1/71.6
199/212
.387/.327

184/130
70.6%
-
.409/.324

Chevy 462 Pocket Ported Kendrick Auto

N/A

2.02/1.60

N/A

81/55
67.9%

127/109
85.8%

169/136
80.5%
52.7/67.6
156/200
.608/.618

202/159
78.7%
63/79.1
187/234
.545/.542

223/179
80.3%
69.6/89
206/264
.481/.488

226/187
82.7%
70.5/93
209/276
.407/.425

189/154
81.3%
-
.409/.324

Chevy 492 Cast Heads Iron

157/62

2.02/1.60

69/57
82.6%

130/107
82.3%

173/125
72.3%
54/62.2
160/184
.622/.568

198/137
69.2%
61.8/68.1
183/202
.534/.467

206/141
68.4%
64.3/70.1
190/208
.445/.384

209/141
67.5%
65.2/70.1
193/208
.376/.32

209/141
67.5%
65.2/70.1
193/208
.322/.274

188/132
70.4%
1.33/2.27
.409/.324

Chevy 492 Ported Cast Heads Iron

N/A

2.02/1.60

N/A

62/56
90.3%

129/109
84.5%

180/141
78.3%
56.2/70.1
166/208
.648/.64

217/166
76.5%
67.7/82.6
201/245
.586/.565

238/174
73.1%
74.3/86.5
220/256
.514/.474

244/181
74.2%
76.1/90
226/267
.439/.411

246/185
75.2%
76.8/92
227/273
.379/.36

209/159
76.2%
-
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy 492 Tri-Mark Iron

161/-

2.02/1.60

69/57
82.6%

129/108
83.7%

172/124
72.1%
53.7/61.7
159/183
.619/.563

196/141
71.9%
61.2/70.1
181/208
.529/.48

207/142
68.6%
64.6/70.6
191/209
.447/.387

210/143
68.1%
65.5/71.1
194/211
.378/.325

183/132
72%
1.30
.409/.324

Chevy 492 Ported Tri-Mark Stealth Iron

169/-

2.02/1.60

68/58
85.3%

141/113
80.1%

192/145
75.5%
59.9/72.1
178/214
.691/.659

218/162
74.3%
68/80.6
202/239
.588/.552

234/167
71.4%
73/83.1
216/246
.505/.455

240/170
70.8%
74.9/84.6
222/251
.432/.386

205/151
73.9%
1.42
.409/.324

Chevy 882 Iron CCM

151/59

1.94/1.50
-
No Pipe

70/58
82.9%

125/108
86.4%

175/135
77.1%
59.2/76.4
175/226
.656/.654

204/141
69.1%
69/79.8
204/236
.573/.512

205/142
69.3%
69.4/80.4
205/238
.461/.413

206/142
68.9%
69.7/80.4
206/238
.386/.344

183/134
73%
1.36/2.41
.393/.304

Chevy 882 Iron CCM

151/59

1.94/1.50
-
Pipe

70/59
84.3%

125/109
87.2%

175/136
77.7%
59.2/77
175/228
.656/.659

204/143
70.1%
69/80.9
204/240
.573/.52

205/144
70.2%
69.4/81.5
205/241
.461/.419

206/145
70.4%
69.7/82.1
206/243
.386/.351

183/135
74%
1.36/2.46
.393/.304

Chevy Fast Burn 4298 GM Alum

202/78

2.00/1.55

62/55
88.7%

136/104
76.5%

187/133
71.1%
59.5/70.5
176/209
.679/.624

232/158
68.1%
73.8/83.7
219/248
.632/.556

266/180
67.7%
84.7/95.4
251/283
.58/.506

275/193
70.2%
87.5/102
259/303
.50/.452

219/154
70.1%
1.36/2.47
.405/.314

Chevy Fast Burn 4298 Bob

202/78

2.00/1.55

N/A

133/98
73.7%

183/129
70.5%
58.3/68.4
173/203
.665/.605

225/150
66.7%
71.6/79.5
212/236
.613/.527

254/171
67.3%
80.9/90.6
240/269
.554/.481

244/179
73.4%
77.7/94.9
230/281
.443/.42

248/184
74.2%
78.9/97.5
234/289
.386/.37

215/152
70.8%
1.26/2.36
.405/.314

Chevy Fast Burn Dr Js Performance

N/A

2.00/1.55

N/A

70/51
72.9%

136/101
74.3%

188/140
74.5%
59.8/74.2
177/220
.683/.656

224/167
74.6%
71.3/88.5
211/262
.61/.587

237/189
79.7%
75.4/100
224/297
.517/.532

236/200
84.7%
75.1/106
223/314
.429/.469

237/207
87.3%
75.4/110
224/325
.369/.416

210/167
79.8%
-
.405/.314

Chevy Fast Burn CNC Dr Js Performance

N/A

2.00/1.55

N/A

70/51
72.9%

138/101
73.2%

194/134
69.1%
61.8/71
183/210
.705/.628

236/178
75.4%
75.1/94.3
223/280
.643/.626

265/202
76.2%
84.4/107
250/317
.578/.568

278/220
79.1%
88.5/117
262/345
.505/.516

284/234
82.4%
90.4/124
268/367
.442/.47

233/178
76.6%
-
.405/.314

Chevy Fast Burn Harry CNC Alum

215/76

2.00/1.55

62/55
88.7%

136/104
76.5%

187/133
71.1%
59.5/70.5
176/209
.679/.624

232/158
68.1%
73.8/83.7
219/248
.632/.556

266/180
67.7%
84.7/95.4
251/283
.58/.506

275/193
70.2%
87.5/102
259/303
.50/.452

219/154
70.1%
1.28/2.54
.405/.314

Chevy Fast Burn 7712 Out of Box Meaux Racing SF600 Alum

210/-

2.00/1.55
4.125
No Pipe

134/111
82.8%

177/124
70.1%
56.3/65.7
167/195
.643/.581

205/149
72.7%
65.3/79
193/234
.559/.524

223/166
74.4%
71/88
210/261
.486/.467

234/177
75.6%
74.5/93.8
221/278
.425/.415

237/182
76.8%
75.4/96.5
224/286
.369/.366

202/152
75.1%
1.13
.405/.314

Chevy Fast Burn Off ZZ383 Out of Box Smithberg Racing Alum

210/78

2.00/1.55
4.03

64/-

134/-

191/-
60.8
180
.694

234/-
74.5
221
.638

266/-
84.7
251
.58

253/-
80.5
239
.46

216
-
1.27
.405/.314

Chevy Fast Burn Off ZZ383 VJ 2.02 Int Smithberg Racing Alum

210/78

2.02/-
4.03

N/A

72/-

148/-

191/-
59.6
177
.687

236/-
73.6
218
.637

270/-
84.3
250
.583

259/-
80.8
239
.466

221
-
1.29
.409

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy Fast Burn Off ZZ383 Ported Smithberg Racing Alum

210/78

2.02/-
4.03

70/-

140/-

199/-
62.1
184
.716

249/-
77.7
230
.672

286/-
89.2
264
.617

296/-
92.4
274
.532

299/-
93.3
276
.461

245
-
1.42
.409

Chevy Turbo

N/A

201/177
88.1%
-

Chevy L83 462624 Jonas

158/-

1.94/1.50

44/41
93.2%

101/82
81.2%

155/125
80.6%
52.4/70.7
155/210
.581/.606

182/137
75.3%
61.6/77.5
182/230
.511/.498

196/140
71.4%
66.3/79.2
196/235
.441/.407

159/121
76.3%
1.24
.393/.304

Chevy L98 113 Alum

163/58

1.94/1.50

62/-

116/-

161/-
54.5
161
.603

185/-
62.6
185
.52

195/-
66
195
.438

198/-
67
198
.371

171
-
1.21
.393/.304

Chevy L98 113 Alum

163/58

1.94/1.50

62/53
85.5%

115/101
87.8%

159/134
84.3%
53.8/75.8
159/225
.596/.649

189/157
83.1%
63.9/88.8
189/263
.531/.57

190/171
90%
64.3/96.8
190/287
.427/.497

163/141
86.2%
1.17/2.95
.393/.304

Chevy L98 Weingartner Racing Alum

N/A

1.94/1.50
4.125
No Pipe

N/A

60/70
116%

114/108
94.7%

174/152
87.4%
58.9/86
174/255
.652/.736

199/152
76.4%
67.3/86
199/255
.559/.552

205/166
81%
69.4/93.9
205/278
.461/.483

207/168
81.2%
70/95.1
207/282
.388/.407

180/149
83%
-
.393/.304

Chevy L98 113 Ported Precision Motorsports Alum

N/A

2.02/-

N/A

87/-

144/-

180/-
56.2
166
.648

218/-
68
202
.588

235/-
73.3
217
.507

243/-
75.8
225
.437

204
-
-
.409

Chevy L98 113 CNC TPIS Alum

N/A

2.00/1.56

55/40
72.7%

122/112
91.8%

193/154
79.8%
61.4/80.6
182/239
.701/.717

242/181
74.8%
77/94.7
228/281
.66/.632

270/197
73%
85.9/103
255/305
.589/.551

262/205
78.2%
83.4/107
247/318
.476/.478

218/170
78%
-
.405/.316

Chevy L98 Alum

163/58

1.94/1.50

120/100
83.3%

163/129
79.1%
55.1/73
163/216
.611/.625

189/148
78.3%
63.9/83.8
189/248
.531/.538

199/164
82.4%
67.3/92.8
199/275
.447/.477

199/167
83.9%
67.3/94.5
199/280
.373/.405

174/142
81.4%
1.22/2.88
.393/.304

Chevy L98 Alum

163/58

1.94/1.50
-
No Pipe

N/A

56/49
87.5%

120/96
80%

160/123
76.9%
54.1/69.6
160/206
.599/.596

186/140
75.3%
62.9/79.2
186/235
.523/.509

196/155
79.1%
66.3/87.7
196/260
.441/.451

199/157
78.9%
67.3/88.8
199/263
.373/.38

172/134
77.9%
1.22/2.71
.393/.304

Chevy L98 Hutter Alum

173/-

1.94/1.50

139/110
79.1%

190/145
76.3%
64.3/82.1
190/243
.712/.703

229/175
76.4%
77.5/99
230/293
.643/.636

243/190
78.2%
82.2/108
244/319
.546/.552

246/196
79.7%
83.2/111
247/329
.461/.475

209/163
77.9%
1.42
.393/.304

Chevy L98 CNC Chapman Alum

185/66

2.00/1.56
-
No Pipe

61/52
85.2%

121/109
90.1%

172/149
86.6%
54.7/78
162/231
.625/.694

216/182
84.3%
68.8/95.2
204/282
.589/.636

252/192
76.2%
80.2/100
238/298
.549/.537

190/158
83%
1.36/2.91
.405/.316

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy L98 Ported ET Performance Alum

184/-

2.00/1.55
4.03

62.5

67/52
77.6%

129/104
80.6%

187/146
78.1%
59.5/77.4
176/229
.679/.685

228/175
76.8%
72.6/92.7
215/275
.621/.615

242/188
77.7%
77/99.6
228/295
.528/.529

247/193
78.1%
78.6/102
233/303
.449/.452

207/161
78%
1.34
.405/.314

Chevy Vortec Iron CHP

170/-

1.94/1.50

66/57
86.4%

129/101
78.3%

186/136
73.1%
62.9/77
186/228
.697/.659

219/149
68%
74.1/84.3
220/250
.615/.541

216/155
71.8%
73.1/87.7
217/260
.485/.451

188/135
72.1%
1.29
.393/.304

Chevy Vortec 062 Weingartner Racing Iron

N/A

1.94/1.50
4.125
No Pipe

N/A

73/61
83.6%

144/113
78.5%

202/145
71.8%
68.3/82.1
202/243
.757/.703

236/158
66.9%
79.8/89.4
237/265
.663/.574

233/162
69.5%
78.8/91.7
234/272
.524/.471

233/165
70.8%
78.8/93.4
234/277
.436/.40

210/149
70.9%
-
.393/.304

Chevy Vortec 906 Weingartner Racing Iron

N/A

1.94/1.50
4.125
No Pipe

N/A

76/54
71.1%

137/106
77.4%

199/139
69.8%
67.3/78.7
199/233
.745/.673

239/152
63.6%
80.9/86
240/255
.671/.552

240/157
65.4%
81.2/88.8
241/263
.539/.456

241/159
66%
81.5/90
242/267
.451/.385

211/143
67.5%
-
.393/.304

Chevy Vortec 906 NPS Iron

N/A

1.94/1.50
4.016
No Pipe

N/A

62/43
69.4%

125/89
71.2%

178/119
66.9%
60.2/67.3
178/200
.667/.577

207/130
62.8%
70/73.6
207/218
.582/.472

225/134
59.6%
76.1/75.8
226/225
.506/.39

222/136
61.3%
75.1/77
223/228
.416/.329

191/122
63.5%
-
.393/.304

Chevy Vortec 906 Meaux Racing SF600 Iron

170/-

1.94/1.50
4.00

N/A

121/98
81%

179/124
69.3%
60.6/70.2
179/208
.671/.601

219/137
62.6%
74.1/77.5
220/230
.615/.498

221/146
66.1%
74.8/82.6
222/245
.497/.424

185/126
68.2%
1.30
.393/.304

Chevy Vortec 906 Meaux Racing 3 Angle VJ and clean up SF600 Iron

170/-

1.94/1.50
4.00

N/A

134/107
79.9%

187/142
75.9%
63.3/80.4
187/238
.701/.688

223/157
70.4%
75.4/88.8
224/263
.627/.57

221/163
73.8%
74.8/92.2
222/273
.497/.474

191/142
74.4%
1.31
.393/.304

Chevy Vortec 906 CHW Iron

170/64

1.94/1.50
-
No Pipe

63/44
69.8%

127/93
73.2%

178/125
70.2%
60.2/70.7
178/210
.667/.606

212/140
66%
71.7/79.2
213/235
.596/.509

229/144
62.9%
77.5/81.5
230/241
.515/.419

224/146
65.2%
75.8/82.6
225/245
.42/.354

223/147
65.9%
75.4/83.2
224/246
.358/.305

199/133
66.6%
1.35/2.30
.393/.304

Chevy Vortec 906 Ported CHW Iron

178/64

2.05/1.60
-
No Pipe

70/61
87.1%

143/115
80.4%

193/139
72%
58.5/69.1
173/205
.684/.631

230/165
71.7%
69.7/82.1
206/243
.612/.562

251/170
67.7%
76/84.6
225/251
.534/.463

241/177
73.4%
73/88
216/261
.427/.402

235/180
76.6%
71.2/89.5
211/265
.357/.35

216/158
73.2%
1.41/2.81
.415/.324

Chevy Vortec 906 Ported Smithberg Racing Street Bowl SSR work Iron

178/65

2.00/1.56
4.03
No Pipe

67/52
77.6%

140/104
74.3%

200/143
71.5%
63.7/74.8
189/222
.727/.666

245/165
67.3%
78/86.3
231/256
.668/.576

250/184
73.6%
79.6/96.3
236/285
.545/.514

252/190
75.4%
80.2/99.4
238/295
.458/.443

217/157
72.3%
1.42/2.92
.405/.316

Chevy Vortec Scoggin-Dickey 170 Iron CHP

170/A

1.94/1.50

57/40
70.2%

123/100
81.3%

174/139
79.9%
58.9/78.7
174/233
.652/.673

212/153
72.2%
71.7/86.6
213/257
.596/.556

210/160
76.2%
71/90.5
211/268
.472/.465

207/162
78.3%
70/91.7
207/272
.388/.392

185/143
77.1%
1.25
.393/.304

Chevy Vortec Scoggin-Dickey 180 Iron CHP

180/-

2.00/1.55

71/53
74.6%

139/102
73.4%

182/131
72%
57.9/69.4
172/206
.661/.614

224/146
65.2%
71.3/77.4
211/229
.61/.513

248/161
64.9%
78.9/85.3
234/253
.541/.453

240/165
68.8%
76.4/87.4
226/259
.436/.387

207/141
68.2%
1.38
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy Vortec L30 059

N/A

1.84/1.50

N/A

68/47
69.1%

128/103
80.5%

179/138
77.1%
67.3/78.1
199/231
.707/.669

205/152
74.1%
77.1/86
228/255
.607/.552

221/163
73.8%
83.1/92.2
246/273
.524/.474

183/139
75.9%
-
.373/.304

Chevy Vortec L31 Iron

170/61

1.94/1.50

58/43
74.1%

114/88
77.2%

173/125
72.3%
58.5/70.7
173/210
.648/.606

216/143
66.2%
73.1/80.9
217/240
.607/.52

225/149
66.2%
76.1/84.3
226/250
.506/.433

222/152
68.5%
75.1/86
223/255
.416/.368

190/131
69.2%
1.32/2.49
.393/.304

Chevy Vortec L31 885 Iron CCM

170/61

1.94/1.50
-
No Pipe

70/48
68.6%

138/101
73.2%

190/129
67.9%
64.3/73
190/216
.712/.625

227/140
61.7%
76.8/79.2
228/235
.638/.509

239/147
61.5%
80.9/83.2
240/246
.537/.427

229/151
65.9%
77.5/85.4
230/253
.429/.366

205/134
65.3%
1.41/2.48
.393/.304

Chevy Vortec L31 885 Iron CCM

170/61

1.94/1.50
-
Pipe

70/49
70%

139/105
75.5%

190/137
72.1%
64.3/77.5
190/230
.712/.664

227/151
66.5%
76.8/85.4
228/253
.638/.549

239/160
66.9%
80.9/90.5
240/268
.537/.465

229/162
70.7%
77.5/91.7
230/272
.429/.392

205/143
69.8%
1.41/2.66
.393/.304

Chevy Vortec L31 885 Ported Iron CHP

N/A

1.94/1.50

N/A

60/50
83.3%

128/101
78.9%

193/162
83.9%
65.3/91.7
193/272
.723/.785

224/181
80.8%
75.8/102
225/303
.629/.658

239/181
75.7%
80.9/102
240/303
.537/.526

196/156
79.7%
-
.393/.304

Chevy Vortec L31 Tri-Mark Iron

168/-

1.94/1.50

67/51
76.1%

129/98
76%

183/133
72.7%
61.9/75.3
183/223
.686/.644

218/146
67%
73.8/82.6
219/245
.612/.531

217/151
69.6%
73.4/85.4
218/253
.488/.439

216/152
70.4%
73.1/86
217/255
.405/.368

193/136
70.6%
1.30
.393/.304

Chevy Vortec L31 Tri-Mark Ported Stealth Iron

173/-

1.94/1.50

N/A

68/58
85.3%

134/117
87.3%

192/145
75.5%
65/82.1
192/243
.719/.703

224/146
65.2%
75.8/82.6
225/245
.629/.531

232/170
73.3%
78.5/96.2
233/285
.521/.494

238/171
71.8%
80.5/96.8
239/287
.446/.414

204/150
73.4%
1.38
.393/.304

Chevy Vortec L31 Tri-Mark Ported Super Stealth Iron

184/-

1.94/1.50

N/A

67/60
89.6%

142/115
81%

198/155
78.3%
67/87.7
198/260
.742/.751

236/170
72%
79.8/96.2
237/285
.663/.618

246/175
71.1%
83.2/99
247/293
.553/.509

251/181
72.1%
84.9/102
252/303
.47/.438

215/159
74.2%
1.36
.393/.304

Chevy Vortec Ported McCoy

N/A

266/200
75.2%
-

Chevy Vortec / Bow Tie 421 Small Port Iron

175/65

2.00/1.55

225/152
67.6%
71.6/80.6
212/239
.613/.535

235/161
68.5%
74.8/85.3
222/253
.512/.453

236/163
69.1%
75.1/86.4
223/256
.429/.382

232/159
68.4%
1.35/2.51
.405/.314

Chevy Vortec / Bow Tie 431 Large Port Iron

206/77

2.00/1.55

268/164
61.2%
85.3/86.9
253/258
.487/.384

-
-
1.30/2.13
.405/.314

Chevy Vortec / Bow Tie Small Port Bob Iron

175/64

2.00/1.55

N/A

67/53
79.1%

136/100
73.5%

182/128
70.3%
57.9/67.8
172/201
.661/.60

223/145
65%
71/76.8
210/228
.608/.51

251/152
60.6%
79.9/80.6
237/239
.547/.428

240/164
68.3%
76.4/86.9
226/258
.436/.384

240/166
69.2%
76.4/88
226/261
.374/.334

212/143
67.2%
1.43/2.59
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy Vortec / Bow Tie Large Port Bob Iron

206/77

2.00/1.55

N/A

63/50
79.4%

133/100
75.2%

182/134
73.6%
57.9/71
172/210
.661/.628

228/154
67.5%
72.6/81.6
215/242
.621/.542

258/168
65.1%
82.1/89
243/264
.562/.473

255/168
65.9%
81.2/89
241/264
.463/.394

261/169
64.8%
83.1/89.6
246/265
.406/.34

220/149
67.8%
1.27/2.19
.405/.314

Chevy Vortec / Bow Tie Large Port Iron

215/84

2.00/1.55

-
-
-
.405/.314

Chevy 364 18 Deg 248 RCR Super Truck Alum

248/-

2.14/1.60

147/100
68%

231/167
72.3%
64.2/83.1
190/246
.784/.759

287/205
71.4%
79.8/102
236/302
.731/.698

324/237
73.1%
90.1/118
267/349
.66/.646

338/251
74.3%
94/125
278/370
.574/.57

343/257
74.9%
95.4/128
283/379
.499/.50

278/203
72.9%
1.38
.433/.324

Chevy 580 18 Deg 245 RCR Super Truck Alum

245/-

2.15/1.625

54/65

148/124
83.8%

223/180
80.7%
61.4/86.8
182/257
.754/.805

281/223
79.4%
77.4/108
229/319
.712/.748

325/238
73.2%
89.5/115
265/340
.659/.639

343/244
71.1%
94.5/118
280/349
.58/.546

346/247
71.4%
95.3/119
282/353
.501/.473

278/209
75.4%
1.41
.435/.329

Chevy 364 / 580 18 Deg 236 CNC Chapman Alum

236/-

2.135/1.625
-
No Pipe

52/65

71/54
76.1%

159/108
67.9%

224/182
81.3%
62.6/87.8
185/260
.762/.814

273/222
81.3%
76.3/107
226/317
.697/.745

305/238
78%
85.2/115
252/340
.623/.639

314/250
79.6%
87.7/121
260/357
.534/.559

323/260
80.5%
90.2/125
267/371
.471/.498

266/210
78.8%
1.37
.432/.329

Chevy 364 / 580 18 Deg 246 CNC Chapman Alum

246/-

2.15/1.625
-
No Pipe

52/65

68/52
76.5%

159/112
70.4%

227/175
77.1%
62.5/84.4
185/250
.767/.783

281/218
77.6%
77.4/105
229/311
.712/.731

319/235
73.7%
87.9/113
260/336
.647/.631

333/247
74.2%
91.7/119
272/353
.563/.552

342/255
74.6%
94.2/123
279/364
.495/.489

277/207
74.8%
1.39
.435/.329

Chevy 364 / 580 18 Deg 256 CNC Chapman Alum

256/-

2.18/1.625
-
No Pipe

52/66

72/54
75%

161/108
67.1%

233/182
78.1%
62.4/87.8
185/260
.777/.814

286/222
77.6%
76.6/107
227/317
.715/.745

321/238
74.1%
86/115
255/340
.642/.639

344/250
72.7%
92.2/121
273/357
.573/.559

348/260
74.7%
93.2/125
276/371
.497/.498

282/210
74.4%
1.36
.441/.329

Chevy 364 / 580 18 Deg 266 CNC Chapman Alum

266/-

2.18/1.625
-
No Pipe

52/66

71/51
71.8%

151/114
75.5%

226/180
79.6%
60.5/86.8
179/257
.753/.805

271/213
78.6%
72.6/103
215/304
.678/.714

323/240
74.3%
86.5/116
256/343
.646/.644

353/248
70.3%
94.6/120
280/354
.588/.555

358/255
71.2%
95.9/123
284/364
.511/.489

363/260
71.6%
97.3/125
288/371
.454/.436

292/216
73.8%
1.36
.441/.329

Chevy 364 / 580 18 Deg 249 Ported Hutter Alum

249/-

2.15/1.625

53/64

151/117
77.5%

232/163
70.3%
63.9/78.6
189/233
.784/.729

293/224
76.5%
80.7/108
239/320
.743/.751

322/244
75.8%
88.7/118
263/349
.653/.655

343/254
74.1%
94.5/122
280/363
.58/.568

347/261
75.2%
95.6/126
283/373
.503/.50

281/211
74.8%
1.39
.435/.329

Chevy 18 Deg Ported ET Performance Alum

257/-

2.15/1.60
4.03

N/A

74/49
66.2%

159/114
71.7%

231/177
76.6%
63.6/88
189/261
.781/.804

288/219
76%
79.3/109
235/323
.73/.746

323/238
73.7%
89/118
264/351
.655/.649

341/246
72.1%
93.9/122
278/363
.576/.559

268/199
74.1%
1.33
.435/.324

Chevy 18 Deg 247RS CNC Chapman Alum

247/105

2.15/1.625
-
No Pipe

47.5

72/51
70.8%

157/114
72.6%

228/180
78.9%
62.8/86.8
186/257
.771/.805

278/213
76.6%
76.6/103
227/304
.705/.714

317/240
75.7%
87.3/116
259/343
.643/.644

338/248
73.4%
93.1/120
276/354
.571/.555

342/255
74.6%
94.2/123
279/364
.495/.489

346/260
75.1%
95.3/125
282/371
.439/.436

287/216
75.3%
1.40/2.48
.435/.329

Chevy 18 Deg 255RS CNC Chapman Alum

255/105

2.18/1.625
-
No Pipe

47.5

71/51
71.8%

150/114
76%

226/180
79.6%
60.5/86.8
179/257
.753/.805

277/213
76.9%
74.2/103
220/304
.693/.714

323/240
74.3%
86.5/116
256/343
.646/.644

347/248
71.5%
93/120
275/354
.578/.555

351/255
72.6%
94/123
279/364
.501/.489

354/260
73.4%
94.8/125
281/371
.443/.436

290/216
74.5%
1.39/2.48
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy 18 Deg 270RS CNC Chapman Alum

270/105

2.18/1.625
-
No Pipe

47.5

71/51
71.8%

151/114
75.5%

226/180
79.6%
60.5/86.8
179/257
.753/.805

271/213
78.6%
72.6/103
215/304
.678/.714

323/240
74.3%
86.5/116
256/343
.646/.644

353/248
70.3%
94.6/120
280/354
.588/.555

358/255
71.2%
95.9/123
284/364
.511/.489

363/260
71.6%
97.3/125
288/371
.454/.436

292/216
73.8%
1.34/2.48
.441/.329

Chevy 18 Deg 235 CNC M2 Race Systems Alum

235/-

2.15/1.625
4.03

219/182
83.1%
60.3/87.8
179/260
.74/.814

277/238
85.9%
76.3/115
226/340
.702/.798

320/254
79.4%
88.1/122
261/363
.649/.682

340/262
77.1%
93.7/126
277/374
.575/.586

337/268
79.5%
92.8/129
275/383
.488/.514

299/241
80.6%
1.45
.435/.329

Chevy 18 Deg 255 CNC M2 Race Systems Alum

255/-

2.18/1.625
4.03

220/182
82.7%
58.9/87.8
175/260
.733/.814

279/238
85.3%
74.7/115
221/340
.698/.798

320/254
79.4%
85.7/122
254/363
.64/.682

351/262
74.6%
94/126
279/374
.585/.586

360/268
74.4%
96.4/129
286/383
.514/.514

306/241
78.7%
1.41
.441/.329

Chevy 18 Deg 270 CNC M2 Race Systems Alum

270/-

2.18/1.625
4.03

211/172
81.5%
56.5/82.9
167/246
.703/.769

272/213
78.3%
72.9/103
216/304
.68/.714

315/236
74.9%
84.4/114
250/337
.63/.633

352/247
70.2%
94.3/119
279/353
.587/.552

375/254
67.7%
100/122
298/363
.536/.487

381/262
68.8%
102/126
302/374
.476/.439

318/231
72.6%
1.41
.441/.329

Chevy 18 Deg CNC Alum

N/A

2.20/1.625

N/A

72/55
76.4%

151/111
73.5%

220/158
71.8%
57.9/76.2
171/226
.727/.707

275/218
79.3%
72.3/105
214/311
.681/.731

317/237
74.8%
83.4/114
247/339
.628/.636

353/250
70.8%
92.9/121
275/357
.583/.559

367/256
69.8%
96.5/123
286/366
.52/.491

371/262
70.6%
97.6/126
289/374
.46/.439

293/213
72.6%
-
.446/.329

Chevy 15 Deg CNC Alum

N/A

2.15/1.625

N/A

72/53
73.6%

154/111
72.1%

227/152
67%
62.5/73.3
185/217
.767/.68

227/209
92.1%
62.5/101
185/299
.575/.701

326/240
73.6%
89.8/116
266/343
.661/.644

349/253
72.5%
96.1/122
285/361
.59/.566

353/259
73.4%
97.2/125
288/370
.511/.496

358/262
73.2%
98.6/126
292/374
.454/.439

285/212
74.5%
-
.435/.329

Chevy 15 Deg CNC M2 Race Systems

245/-

2.18/1.625
4.03

-
-
-
.441/.329

Chevy 615x 15 Deg 261 CNC Chapman Alum

261/100

2.18/1.625
-
No Pipe

69/52
75.4%

149/110
73.8%

215/173
80.5%
57.6/83.4
171/247
.717/.774

278/215
77.3%
74.5/104
221/307
.695/.721

329/236
71.7%
88.1/114
261/337
.658/.633

363/249
68.6%
97.3/120
288/356
.605/.557

379/258
68.1%
102/124
301/369
.541/.494

391/261
66.8%
105/126
310/373
.489/.438

301/215
71.4%
1.50/2.61
.441/.329

Chevy 615 15 Deg CNC Rons Porting Service Alum

278/-

2.18/1.625

158/119
75.3%

227/170
74.9%
60.8/82
180/243
.757/.76

287/214
74.6%
76.9/103
228/306
.718/.718

335/245
73.1%
89.8/118
266/350
.67/.657

360/260
72.2%
96.4/125
286/371
.60/.581

366/270
73.8%
98.1/130
291/386
.523/.517

372/274
73.7%
99.7/132
295/391
.465/.46

301/222
73.7%
1.34
.441/.329

Chevy 15X 15 Deg 246 CNC Slawko Alum

246/102

2.15/1.60

348/265
76.1%
95.9/132
284/391
.441/.451

350/267
76.3%
96.4/133
286/393
.394/.404

349/266
76.2%
1.42/2.62
.435/.324

Chevy / GM Splayed Valve 12 Deg MBE Port

N/A

2.23/1.55
4.155
No Pipe

N/A

140/102
72.9%

221/150
67.9%
56.6/79.5
168/236
.72/.703

294/186
63.3%
75.3/98.6
223/292
.719/.654

354/232
65.5%
90.6/123
269/364
.692/.653

398/266
66.8%
102/141
302/418
.649/.624

414/273
65.9%
106/145
314/429
.578/.549

415/280
67.5%
106/148
315/440
.507/.492

425/278
65.4%
109/147
322/437
.462/.434

427/-
109
324
.417

343/221
-
-
.452/.314

Chevy / GM Splayed Valve 10 Deg MBE Port

N/A

-
-
No Pipe

N/A

436/-
-

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy 517 Canted Valve CNC Chapman Alum

294/-

2.18/1.625
-
No Pipe

71/54
76.1%

157/114
72.6%

236/179
75.8%
63.2/86.3
187/256
.787/.801

299/224
74.9%
80.1/108
237/320
.748/.751

331/239
72.2%
88.7/115
263/341
.662/.641

355/249
70.1%
95.1/120
282/356
.592/.557

371/255
68.7%
99.4/123
295/364
.53/.489

375/258
68.8%
100/124
298/369
.469/.433

303/217
71.5%
1.28
.441/.329

Chevy Canted Valve Ported ET Performance Alum

285/-

2.185/1.625
4.155

35-72

64/47
73.4%

148/100
67.6%

228/142
62.3%
60.8/68.5
180/203
.758/.635

318/183
57.5%
84.8/88.2
251/261
.793/.614

375/214
57.1%
100/103
296/306
.748/.574

402/237
59%
107/114
318/339
.669/.53

414/250
60.4%
110/121
327/357
.59/.479

419/258
61.6%
112/124
331/369
.523/.433

422/263
62.3%
113/127
333/376
.468/.392

341/206
60.4%
1.48
.442/.329

Chevy Canted Valve Ported Meaux Racing SF600 Alum

N/A

2.20/1.55
4.125
No Pipe

N/A

140/99
70.7%

213/150
70.4%
56/79.5
166/236
.704/.703

287/192
66.9%
75.5/102
224/301
.711/.675

335/228
68.1%
88.1/121
261/358
.664/.641

370/250
67.6%
97.3/132
288/393
.611/.586

387/261
67.4%
102/138
302/410
.548/.524

398/267
67.1%
105/142
310/419
.493/.469

304/207
67.9%
-
.446/.314

Chevy Canted Valve 10 Deg Pro Stock Truck '01 - Darin Morgan Alum

N/A

2.23/-
4.20

145/-

215/-
55
163
.701

285/-
73
216
.697

356/-
91.1
270
.696

400/-
102
303
.652

415/-
106
315
.58

425/-
109
322
.519

435/-
111
330
.473

442/-
113
335
.432

346
-
-
.452

Chevy / GM SB2.2 011 278 Ported GPTech Busch Alum

278/-

2.17/1.625

152/104
68.4%

235/164
69.8%
63.5/79.1
188/234
.787/.733

300/202
67.3%
81.1/97.4
240/289
.754/.678

348/233
67%
94.1/112
279/333
.699/.625

379/249
65.7%
102/120
304/356
.635/.557

373/258
69.2%
101/124
299/369
.535/.494

298/202
67.7%
1.36
.439/.329

Chevy / GM SB2.2 011 282 Ported GPTech Alum

282/-

2.18/1.625

141/97
68.8%

226/147
65%
60.5/70.9
179/210
.753/.657

302/188
62.3%
80.9/90.6
240/269
.755/.631

355/224
63.1%
95.1/108
282/320
.71/.601

384/252
65.6%
103/122
305/360
.64/.563

390/260
66.7%
104/125
310/371
.557/.498

300/195
65%
1.38
.441/.329

Chevy / GM SB2.2 011 275 Ported Neal Alum

275/-

2.15/1.60

148/109
73.6%

235/148
63%
64.7/73.6
192/218
.794/.672

292/200
68.5%
80.4/99.5
238/295
.74/.681

335/221
66%
92.3/110
273/326
.679/.602

351/238
67.8%
96.7/118
286/351
.593/.541

356/253
71.1%
98.1/126
291/373
.516/.492

286/195
68.1%
1.29
.435/.324

Chevy / GM SB2.2 011 282 Ported Neal Alum

282/-

2.15/1.625

136/104
76.5%

217/139
64.1%
59.8/67
177/199
.733/.622

288/180
62.5%
79.3/86.8
235/257
.73/.604

335/219
65.4%
92.3/106
273/313
.679/.588

352/237
67.3%
97/114
287/339
.595/.53

352/246
69.9%
97/119
287/351
.51/.471

280/188
67%
1.25
.435/.329

Chevy / GM SB2.2 011 287 Ported Neal Alum

287/-

2.17/1.60

143/95
66.4%

222/137
61.7%
60/68.1
178/202
.743/.622

293/180
61.4%
79.2/89.5
235/265
.736/.613

340/213
62.6%
91.9/106
272/314
.683/.58

374/230
61.5%
101/114
300/339
.626/.522

388/243
62.6%
105/121
311/358
.557/.473

293/183
62.4%
1.35
.439/.324

Chevy / GM SB2.2 Ported ET Performance Alum

N/A

2.215/1.60
4.155

N/A

76/56
73.7%

151/114
75.5%

229/169
73.8%
59.4/84.1
176/249
.751/.768

300/214
71.3%
77.9/106
231/315
.738/.729

363/240
66.1%
94.2/119
279/354
.715/.654

390/250
64.1%
101/124
300/368
.64/.568

397/254
64%
103/126
305/374
.558/.494

400/255
63.8%
104/127
308/376
.492/.434

319/214
67.1%
-
.449/.324

Chevy / GM SB2.2 267 CNC Chapman Alum

267/-

2.17/1.625
-
No Pipe

70/52
74.3%

159/112
70.4%

238/171
71.8%
64.4/82.5
191/244
.797/.765

301/207
68.8%
81.4/99.8
241/296
.756/.694

347/233
67.1%
93.8/112
278/333
.697/.625

367/249
67.8%
99.2/120
294/356
.615/.557

369/259
70.2%
99.8/125
296/370
.53/.496

373/262
70.2%
101/126
299/374
.468/.439

308/213
69.3%
1.40
.439/.329

Chevy / GM SB2.2 292 CNC Chapman Alum

292/-

2.17/1.625
-
No Pipe

65/52
80%

145/113
77.9%

236/173
73.3%
63.8/83.4
189/247
.79/.774

307/207
67.4%
83/99.8
246/296
.771/.694

367/233
63.5%
99.2/112
294/333
.737/.625

385/249
64.7%
104/120
308/356
.645/.557

389/259
66.6%
105/125
312/370
.558/.496

391/262
67%
106/126
313/374
.491/.439

317/214
67.4%
1.34
.439/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy / GM SB2.2 Drag MBE Port 1 Alum

312/-

2.19/1.59
4.15
No Pipe

N/A

70/45
64.3%

156/101
64.7%

240/139
57.9%
63.7/70
189/207
.796/.635

320/188
58.8%
85/94.7
252/281
.796/.644

377/230
61%
100/116
297/343
.751/.631

413/255
61.7%
110/128
325/381
.685/.583

426/266
62.4%
113/134
335/397
.606/.521

439/272
62%
117/137
345/406
.546/.466

339/207
61.2%
1.41
.443/.322

Chevy / GM SB2.2 Drag MBE Port 2 Alum

312/-

2.19/1.59

N/A

450/-
119
354
.448

-
-
1.44
.443/.322

Chevy / GM SB2.2 Drag MBE Port 3 I-55 E-55 SF600 Alum

312/-

2.18/1.60
4.155
No Pipe

N/A

61/50
82%

142/107
75.4%

224/145
64.7%
60/72.1
178/214
.747/.659

305/191
62.6%
81.7/95
242/281
.763/.651

364/230
63.2%
97.5/114
289/339
.728/.627

406/257
63.3%
109/128
322/379
.677/.584

428/270
63.1%
115/134
340/398
.611/.526

437/278
63.6%
117/138
347/410
.546/.474

442/283
64%
118/141
351/417
.491/.428

344/220
64.1%
1.42
.441/.324

Chevy / GM SB2.2 Hendricks - Meaux Racing SF600 Alum

N/A

2.18/1.60
4.125
No Pipe

N/A

142/107
75.4%

219/146
66.7%
58.7/72.6
174/215
.73/.663

289/184
63.7%
77.4/91.5
229/271
.723/.627

337/211
62.6%
90.3/105
268/311
.674/.575

359/236
65.7%
96.2/117
285/348
.598/.536

355/252
71%
95.1/125
282/371
.507/.491

356/263
73.9%
95.4/131
283/388
.445/.448

294/200
68%
-
.441/.324

Chevy / GM SB2.2 Hendricks - Meaux Racing SF600 Alum

N/A

2.20/1.60
4.125
No Pipe

N/A

142/107
75.4%

219/146
66.7%
57.6/72.6
171/215
.723/.663

289/184
63.7%
76/91.5
225/271
.716/.627

337/211
62.6%
88.7/105
263/311
.668/.575

355/252
71%
93.4/125
277/371
.586/.572

356/263
73.9%
93.7/131
277/388
.504/.512

398/267
67.1%
105/133
310/393
.493/.455

299/204
68.2%
-
.446/.324

Chevy / GM SB2.2 Hendricks - Darin Morgan SF600 Alum

N/A

2.18/1.60
-
No Pipe

N/A

132/90
68.2%

214/163
76.2%
57.3/81.1
170/240
.713/.74

299/200
66.9%
80.1/99.5
237/295
.748/.681

386/240
62.2%
103/119
306/354
.772/.654

410/260
63.4%
110/129
325/383
.683/.59

425/273
64.2%
114/136
337/402
.607/.531

442/278
62.9%
118/138
351/410
.553/.474

449/282
62.8%
120/140
356/416
.499/.427

451/287
63.6%
121/143
358/423
.451/.391

356/230
64.6%
-
.441/.324

Chevy / GM SB2.2 DEI - Darin Morgan SF600 Alum

N/A

2.18/1.60
-
No Pipe

N/A

158/101
63.9%

231/142
61.5%
61.9/70.6
183/209
.77/.645

310/180
58.1%
83.1/89.5
246/265
.775/.613

365/212
58.1%
97.8/105
290/312
.73/.578

392/244
62.2%
105/121
311/360
.653/.554

397/263
66.2%
106/131
315/388
.567/.512

404/269
66.6%
108/134
321/396
.505/.458

322/202
62.5%
-
.441/.324

Chevy / GM SB2.2 NASCAR '02 - Darin Morgan Alum

N/A

2.18/-
4.185

161/-

236/-
63.2
187
.787

312/-
83.6
248
.78

371/-
99.4
295
.742

402/-
108
319
.67

405/-
109
321
.579

412/-
110
327
.515

415/-
111
329
.461

418/-
112
332
.418

348
-
-
.441

Chevy / GM SB2.2 NASCAR '05 - Darin Morgan Alum

N/A

2.18/-
4.185

145/-

225/-
60.3
179
.75

300/-
80.4
238
.75

375/-
100
298
.75

415/-
111
329
.692

426/-
114
338
.609

443/-
119
352
.554

451/-
121
358
.501

453/-
121
360
.453

359
-
-
.441

Chevy / GM SB2.2 Darin Morgan Alum

N/A

2.20/-
4.20

152/-

226/-
59.5
176
.747

305/-
80.2
238
.756

375/-
98.6
292
.743

418/-
110
326
.69

429/-
113
334
.607

446/-
117
348
.552

453/-
119
353
.499

456/-
120
355
.452

362
-
-
.446

Chevy / GM SB2.2 Comp Elim - Darin Morgan Alum

N/A

2.07/-
4.00

29.5

136/-

227/-
67.5
200
.797

287/-
85.3
253
.756

348/-
103
306
.733

360/-
107
317
.632

371/-
110
327
.558

382/-
114
336
.503

384/-
114
338
.449

388/-
115
342
.409

320
-
-
.419

Chevy / GM SB2.2 CNC RFD Alum

N/A

2.20/1.58

N/A

64/61
95.3%

140/115
82.1%

228/159
69.7%
60/81.1
178/240
.753/.731

312/198
63.5%
82.1/101
243/299
.773/.683

368/229
62.2%
96.8/117
287/346
.729/.632

402/253
62.9%
106/129
313/382
.664/.582

418/265
63.4%
110/135
326/400
.592/.522

429/276
64.3%
113/141
334/417
.531/.476

436/283
64.9%
115/144
340/428
.48/.434

342/222
65.1%
-
.446/.320

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy / GM SB2.2 CNC RFD Alum

N/A

2.20/1.58

156/109
69.9%

240/145
60.4%
63.1/74
187/219
.793/.667

322/200
62.1%
84.7/102
251/302
.798/.69

376/231
61.4%
98.9/118
293/349
.745/.638

417/262
62.8%
110/134
325/396
.689/.603

422/273
64.7%
111/139
329/413
.597/.538

441/280
63.5%
116/143
344/423
.546/.483

453/282
62.3%
119/144
353/426
.499/.432

353/223
63%
-
.446/.320

Chevy / GM ROx 667 Weld Tech Alum

288/-

2.18/1.61

147/119
81%

224/174
77.7%
60/85.5
178/253
.747/.785

293/213
72.7%
78.5/105
233/310
.733/.721

336/241
71.7%
90/118
267/351
.672/.653

373/254
68.1%
99.9/125
296/370
.622/.573

382/262
68.6%
102/129
303/381
.546/.507

386/265
68.7%
103/130
306/386
.483/.449

306/218
71.4%
1.34
.441/.326

Chevy / GM RO7 - Darin Morgan SF600 Alum

N/A

2.18/-

N/A

143/-

221/-
59.2
175
.737

307/-
82.2
244
.768

372/-
99.7
295
.744

408/-
109
324
.68

428/-
115
340
.611

446/-
119
354
.558

453/-
121
360
.503

459/-
123
364
.459

360
-
-
.441

AeroHead Iron CHP

178/70

1.94/1.50

60/48
80%

116/101
87.1%

162/141
87%
54.8/79.8
162/236
.607/.683

219/171
78.1%
74.1/96.8
220/287
.615/.621

225/185
82.2%
76.1/105
226/310
.506/.538

226/188
83.2%
76.5/106
227/315
.423/.455

190/157
82.9%
1.27/2.69
.393/.304

AFR 180 Street Old SF600 Alum

180/-

2.02/1.60
4.06
1 3/4" Pipe

68-74

129/108
83.7%

195/156
80%
60.8/77.6
180/230
.702/.709

240/178
74.2%
74.9/88.5
222/262
.648/.606

255/190
74.5%
79.6/94.5
236/280
.55/.518

260/194
74.6%
81.1/96.5
240/286
.468/.441

216/165
76.6%
1.44
.409/.324

AFR 180 Comp Old SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

144/102
70.8%

206/152
73.8%
64.3/75.6
190/224
.741/.69

245/190
77.6%
76.4/94.5
227/280
.661/.647

260/204
78.5%
81.1/101
240/301
.561/.556

268/211
78.7%
83.6/105
248/311
.482/.479

225/172
76.5%
-
.409/.324

AFR 180 Street SF600 Alum

180/-

2.02/1.60
4.06
1 3/4" Pipe

65-75

138/110
79.7%

198/158
79.8%
61.8/78.6
183/233
.712/.718

240/190
79.2%
74.9/94.5
222/280
.648/.647

260/207
79.6%
81.1/103
240/305
.561/.564

209/166
79.5%
1.44
.409/.324

AFR 180 Comp SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

65-75

142/115
81%

203/165
81.3%
63.3/82.1
188/243
.73/.749

247/200
81%
77.1/99.5
228/295
.666/.681

270/217
80.4%
84.3/108
250/320
.583/.591

216/174
80.9%
-
.409/.324

AFR 190 Alum CCM

N/A

2.02/1.60

N/A

71/67
94.4%

144/121
84%

208/157
75.5%
64.9/78.1
192/231
.748/.713

244/188
77%
76.1/93.5
226/277
.658/.64

262/202
77.1%
81.8/100
242/298
.566/.551

261/211
80.8%
81.4/105
241/311
.469/.479

224/176
78.6%
-
.409/.324

AFR 190 Vortec Alum

190/64

2.02/1.60
4.06
1 3/4" Pipe

135/110
81.5%

213/158
74.2%
66.5/78.6
197/233
.766/.718

253/190
75.1%
78.9/94.5
234/280
.683/.647

276/207
75%
86.1/103
255/305
.596/.564

219/166
75.8%
1.45/3.23
.409/.324

AFR 190 Street SF600 Alum

190/64

2.02/1.60
-
No Pipe

68-74

129/108
83.7%

195/156
80%
60.8/77.6
180/230
.702/.709

240/178
74.2%
74.9/88.5
222/262
.648/.606

260/190
73.1%
81.1/94.5
240/280
.561/.518

262/194
74%
81.8/96.5
242/286
.471/.441

217/165
76.1%
1.38/3.03
.409/.324

AFR 190 Comp SF600 Alum

N/A

2.02/1.60

135/110
81.5%

201/157
78.1%
62.7/78.1
186/231
.723/.713

243/180
74.1%
75.8/89.5
225/265
.656/.613

264/195
73.9%
82.4/97
244/287
.57/.531

276/208
75.4%
86.1/103
255/307
.496/.472

224/170
76%
-
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR 195 OLD Out of Box Weingartner Racing Alum

195/-

2.02/1.60
4.125
No Pipe

N/A

73/53
72.6%

146/108
74%

210/150
71.4%
65.5/74.6
194/221
.756/.681

258/176
68.2%
80.5/87.5
239/259
.696/.60

279/186
66.7%
87.1/92.5
258/274
.602/.507

273/191
70%
85.2/95
252/281
.491/.434

275/192
69.8%
85.8/95.5
254/283
.424/.374

279/193
69.2%
87.1/96
258/284
.376/.329

246/171
69.5%
1.43
.409/.324

AFR 195 Street SF600 Alum

195/64

2.02/1.60
4.06
1 3/4" Pipe

68-74

132/108
81.8%

198/156
78.8%
61.8/77.6
183/230
.712/.709

240/178
74.2%
74.9/88.5
222/262
.648/.606

260/190
73.1%
81.1/94.5
240/280
.561/.518

262/194
74%
81.8/96.5
242/286
.471/.441

218/165
75.6%
1.34/3.03
.409/.324

AFR 195 Comp SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

135/110
81.5%

201/157
78.1%
62.7/78.1
186/231
.723/.713

249/180
72.3%
77.7/89.5
230/265
.672/.613

275/195
70.9%
85.8/97
254/287
.594/.531

280/208
74.3%
87.4/103
259/307
.504/.472

228/170
74.6%
-
.409/.324

AFR 195 Eliminator Street SF600 Alum

195/-

2.05/1.60

137/110
80.3%

194/158
81.4%
58.8/78.6
174/233
.688/.718

240/190
79.2%
72.7/94.5
215/280
.638/.647

270/207
76.7%
81.8/103
242/305
.574/.564

286/215
75.2%
86.6/107
257/317
.507/.488

225/176
78.1%
1.47
.415/.324

AFR 195 Eliminator David Vizard Alum

195/65

2.05/1.60

75/57
76%

139/113
81.3%

198/160
80.8%
60/79.6
178/236
.702/.727

250/190
76%
75.7/94.5
224/280
.665/.647

277/207
74.7%
83.9/103
249/305
.589/.564

292/216
74%
88.5/107
262/318
.518/.491

295/220
74.6%
89.4/109
265/324
.448/.428

242/184
76.2%
1.51/3.38
.415/.324

AFR 195 Eliminator Comp SF600 Alum

195/-

2.08/1.60

140/115
82.1%

202/165
81.7%
59.4/82.1
176/243
.706/.749

248/200
80.6%
73/99.5
216/295
.65/.681

280/217
77.5%
82.4/108
244/320
.587/.591

300/225
75%
88.3/112
262/332
.524/.511

234/184
78.8%
1.54
.421/.324

AFR 195 Eliminator Comp Out of Box Hemphill Racing SF600 Alum

195/-

2.08/1.60
4.04
No Pipe

65/53
81.5%

150/116
77.3%

211/175
82.9%
62.1/87
184/258
.737/.795

255/208
81.6%
75/103
222/307
.668/.709

285/219
76.8%
83.9/109
249/323
.597/.597

305/219
71.8%
89.8/109
266/323
.533/.497

241/187
77.7%
1.56
.421/.324

AFR 195 Eliminator Street V2 SF600 Alum

195/64

2.05/1.60
4.06
1 3/4" Pipe

55/65

146/119
81.5%

201/166
82.6%
60.9/82.6
180/245
.713/.754

247/197
79.8%
74.8/98
222/290
.657/.671

275/213
77.5%
83.3/106
247/314
.585/.58

217/174
80%
1.41/3.33
.415/.324

AFR 195 Eliminator Comp V2 SF600 Alum

195/64

2.08/1.60
4.06
1 3/4" Pipe

65/75

151/125
82.8%

211/172
81.5%
62.1/85.5
184/253
.737/.781

260/207
79.6%
76.5/103
227/305
.681/.705

293/224
76.5%
86.2/111
255/330
.614/.61

308/233
75.6%
90.6/116
269/343
.538/.529

245/192
78.6%
1.58/3.64
.421/.324

AFR 210 Eliminator #1103 Chad Speier Alum

N/A

2.08/-
4.155

N/A

141/-

200/-
58.9
174
.699

249/-
73.3
217
.652

285/-
83.9
249
.597

300/-
88.3
262
.524

294/-
86.5
256
.44

290/-
85.3
253
.38

251
-
-
.421

AFR 210 Eliminator Dr Js Performance Alum

N/A

2.10/1.625
-
1 3/4" Pipe

N/A

70/57
81.4%

147/112
76.2%

201/157
78.1%
58/75.7
172/224
.696/.702

245/190
77.6%
70.7/91.6
210/271
.636/.637

266/201
75.6%
76.8/96.9
228/287
.552/.539

267/206
77.2%
77.1/99.3
228/294
.462/.461

267/210
78.7%
77.1/101
228/300
.396/.402

232/179
77.2%
-
.425/.329

AFR 210 Eliminator CNC Dr Js Performance Alum

N/A

2.10/1.625
-
1 3/4" Pipe

N/A

76/58
76.3%

148/117
79.1%

203/165
81.3%
58.6/79.6
174/236
.703/.738

252/210
83.3%
72.8/101
216/300
.654/.704

286/234
81.8%
82.6/113
245/334
.594/.628

304/250
82.2%
87.8/121
260/357
.526/.559

315/258
81.9%
90.9/124
269/369
.467/.494

251/206
81.8%
-
.425/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR 210 Race Old SF600 Alum

210/80

2.08/1.60
4.125
1 7/8" Pipe

135/112
83%

197/145
73.6%
58/72.1
172/214
.688/.659

245/185
75.5%
72.1/92
214/273
.642/.63

273/205
75.1%
80.3/102
238/302
.572/.559

282/215
76.2%
83/107
246/317
.493/.488

285/220
77.2%
83.9/109
249/324
.427/.428

236/180
76.4%
1.36/2.75
.421/.324

AFR 210 Race Old Meaux Racing Alum

N/A

2.08/1.60
-
No Pipe

N/A

140/110
78.6%

198/152
76.8%
58.3/75.6
173/224
.692/.69

247/178
72.1%
72.7/88.5
215/262
.647/.606

284/192
67.6%
83.6/95.5
248/283
.595/.523

289/197
68.2%
85.1/98
252/290
.505/.447

296/201
67.9%
87.1/100
258/296
.443/.391

294/203
69%
86.5/101
256/299
.385/.346

250/176
70.5%
-
.421/.324

AFR 210 Race Old Ported Meaux Racing Alum

N/A

2.08/1.60
-
No Pipe

N/A

161/119
73.9%

218/159
72.9%
64.2/79.1
190/234
.762/.722

262/188
71.8%
77.1/93.5
228/277
.687/.64

293/203
69.3%
86.2/101
255/299
.614/.553

307/208
67.8%
90.3/103
268/307
.536/.472

312/213
68.3%
91.8/106
272/314
.467/.415

315/215
68.3%
92.7/107
275/317
.413/.366

316/216
68.4%
93/107
276/318
.368/.327

273/190
69.6%
-
.421/.324

AFR 210 Street SF600 Alum

210/80

2.08/1.60
4.125
1 7/8" Pipe

139/110
79.1%

199/158
79.4%
58.6/78.6
174/233
.695/.718

249/192
77.1%
73.3/95.5
217/283
.652/.654

279/210
75.3%
82.1/104
243/309
.585/.572

295/220
74.6%
86.8/109
257/324
.515/.50

301/224
74.4%
88.6/111
262/330
.451/.436

244/186
76.2%
1.43/2.80
.421/.324

AFR 210 Comp SF600 Alum

210/80

2.08/1.60
4.125
1 7/8" Pipe

147/120
81.6%

206/166
80.6%
60.6/82.6
180/245
.72/.754

257/214
83.3%
75.6/106
224/315
.673/.729

290/225
77.6%
85.3/112
253/332
.608/.613

308/235
76.3%
90.6/117
269/346
.538/.534

312/240
76.9%
91.8/119
272/354
.467/.467

253/200
78.9%
1.49/3.00
.421/.324

AFR 210 CNC Meaux Racing Out of Box Alum

210/80

2.08/1.60
4.00
No Pipe

N/A

130/115
88.5%

185/154
83.2%
54.4/76.6
161/227
.646/.699

233/182
78.1%
68.6/90.5
203/268
.611/.62

270/196
72.6%
79.5/97.5
235/289
.566/.534

280/205
73.2%
82.4/102
244/302
.489/.466

284/212
74.6%
83.6/105
248/312
.425/.413

283/216
76.3%
83.3/107
247/318
.371/.368

238/183
76.9%
1.35/2.70
.421/.324

AFR 210 CNC Out of Box Alum

210/80

2.08/1.60

N/A

144/118
81.9%

202/167
82.7%
59.4/83.1
176/246
.706/.759

249/198
79.5%
73.3/98.5
217/292
.652/.675

278/207
74.5%
81.8/103
242/305
.583/.564

284/210
73.9%
83.6/104
248/309
.496/.477

280/212
75.7%
82.4/105
244/312
.419/.413

240/185
77.4%
1.35/2.65
.421/.324

AFR 210 CNC Out of Box Weingartner Racing Alum

210/-

2.08/1.60
4.125
No Pipe

N/A

70/55
78.6%

140/111
79.3%

199/150
75.4%
58.6/74.6
174/221
.695/.681

248/185
74.6%
73/92
216/273
.65/.63

276/206
74.6%
81.2/102
241/304
.579/.561

282/216
76.6%
83/107
246/318
.493/.491

291/221
75.9%
85.6/110
254/326
.436/.43

289/224
77.5%
85.1/111
252/330
.379/.382

246/188
76.1%
1.39
.421/.324

AFR 210 massaged Chad Speier Alum

208/-

2.08/1.6125

161/119
73.9%

218/159
72.9%
64.2/77.9
190/231
.762/.717

262/188
71.8%
77.1/92.1
228/273
.687/.635

293/203
69.3%
86.2/99.4
255/295
.614/.549

307/208
67.8%
90.3/102
268/302
.536/.469

312/213
68.3%
91.8/104
272/309
.467/.411

315/215
68.3%
92.7/105
275/312
.413/.363

316/216
68.4%
93/106
276/313
.368/.324

273/190
69.6%
1.52
.421/.327

AFR 210 Race V2 SF600 Alum

210/80

2.08/1.60
4.06
1 3/4" Pipe

65-75

145/110
75.9%

199/158
79.4%
58.6/78.6
174/233
.695/.718

255/192
75.3%
75/95.5
222/283
.668/.654

292/210
71.9%
85.9/104
255/309
.612/.572

309/220
71.2%
90.9/109
269/324
.54/.50

240/178
74.2%
1.47/2.75
.421/.324

AFR 210 Comp V2 SF600 Alum

210/80

2.08/1.60
4.06
1 3/4" Pipe

65-75

147/120
81.6%

201/166
82.6%
59.2/82.6
175/245
.702/.754

257/214
83.3%
75.6/106
224/315
.673/.729

296/225
76%
87.1/112
258/332
.621/.613

318/235
73.9%
93.6/117
277/346
.556/.534

244/192
78.8%
1.51/2.94
.421/.324

AFR 220 Race SF600 Alum

220/80

2.08/1.60
4.125
1 7/8" Pipe

132/112
84.8%

190/145
76.3%
55.9/72.1
166/214
.664/.659

248/185
74.6%
73/92
216/273
.65/.63

280/205
73.2%
82.4/102
244/302
.587/.559

286/215
75.2%
84.2/107
249/317
.50/.488

292/220
75.3%
85.9/109
255/324
.437/.428

238/180
75.8%
1.33/2.75
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR 220 Comp SF600 Alum

220/80

2.08/1.60
4.125
1 7/8" Pipe

135/112
83%

198/150
75.8%
58.3/74.6
173/221
.692/.681

255/190
74.5%
75/94.5
222/280
.668/.647

290/207
71.4%
85.3/103
253/305
.608/.564

298/220
73.8%
87.7/109
260/324
.521/.50

303/230
75.9%
89.2/114
264/339
.454/.448

247/185
75%
1.38/2.88
.421/.324

AFR 220 Eliminator Comp SF600 Alum

220/-

2.10/1.60

150/126
84%

207/178
86%
59.8/88.5
177/262
.716/.808

260/215
82.7%
75.1/107
222/317
.675/.732

296/236
79.7%
85.5/117
253/348
.615/.643

322/247
76.7%
93/123
275/364
.557/.561

331/251
75.8%
95.6/125
283/370
.491/.489

261/209
80%
1.50
.425/.324

AFR 220 Eliminator Comp Out of Box Meaux Racing SF600 Alum

220/-

2.10/1.60
4.125
No Pipe

N/A

145/117
80.7%

195/171
87.7%
56.3/85
167/252
.675/.777

244/207
84.8%
70.4/103
209/305
.633/.705

283/223
78.8%
81.7/111
242/329
.588/.608

303/230
75.9%
87.5/114
259/339
.524/.522

304/233
76.6%
87.8/116
260/343
.451/.454

303/235
77.6%
87.5/117
259/346
.393/.40

254/202
79.7%
1.38
.425/.324

AFR 220 Eliminator Race Alum

220/-

2.10/1.60
4.125
1 7/8" Pipe

65-75

155/116
74.8%

210/162
77.1%
60.6/80.6
180/239
.727/.736

260/204
78.5%
75.1/101
222/301
.675/.695

295/220
74.6%
85.2/109
252/324
.613/.60

312/229
73.4%
90.1/114
267/337
.54/.52

246/186
75.6%
1.42
.425/.324

AFR 220 Eliminator Comp Alum

220/-

2.10/1.60
4.125
1 7/8" Pipe

65-75

145/120
82.8%

207/166
80.2%
59.8/82.6
177/245
.716/.754

263/214
81.4%
75.9/106
225/315
.683/.729

299/225
75.3%
86.3/112
256/332
.621/.613

324/240
74.1%
93.5/119
277/354
.561/.545

329/245
74.5%
95/122
281/361
.488/.477

261/202
77.2%
1.50
.425/.324

AFR 227 Race Old SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

135/112
83%

192/145
75.5%
55.4/72.1
164/214
.664/.659

250/185
74%
72.2/92
214/273
.649/.63

288/205
71.2%
83.2/102
246/302
.598/.559

292/215
73.6%
84.3/107
250/317
.505/.488

295/220
74.6%
85.2/109
252/324
.438/.428

242/180
74.5%
1.30/2.75
.425/.324

AFR 227 Comp Old SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

138/112
81.2%

207/150
72.5%
59.8/74.6
177/221
.716/.681

258/190
73.6%
74.5/94.5
221/280
.67/.647

294/207
70.4%
84.9/103
252/305
.61/.564

302/220
72.8%
87.2/109
258/324
.523/.50

309/230
74.4%
89.2/114
264/339
.458/.448

251/185
73.5%
1.36/2.88
.425/.324

AFR 227 Street 60/40 SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

148/114
77%

210/162
77.1%
60.6/80.6
180/239
.727/.736

259/204
78.8%
74.8/101
222/301
.672/.695

292/220
75.3%
84.3/109
250/324
.606/.60

305/229
75.1%
88.1/114
261/337
.528/.52

243/186
76.5%
1.34/2.86
.425/.324

AFR 227 Comp 60/40 SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

153/120
78.4%

214/167
78%
61.8/83.1
183/246
.741/.759

265/214
80.8%
76.5/106
227/315
.688/.729

298/230
77.2%
86/114
255/339
.619/.627

315/238
75.6%
90.9/118
269/351
.545/.541

249/194
77.8%
1.39/2.98
.425/.324

AFR 227 Comp 60/40 Out of Box Alum

N/A

2.10/1.60
-
No Pipe

N/A

154/114
74%

208/165
79.3%
60.1/82.1
178/243
.72/.749

264/205
77.7%
76.2/102
226/302
.685/.698

304/223
73.4%
87.8/111
260/329
.631/.608

325/232
71.4%
93.8/115
278/342
.562/.527

251/188
74.8%
-
.425/.324

AFR 227 Eliminator CNC Out of Box Weingartner Racing Alum

210/-

2.10/1.60
4.125
No Pipe

N/A

75/61
81.3%

160/123
76.9%

217/170
78.3%
62.7/84.6
186/251
.751/.772

269/208
77.3%
77.7/103
230/307
.698/.709

303/220
72.6%
87.5/109
259/324
.629/.60

322/227
70.5%
93/113
275/335
.557/.516

321/233
72.6%
92.7/116
275/343
.476/.454

322/234
72.7%
93/116
275/345
.418/.399

273/202
73.9%
1.53
.425/.324

AFR 227 Street 60/40 V2 SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

65-75

148/114
77%

210/162
77.1%
60.6/80.6
180/239
.727/.736

261/204
78.2%
75.4/101
223/301
.677/.695

296/220
74.3%
85.5/109
253/324
.615/.60

312/229
73.4%
90.1/114
267/337
.54/.52

318/237
74.5%
91.8/118
272/349
.472/.461

258/194
75.5%
1.40/2.96
.425/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR 227 Comp 60/40 V2 SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

65-75

152/120
78.9%

212/167
78.8%
61.2/83.1
181/246
.734/.759

265/214
80.8%
76.5/106
227/315
.688/.729

300/230
76.7%
86.6/114
257/339
.623/.627

319/238
74.6%
92.1/118
273/351
.552/.541

327/243
74.3%
94.4/121
280/358
.485/.473

263/202
77%
1.44/3.04
.425/.324

AFR 235 Eliminator CNC 60/40 SF600 Alum

235/-

2.125/1.60
4.125
1 7/8" Pipe

70-80

159/120
75.5%

221/175
79.2%
62.3/87
185/258
.756/.795

270/214
79.3%
76.1/106
226/315
.693/.729

305/235
77%
86/117
255/346
.626/.64

324/247
76.2%
91.4/123
271/364
.554/.561

334/254
76%
94.2/126
279/374
.49/.494

340/256
75.3%
95.9/127
284/377
.436/.436

279/214
76.9%
1.45
.430/.324

AFR 235 Eliminator CNC Out of Box Weingartner Racing Alum

235/-

2.125/1.60
4.125
No Pipe

79/58
73.4%

169/117
69.2%

236/172
72.9%
66.5/85.5
197/253
.807/.781

274/205
74.8%
77.3/102
229/302
.703/.698

306/221
72.2%
86.3/110
256/326
.628/.602

322/231
71.7%
90.8/115
269/340
.551/.525

333/237
71.2%
93.9/118
278/349
.488/.461

339/241
71.1%
95.6/120
283/355
.435/.41

341/245
71.8%
96.1/122
285/361
.389/.371

290/209
71.9%
1.45
.430/.324

AFR 235 Out of Box Dr Js Perfomance Alum

235/-

2.125/1.60
4.155

66/-

144/-

209/-
58.9
175
.715

259/-
73
216
.664

290/-
81.8
242
.595

312/-
88
261
.534

323/-
91.1
270
.473

329/-
92.8
275
.422

327/-
92.2
273
.373

319/-
89.9
267
.327

279
-
1.40
.430/.324

AFR 235 Out of Box CHW Alum

235/-

2.125/1.60
-
No Pipe

N/A

72/58
80.6%

162/110
67.9%

216/167
77.3%
60.9/83.1
180/246
.739/.759

260/185
71.2%
73.3/92
217/273
.667/.63

292/205
70.2%
82.3/102
244/302
.599/.559

308/216
70.1%
86.8/107
257/318
.527/.491

319/221
69.3%
89.9/110
267/326
.468/.43

327/224
68.5%
92.2/111
273/330
.419/.382

269/190
70.5%
1.39
.430/.324

AFR 23 Deg 215 RR SF600 Alum

215/80

2.10/1.60
4.125
1 7/8" Pipe

150/112
74.7%

220/150
68.2%
63.5/74.6
188/221
.761/.681

276/190
68.8%
79.7/94.5
236/280
.716/.647

308/207
67.2%
88.9/103
263/305
.64/.564

315/220
69.8%
90.9/109
269/324
.545/.50

325/230
70.8%
93.8/114
278/339
.482/.448

266/185
69.6%
1.51/2.88
.425/.324

AFR 245 CNC Alum

245/-

2.125/1.60

N/A

165/120
72.7%

232/175
75.4%
65.4/87
194/258
.793/.795

278/214
77%
78.4/106
232/315
.713/.729

310/235
75.8%
87.4/117
259/346
.636/.64

330/247
74.8%
93/123
276/364
.564/.561

341/252
73.9%
96.1/125
285/371
.50/.491

276/207
75.1%
1.39
.430/.324

AFR 245 Eliminator CNC Alum

245/-

2.125/1.60
4.125
1 7/8" Pipe

70-80

165/128
77.6%

232/181
78%
65.4/90
194/267
.793/.822

278/214
77%
78.4/106
232/315
.713/.729

310/235
75.8%
87.4/117
259/346
.636/.64

330/247
74.8%
93/123
276/364
.564/.561

341/254
74.5%
96.1/126
285/374
.50/.494

350/256
73.1%
98.7/127
292/377
.449/.436

287/216
75.5%
1.43
.430/.324

AFR 18 Deg GM SF600

243/100

147/109
74.1%

219/160
73.1%
-

273/204
74.7%
-

319/230
72.1%
-

329/246
74.8%
-

340/255
75%
-

271/201
74%
1.40/2.55

AFR 285 15 Deg Alum

285/-

2.16/1.60

50-53

-
-
-
.437/.324

AFR 305 15 Deg I-55 E-55 Alum

305/-

2.20/1.60

50-53

-
-
-
.446/.324

AFR 325 13.5 Deg Alum

325/-

2.236/1.595
-
1 7/8" Pipe

141/114
80.9%

211/160
75.8%
53.7/80.1
159/237
.686/.729

286/196
68.5%
72.8/98.1
216/291
.697/.67

347/225
64.8%
88.4/113
262/334
.677/.615

398/253
63.6%
101/127
300/375
.647/.576

438/276
63%
112/138
330/409
.61/.539

452/298
65.9%
115/149
341/442
.551/.509

453/309
68.2%
115/155
342/458
.491/.469

341/229
67.2%
1.39
.453/.323

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AJPE 23 Deg 250

250/-

2.15/1.525
4.03
No Pipe

148/106
71.6%

221/153
69.2%
60.9/83.8
180/248
.747/.729

281/193
68.7%
77.4/106
229/313
.712/.69

318/223
70.1%
87.6/122
260/362
.645/.638

328/232
70.7%
90.3/127
268/376
.554/.553

336/238
70.8%
92.5/130
274/386
.487/.486

347/-
95.6
283
.44

283/191
-
1.39
.435/.309

AJPE 23 Deg 283

283/-

2.18/1.60
4.125
No Pipe

142/103
72.5%

221/143
64.7%
59.2/71.1
175/211
.737/.65

281/205
73%
75.3/102
223/302
.703/.698

325/222
68.3%
87.1/110
258/327
.65/.605

347/230
66.3%
93/114
275/339
.578/.522

364/238
65.4%
97.5/118
289/351
.52/.463

369/248
67.2%
98.9/123
293/365
.461/.422

374/-
100
297
.416

303/198
-
1.32
.441/.324

AJPE 18 Deg 250

250/-

2.125/1.60
4.03
No Pipe

N/A

145/114
78.6%

216/164
75.9%
60.9/81.6
180/242
.739/.745

267/217
81.3%
75.3/108
223/320
.685/.739

303/243
80.2%
85.4/121
253/358
.622/.662

325/251
77.2%
91.6/125
272/370
.556/.57

336/255
75.9%
94.7/127
281/376
.492/.496

265/207
78.1%
1.34
.430/.324

AJPE 18 Deg 270

270/-

2.18/1.60
4.125
No Pipe

N/A

148/114
77%

225/164
72.9%
60.3/81.6
179/242
.75/.745

275/217
78.9%
73.7/108
218/320
.688/.739

314/243
77.4%
84.1/121
249/358
.628/.662

352/251
71.3%
94.3/125
279/370
.587/.57

356/255
71.6%
95.4/127
283/376
.509/.496

278/207
74.5%
1.32
.441/.324

AJPE 18 Deg 279

279/-

2.20/1.625
4.125
No Pipe

N/A

143/111
77.6%

223/166
74.4%
58.7/80
174/237
.737/.742

278/225
80.9%
73.1/108
217/321
.689/.755

319/245
76.8%
83.9/118
249/350
.632/.657

353/255
72.2%
92.9/123
275/364
.583/.57

368/260
70.7%
96.8/125
287/371
.521/.498

281/210
74.9%
1.32
.446/.329

AJPE 12 Deg 280 Weingarter Racing Brez

280/-

2.10/1.625
4.155
No Pipe

N/A

68/46
67.6%

129/78
60.5%

201/123
61.2%
58/59.3
172/176
.696/.55

272/167
61.4%
78.5/80.5
233/239
.706/.56

323/195
60.4%
93.3/94
276/279
.671/.523

354/216
61%
102/104
303/309
.613/.483

358/231
64.5%
103/111
306/330
.531/.443

359/240
66.9%
104/116
307/343
.466/.402

285/179
62.6%
1.28
.425/.329

AJPE 13 Deg Canted Valves Billet

344/114

2.25/1.65
4.125
2.1" Pipe

125/105
84%

196/159
81.1%
49.3/74.4
146/220
.633/.70

268/216
80.6%
67.4/101
200/299
.649/.714

326/255
78.2%
82/119
243/353
.632/.674

375/284
75.7%
94.3/133
279/394
.606/.625

410/305
74.4%
103/143
306/423
.568/.576

420/319
76%
106/149
313/442
.509/.527

303/235
77.5%
1.22/2.80
.456/.334

All PRO II-13 Ported Jones Engineering Alum

N/A

2.20/1.625

N/A

165/124
75.2%

245/204
83.3%
64.5/98.4
191/291
.809/.912

299/248
82.9%
78.7/120
233/354
.741/.832

343/272
79.3%
90.2/131
267/389
.68/.73

364/278
76.4%
95.8/134
284/397
.601/.622

386/292
75.6%
102/141
301/417
.546/.56

300/236
78.7%
-
.446/.329

All PRO RE-18 Ported Rons Porting Servive Alum

274/-

2.15/1.625

42-57

165/128
77.6%

239/183
76.6%
65.8/88.2
195/261
.808/.818

290/236
81.4%
79.9/114
237/337
.735/.792

318/268
84.3%
87.6/129
260/383
.645/.719

341/274
80.4%
93.9/132
278/391
.576/.613

354/280
79.1%
97.5/135
289/400
.513/.537

285/228
80.2%
1.29
.435/.329

All PRO RE-15 Ported Alum

N/A

2.19/1.60

N/A

164/128
78%

228/211
92.5%
60.5/105
179/311
.757/.958

281/247
87.9%
74.6/123
221/364
.699/.841

327/268
82%
86.8/133
257/395
.651/.73

353/278
78.8%
93.7/138
278/410
.586/.631

369/282
76.4%
98/140
290/416
.525/.549

287/236
82.1%
-
.443/.324

All PRO LM-13 Deg Ported Alum

270/-

2.18/1.60

35-50

155/120
77.4%

232/180
77.6%
62.2/89.5
184/265
.773/.818

296/230
77.7%
79.3/114
235/339
.74/.784

340/246
72.4%
91.1/122
270/363
.68/.67

362/255
70.4%
97/127
287/376
.603/.579

372/263
70.7%
99.7/131
295/388
.531/.512

293/216
73.6%
1.38
.441/.324

All PRO LM-13 Deg Ported Alum

278/-

2.18/1.625

35-50

150/124
82.7%

232/204
87.9%
62.2/98.4
184/291
.773/.912

298/248
83.2%
79.8/120
237/354
.745/.832

342/272
79.5%
91.6/131
271/389
.684/.73

367/278
75.7%
98.3/134
291/397
.612/.622

378/292
77.2%
101/141
300/417
.54/.56

295/236
80.2%
1.36
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

All PRO 13 Deg CNC MBE Sprint Car Alum

N/A

68/47
69.1%

135/96
71.1%

211/152
72%
-

290/202
69.7%
-

344/239
69.5%
-

382/259
67.8%
-

397/271
68.3%
-

406/278
68.5%
-

413/280
67.8%
-

420/281
66.9%
-

333/229
68.6%

All PRO 13 Deg CNC Jones Engineering Alum

282/-

2.18/1.625

147/112
76.2%

232/164
70.7%
62.2/79.1
184/234
.773/.733

306/223
72.9%
82/108
243/319
.765/.748

351/246
70.1%
94/119
279/351
.702/.66

386/252
65.3%
103/122
306/360
.643/.563

392/258
65.8%
105/124
311/369
.56/.494

302/209
69.2%
1.39
.441/.329

All PRO 13 Deg CNC Jones Engineering Alum

292/-

2.20/1.60

150/113
75.3%

228/164
71.9%
60/81.6
178/242
.753/.745

290/219
75.5%
76.3/109
226/323
.718/.746

339/246
72.6%
89.2/122
264/363
.672/.67

374/256
68.4%
98.4/127
292/377
.618/.581

391/262
67%
103/130
305/386
.554/.51

396/266
67.2%
104/132
309/392
.491/.453

310/218
70.4%
1.36
.446/.324

All PRO 305-4 13 Ported Alum

305/-

2.25/1.60

N/A

159/115
72.3%

223/192
86.1%
56.1/95.5
166/283
.72/.872

284/239
84.2%
71.4/119
212/352
.688/.814

343/261
76.1%
86.3/130
256/385
.665/.711

382/275
72%
96.1/137
285/405
.617/.625

404/283
70%
102/141
301/417
.559/.551

414/287
69.3%
104/143
309/423
.501/.489

316/236
74.8%
1.36
.456/.324

All PRO 13.5 Deg CNC Jones Engineering Alum

306/-

2.23/1.60

138/117
84.8%

213/169
79.3%
54.5/84.1
162/249
.694/.768

279/218
78.1%
71.4/108
212/321
.682/.743

333/246
73.9%
85.3/122
253/363
.651/.67

383/258
67.4%
98.1/128
291/380
.624/.586

410/265
64.6%
105/132
311/391
.573/.516

418/268
64.1%
107/133
317/395
.511/.456

311/220
70.9%
1.37
.452/.324

All PRO 272 22 Deg Ported Jones Engineering Alum

278/-

2.18/1.60

149/118
79.2%

217/172
79.3%
58.1/85.5
172/253
.723/.781

276/221
80.1%
73.9/110
219/326
.69/.753

321/239
74.5%
86/119
255/352
.642/.651

357/246
68.9%
95.6/122
283/363
.595/.559

371/251
67.7%
99.4/125
295/370
.53/.489

282/208
73.7%
1.33
.441/.324

All PRO 23 Deg Ported Alum

219/-

2.10/1.60

60-74

151/109
72.2%

219/165
75.3%
63.2/82.1
187/243
.758/.749

266/221
83.1%
76.8/110
228/326
.69/.753

288/243
84.4%
83.2/121
246/358
.598/.662

308/250
81.2%
88.9/124
263/368
.533/.568

314/253
80.6%
90.7/126
269/373
.466/.492

258/207
80.3%
1.43
.425/.324

All PRO 23 Deg Ported Jones Engineering Alum

242/-

2.125/1.60

156/108
69.2%

210/169
80.5%
59.2/84.1
175/249
.718/.768

266/216
81.2%
75/107
222/318
.682/.736

311/230
74%
87.7/114
260/339
.638/.627

333/238
71.5%
93.9/118
278/351
.569/.541

340/243
71.5%
95.9/121
284/358
.498/.473

269/201
74.5%
1.40
.430/.324

All PRO 23 Deg Ported Kelford Cams 360 SprintCar Alum

N/A

2.125/1.625

N/A

88/47
53.4%

162/104
64.2%

224/158
70.5%
63.2/76.2
187/226
.766/.707

268/222
82.8%
75.6/107
224/317
.687/.745

300/239
79.7%
84.6/115
251/341
.616/.641

324/247
76.2%
91.4/119
271/353
.554/.552

331/255
77%
93.3/123
277/364
.485/.489

268/204
76.1%
-
.430/.329

All PRO 23 Deg Ported Rons Porting Service Alum

245/-

2.18/1.625

153/123
80.4%

212/172
81.1%
56.8/82.9
168/246
.707/.769

272/210
77.2%
72.9/101
216/300
.68/.704

322/239
74.2%
86.3/115
256/341
.644/.641

358/251
70.1%
95.9/121
284/359
.597/.561

379/258
68.1%
102/124
301/369
.541/.494

382/261
68.3%
102/126
303/373
.478/.438

297/216
72.9%
1.56
.441/.329

All PRO 23 Deg Rolled to 16.8 Deg Ported BES Alum

288/-

2.18/1.625

43.5

114/91
79.8%

205/176
85.9%
54.9/84.9
163/251
.683/.787

268/233
86.9%
71.8/112
213/333
.67/.782

314/262
83.4%
84.1/126
249/374
.628/.703

353/286
81%
94.6/138
280/409
.588/.64

374/302
80.7%
100/146
297/431
.534/.579

381/311
81.6%
102/150
302/444
.476/.522

381/317
83.2%
102/153
302/453
.423/.473

299/247
82.8%
1.32
.441/.329

All PRO 23 Deg RR 245 Ported BES Alum

N/A

2.18/1.625
4.155

N/A

122/112
91.8%

187/165
88.2%
50.1/79.6
148/236
.623/.738

250/218
87.2%
67/105
198/311
.625/.731

301/248
82.4%
80.6/120
239/354
.602/.665

339/264
77.9%
90.8/127
269/377
.565/.59

362/274
75.7%
97/132
287/391
.517/.525

368/279
75.8%
98.6/135
292/399
.46/.468

371/280
75.5%
99.4/135
295/400
.412/.417

288/230
80%
-
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Avenger 180 23 Deg Alum

180/72

2.02/1.60

60/68

64/60
93.8%

128/110
85.9%

178/150
84.3%
55.5/74.6
165/221
.64/.681

227/188
82.8%
70.8/93.5
210/277
.613/.64

258/204
79.1%
80.5/101
239/301
.557/.556

270/215
79.6%
84.3/107
250/317
.486/.488

270/215
79.6%
84.3/107
250/317
.416/.419

270/215
79.6%
84.3/107
250/317
.364/.366

229/185
81%
1.50/2.99
.409/.324

Avenger 190 23 Deg Alum

190/-

2.02/1.60

60/67

64/61
95.3%

128/115
89.8%

181/150
82.9%
56.5/74.6
167/221
.651/.681

227/190
83.7%
70.8/94.5
210/280
.613/.647

260/209
80.4%
81.1/104
240/308
.561/.57

277/227
81.9%
86.4/113
256/335
.498/.516

280/231
82.5%
87.4/115
259/340
.432/.45

280/231
82.5%
87.4/115
259/340
.378/.393

233/193
82.9%
1.47
.409/.324

Avenger 210 23 Deg Alum

210/80

2.055/1.60

60/67

69/61
88.4%

139/115
82.7%

194/150
77.3%
58.5/74.6
173/221
.686/.681

240/190
79.2%
72.4/94.5
214/280
.637/.647

277/209
75.5%
83.5/104
247/308
.588/.57

299/227
75.9%
90.1/113
267/335
.529/.516

304/234
77%
91.7/116
272/345
.461/.456

304/234
77%
91.7/116
272/345
.403/.399

251/194
77.3%
1.45/2.93
.416/.324

Avenger 15 Deg Alum

290/90

2.18/1.60

61/69

79/62
78.5%

159/120
75.5%

223/167
74.9%
59.7/83.1
177/246
.743/.759

290/218
75.2%
77.7/108
230/321
.725/.743

335/232
69.3%
89.8/115
266/342
.67/.632

361/240
66.5%
96.7/119
287/354
.602/.545

372/248
66.7%
99.7/123
295/365
.531/.483

381/255
66.9%
102/127
302/376
.476/.434

303/211
69.8%
1.31/2.83
.441/.324

BMF 18 Deg 238 CNC Alum

238/90

2.15/1.60

241/178
73.9%
66.4/88.5
197/262
.815/.808

299/223
74.6%
82.4/111
244/329
.758/.76

340/236
69.4%
93.7/117
277/348
.69/.643

348/243
69.8%
95.9/121
284/358
.588/.552

350/247
70.6%
96.4/123
286/364
.507/.481

351/250
71.2%
96.7/124
286/368
.445/.426

353/251
71.1%
97.2/125
288/370
.398/.38

326/233
71.3%
1.48/2.79
.435/.324

BMF 18 Deg 248 CNC Alum

248/90

2.15/1.60

239/178
74.5%
65.8/88.5
195/262
.808/.808

302/223
73.8%
83.2/111
246/329
.766/.76

344/236
68.6%
94.8/117
281/348
.698/.643

352/243
69%
97/121
287/358
.595/.552

362/247
68.2%
99.7/123
295/364
.524/.481

365/250
68.5%
101/124
298/368
.463/.426

365/251
68.8%
101/125
298/370
.411/.38

333/233
69.9%
1.47/2.79
.435/.324

BMF 18 Deg 260 CNC Alum

260/90

2.15/1.60

242/178
73.6%
66.7/88.5
198/262
.818/.808

300/223
74.3%
82.6/111
245/329
.761/.76

342/236
69%
94.2/117
279/348
.694/.643

361/243
67.3%
99.4/121
295/358
.61/.552

369/247
66.9%
102/123
301/364
.535/.481

370/250
67.6%
102/124
302/368
.469/.426

370/251
67.8%
102/125
302/370
.417/.38

336/233
69.2%
1.42/2.79
.435/.324

BMF 18 Deg CNC OLD Alum

268/90

2.18/1.60

N/A

145/131
90.3%

208/177
85.1%
55.7/88
165/261
.693/.804

266/215
80.8%
71.3/107
211/317
.665/.732

313/242
77.3%
83.9/120
248/357
.626/.66

338/253
74.9%
90.6/126
268/373
.563/.575

351/260
74.1%
94/129
279/383
.501/.506

368/262
71.2%
98.6/130
292/386
.46/.446

284/220
77.4%
1.37/2.91
.441/.324

BMF 18 Deg 268 CNC Alum

268/90

2.18/1.60

242/178
73.6%
64.8/88.5
192/262
.807/.808

300/223
74.3%
80.4/111
238/329
.75/.76

342/236
69%
91.6/117
271/348
.684/.643

369/243
65.9%
98.9/121
293/358
.615/.552

375/247
65.9%
100/123
298/364
.536/.481

379/250
66%
102/124
301/368
.474/.426

382/251
65.7%
102/125
303/370
.424/.38

341/233
68.1%
1.43/2.79
.441/.324

BMF 18 Deg 268 CNC Out of Box Meaux Racing SF600 Alum

268/90

2.18/1.60
4.125
No Pipe

N/A

149/111
74.5%

218/158
72.5%
58.4/78.6
173/233
.727/.718

272/199
73.2%
72.9/99
216/293
.68/.678

317/229
72.2%
84.9/114
252/337
.634/.624

337/241
71.5%
90.3/120
268/355
.562/.547

339/-
90.8
269
.484

343/-
91.9
272
.429

349/265
75.9%
93.5/132
277/391
.388/.401

291/201
-
1.30/2.94
.441/.324

BMF SBX 4.5 Bore CNC Darin Morgan SF600 Alum

N/A

2.30/1.65
-
No Pipe

N/A

159/-

244/-
58.7
174
.771

319/-
76.8
227
.756

386/-
92.9
275
.732

432/-
104
308
.682

447/-
108
319
.605

463/-
111
330
.549

469/-
113
334
.494

478/-
115
341
.453

377
-
-
.466/.334

Brodix CARB Legal Alum

170/-

2.02/1.60

132/93
70.5%

185/134
72.4%
57.7/66.6
171/197
.666/.609

217/159
73.3%
67.7/79.1
201/234
.586/.542

215/174
80.9%
67.1/86.5
199/256
.464/.474

212/180
84.9%
66.2/89.5
196/265
.381/.409

192/148
77%
1.28
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix 305 Sprint Race Saver Ported Smithberg Racing

N/A

1.94/1.60
3.91
No Pipe

N/A

77/52
67.5%

151/95
62.9%

203/132
65%
68.7/65.7
203/195
.76/.60

219/160
73.1%
74.1/79.6
220/236
.615/.545

234/176
75.2%
79.2/87.5
235/259
.526/.48

239/184
77%
80.9/91.5
240/271
.448/.418

209/149
71.4%
-
.393/.324

Brodix SP CH Alum

215/-

2.08/1.60

121/92
76%

176/134
76.1%
51.8/66.6
153/197
.615/.609

223/158
70.9%
65.6/78.6
194/233
.584/.538

249/172
69.1%
73.3/85.5
217/253
.522/.469

261/179
68.6%
76.8/89
228/264
.456/.407

269/182
67.7%
79.2/90.5
235/268
.403/.354

217/153
70.6%
1.25
.421/.324

Brodix DS 225 23 Deg Alum

225/-

2.08/1.60

N/A

142/115
81%

212/154
72.6%
62.4/76.6
185/227
.741/.699

260/183
70.4%
76.5/91
227/270
.681/.623

287/199
69.3%
84.5/99
250/293
.602/.542

302/204
67.5%
88.9/101
263/301
.528/.463

304/210
69.1%
89.5/104
265/309
.455/.409

251/178
70.7%
1.35
.421/.324

Brodix BP HH 23 Deg 40/60 I-50 E-45 Alum

229/-

2.125/1.60

139/122
87.8%

205/166
81%
57.8/82.6
171/245
.701/.754

257/200
77.8%
72.5/99.5
215/295
.659/.681

300/219
73%
84.6/109
251/323
.616/.597

319/227
71.2%
89.9/113
267/335
.545/.516

325/236
72.6%
91.6/117
272/348
.476/.459

258/195
75.7%
1.42
.430/.324

Brodix BP HH RO 225 23 Deg 40/60 I-52 E-55 Alum

225/-

2.15/1.57

N/A

142/103
72.5%

205/143
69.8%
56.5/73.9
167/219
.693/.662

259/182
70.3%
71.3/94
211/279
.657/.632

303/206
68%
83.5/106
247/315
.615/.572

327/222
67.9%
90.1/115
267/340
.553/.514

335/238
71%
92.3/123
273/364
.485/.472

262/182
69.6%
1.49
.435/.318

Brodix BP HH RO 234 23 Deg 40/60 I-52 E-55 Alum

234/-

2.15/1.57

N/A

130/103
79.2%

199/143
71.9%
54.8/73.9
162/219
.673/.662

258/182
70.5%
71.1/94
211/279
.654/.632

305/206
67.5%
84/106
249/315
.619/.572

332/222
66.9%
91.4/115
271/340
.561/.514

345/238
69%
95/123
282/364
.50/.472

262/182
69.7%
1.47
.435/.318

Brodix HH 234 Out of Box Weingartner Racing Alum

234/-

2.15/1.57
4.155
No Pipe

N/A

132/95
72%

186/134
72%
51.2/69.2
152/205
.629/.62

248/176
71%
68.3/90.9
202/269
.629/.611

293/204
69.6%
80.7/105
239/312
.594/.567

318/219
68.9%
87.6/113
260/335
.537/.507

339/229
67.6%
93.4/118
277/350
.491/.454

338/235
69.5%
93.1/121
276/360
.428/.408

335/238
71%
92.3/123
273/364
.377/.367

335/-
92.3
273
.34

280/191
-
1.45
.435/.318

Brodix -8 STD FSH CARB Legal Alum

185/-

2.08/1.60

134/106
79.1%

191/135
70.7%
56.2/67.1
167/199
.667/.613

229/152
66.4%
67.4/75.6
200/224
.60/.518

233/159
68.2%
68.6/79.1
203/234
.488/.433

197/138
70.1%
1.26
.421/.324

Brodix -8 STD or SP 23 Deg Alum

194/-

2.08/1.60
-
No Pipe

134/109
81.3%

191/138
72.3%
56.2/68.6
167/203
.667/.627

230/155
67.4%
67.7/77.1
201/228
.603/.528

240/161
67.1%
70.6/80.1
209/237
.503/.439

199/141
70.8%
1.24
.421/.324

Brodix -8 PRO 23 Deg Alum

185/-

2.02/1.60
-
No Pipe

134/106
79.1%

191/135
70.7%
59.6/67.1
177/199
.687/.613

230/153
66.5%
71.8/76.1
213/225
.621/.521

240/160
66.7%
74.9/79.6
222/236
.518/.436

199/139
69.7%
1.30
.409/.324

Brodix -8 STD 23 Deg Ported ET Performance Alum

215/-

2.08/1.60
4.155

69/53
76.8%

136/92
67.6%

198/175
88.4%
58.3/87
173/258
.692/.795

248/207
83.5%
73/103
216/305
.65/.705

283/227
80.2%
83.3/113
247/335
.593/.619

287/237
82.6%
84.5/118
250/349
.501/.538

290/240
82.8%
85.3/119
253/354
.434/.467

240/196
81.7%
1.35
.421/.324

Brodix -10 STD or SP 23 Deg Alum

210/-

2.08/1.60

145/109
75.2%

195/139
71.3%
57.4/69.1
170/205
.681/.631

240/155
64.6%
70.6/77.1
209/228
.629/.528

253/161
63.6%
74.5/80.1
221/237
.53/.439

262/166
63.4%
77.1/82.6
228/245
.458/.377

262/168
64.1%
77.1/83.6
228/248
.392/.327

226/150
66.2%
1.25
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix -10 WP SP RI 23 Deg Alum

240/-

2.125/1.60

151/114
75.5%

223/156
70%
62.9/77.6
186/230
.763/.709

273/207
75.8%
77/103
228/305
.70/.705

304/230
75.7%
85.7/114
254/339
.624/.627

324/240
74.1%
91.4/119
271/354
.554/.545

332/245
73.8%
93.6/122
277/361
.487/.477

268/199
74.2%
1.38
.430/.324

Brodix -10 WP SP X - 231 23 Deg Alum

231/-

2.10/1.60

152/115
75.7%

222/167
75.2%
64.1/83.1
190/246
.768/.759

268/210
78.4%
77.4/104
229/309
.696/.715

297/227
76.4%
85.7/113
254/335
.617/.619

313/230
73.5%
90.4/114
268/339
.542/.522

320/234
73.1%
92.4/116
274/345
.475/.456

262/197
75.3%
1.39
.425/.324

Brodix -10 WP SP X - 233 23 Deg Alum

233/-

2.125/1.60

151/115
76.2%

223/167
74.9%
62.9/83.1
186/246
.763/.759

269/210
78.1%
75.8/104
225/309
.69/.715

300/227
75.7%
84.6/113
251/335
.616/.619

318/230
72.3%
89.7/114
266/339
.544/.522

329/234
71.1%
92.8/116
275/345
.482/.456

265/197
74.4%
1.41
.430/.324

Brodix -10 WP SP X AP 23 Deg Alum

230/-

2.125/1.60

156/107
68.6%

218/155
71.1%
61.5/77.1
182/228
.746/.704

271/194
71.6%
76.4/96.5
226/286
.695/.661

309/239
77.3%
87.1/119
258/352
.634/.651

336/251
74.7%
94.7/125
281/370
.575/.57

352/258
73.3%
99.3/128
294/380
.516/.502

274/201
73.3%
1.53
.430/.324

Brodix -10 CNC Jones Engineering Alum

240/-

2.125/1.60

151/114
75.5%

223/156
70%
62.9/77.6
186/230
.763/.709

273/207
75.8%
77/103
228/305
.70/.705

304/230
75.7%
85.7/114
254/339
.624/.627

324/240
74.1%
91.4/119
271/354
.554/.545

332/245
73.8%
93.6/122
277/361
.487/.477

268/199
74.2%
1.38
.430/.324

Brodix -11 STD or SP 23 Deg Alum

221/-

2.08/1.60

132/109
82.6%

188/138
73.4%
55.3/68.6
164/203
.657/.627

232/155
66.8%
68.3/77.1
202/228
.608/.528

260/161
61.9%
76.5/80.1
227/237
.545/.439

256/166
64.8%
75.3/82.6
223/245
.447/.377

258/167
64.7%
75.9/83.1
225/246
.386/.325

221/149
67.6%
1.18
.421/.324

Brodix -11 STD X 23 Deg 40/60 Alum

225/-

2.08/1.60

133/90
67.7%

191/126
66%
56.2/62.7
167/186
.667/.572

235/158
67.2%
69.2/78.6
205/233
.616/.538

272/184
67.6%
80/91.5
237/271
.57/.501

283/200
70.7%
83.3/99.5
247/295
.494/.454

285/208
73%
83.9/103
249/307
.427/.405

233/161
69%
1.27
.421/.324

Brodix -11 SP X ASCS/SUPR Alum

215/-

2.08/1.60

130/100
76.9%

187/132
70.6%
55/65.7
163/195
.653/.60

232/162
69.8%
68.3/80.6
202/239
.608/.552

265/185
69.8%
78/92
231/273
.556/.504

267/201
75.3%
78.6/100
233/296
.466/.456

270/210
77.8%
79.5/104
235/309
.404/.409

225/165
73.3%
1.26
.421/.324

Brodix -11 SP X ASCS 3V Performance Alum

N/A

2.08/1.60

N/A

74/67
90.5%

156/125
80.1%

212/172
81.1%
62.4/85.5
185/253
.741/.781

255/193
75.7%
75/96
222/284
.668/.657

272/201
73.9%
80/100
237/296
.57/.548

280/201
71.8%
82.4/100
244/296
.489/.456

235/178
75.9%
-
.421/.324

Brodix -11 SP X ASCS Chad Speier Worked Alum

N/A

2.08/1.60

N/A

142/-

211/-
62.1
184
.737

260/-
76.5
227
.681

290/-
85.3
253
.608

299/-
88
261
.522

292/-
85.9
255
.437

292/-
85.9
255
.383

291/-
85.6
254
.339

260
-
-
.421/.324

Brodix -11 SP X ASCS CNC smeg Alum

N/A

2.08/1.60

N/A

132/-

186/-
54.7
162
.65

235/-
69.2
205
.616

277/-
81.5
242
.581

300/-
88.3
262
.524

309/-
90.9
269
.463

310/-
91.2
270
.406

310/-
91.2
270
.361

257
-
-
.421/.324

Brodix -11 SP X 23 Deg 40/60 Alum

225/-

2.08/1.60

133/103
77.4%

191/137
71.7%
56.2/68.1
167/202
.667/.622

235/166
70.6%
69.2/82.6
205/245
.616/.565

272/188
69.1%
80/93.5
237/277
.57/.512

283/201
71%
83.3/100
247/296
.494/.456

285/211
74%
83.9/105
249/311
.427/.411

233/168
71.9%
1.27
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix -11 KC SP X 23 Deg 40/60 Alum

231/-

2.10/1.60

146/113
77.4%

203/149
73.4%
58.6/74.1
174/220
.703/.677

253/177
70%
73/88
216/261
.657/.603

293/198
67.6%
84.6/98.5
251/292
.608/.54

314/228
72.6%
90.7/113
269/336
.543/.518

316/236
74.7%
91.2/117
270/348
.469/.459

254/184
72.2%
1.37
.425/.324

Brodix -12 WP SP RI - 247 15 Deg CNC 40/60 Alum

247/-

2.15/1.60

152/120
78.9%

230/170
73.9%
63.4/84.6
188/251
.777/.772

284/216
76.1%
78.2/107
232/318
.72/.736

316/233
73.7%
87/116
258/343
.641/.635

326/240
73.6%
89.8/119
266/354
.551/.545

330/248
75.2%
90.9/123
269/365
.478/.483

273/205
74.9%
1.34
.435/.324

Brodix -12 WP SP RI - 262 15 Deg CNC 40/60 Alum

262/-

2.15/1.60

150/120
80%

228/170
74.6%
62.8/84.6
186/251
.771/.772

282/216
76.6%
77.7/107
230/318
.715/.736

322/233
72.4%
88.7/116
263/343
.653/.635

330/240
72.7%
90.9/119
269/354
.558/.545

335/248
74%
92.3/123
273/365
.485/.483

275/205
74.5%
1.28
.435/.324

Brodix -12 WP SP RI MC 15 Deg CNC 58/107 Alum

262/-

2.17/1.60

155/117
75.5%

224/177
79%
60.6/88
179/261
.75/.804

282/218
77.3%
76.2/108
226/321
.708/.743

329/231
70.2%
89/115
264/340
.661/.63

335/240
71.6%
90.6/119
268/354
.561/.545

347/247
71.2%
93.8/123
278/364
.498/.481

279/205
73.6%
1.32
.439/.324

Brodix -12 KC SP B 15 Deg CNC 40/60 Alum

287/-

2.15/1.60

155/120
77.4%

230/168
73%
63.4/83.6
188/248
.777/.763

285/216
75.8%
78.5/107
233/318
.723/.736

320/232
72.5%
88.1/115
261/342
.649/.632

343/240
70%
94.5/119
280/354
.58/.545

354/247
69.8%
97.5/123
289/364
.513/.481

281/204
72.5%
1.23
.435/.324

Brodix -12 STS SP WB MC 15 Deg CNC 70/125 Alum

305/-

2.20/1.60

159/106
66.7%

233/145
62.2%
61.3/72.1
182/214
.77/.659

290/190
65.5%
76.3/94.5
226/280
.718/.647

334/221
66.2%
87.9/110
260/326
.662/.602

361/235
65.1%
95/117
281/346
.596/.534

372/247
66.4%
97.9/123
290/364
.527/.481

292/191
65.4%
1.22
.446/.324

Brodix -12 15 Deg 288 CNC Chapman Alum

288/-

2.20/1.625
-
No Pipe

58.5

73/51
69.9%

163/112
68.7%

238/173
72.7%
62.6/83.4
186/247
.786/.774

293/219
74.7%
77.1/106
228/313
.726/.735

325/238
73.2%
85.5/115
253/340
.644/.639

362/242
66.9%
95.2/117
282/346
.598/.541

363/251
69.1%
95.5/121
283/359
.514/.481

291/206
70.8%
1.26
.446/.329

Brodix -12X12 WP SP B - 275 12 Deg CNC Alum

275/-

2.15/1.60

166/112
67.5%

236/156
66.1%
65/77.6
193/230
.798/.709

293/188
64.2%
80.7/93.5
239/277
.743/.64

333/237
71.2%
91.7/118
272/349
.675/.646

344/249
72.4%
94.8/124
281/367
.581/.565

346/255
73.7%
95.3/127
282/376
.501/.496

286/200
69.7%
1.26
.435/.324

Brodix -12X12 WP SP B - 286 12 Deg CNC Alum

286/-

2.18/1.60

154/112
72.7%

228/156
68.4%
61.1/77.6
181/230
.76/.709

289/188
65.1%
77.4/93.5
229/277
.723/.64

334/237
71%
89.5/118
265/349
.668/.646

357/249
69.7%
95.6/124
283/367
.595/.565

360/255
70.8%
96.4/127
286/376
.514/.496

287/200
69.5%
1.26
.441/.324

Brodix -12X12 WP SP B - 296 12 Deg CNC Alum

296/-

2.18/1.60

165/112
67.9%

230/156
67.8%
61.6/77.6
183/230
.767/.709

291/188
64.6%
78/93.5
231/277
.728/.64

338/237
70.1%
90.6/118
268/349
.676/.646

358/249
69.6%
95.9/124
284/367
.597/.565

376/255
67.8%
101/127
298/376
.537/.496

293/200
68.1%
1.27
.441/.324

Brodix -12X12 WP SP B - 299 12 Deg CNC Alum

299/-

2.20/1.60

154/119
77.3%

228/158
69.3%
60/78.6
178/233
.753/.718

290/216
74.5%
76.3/107
226/318
.718/.736

343/245
71.4%
90.2/122
267/361
.68/.668

375/254
67.7%
98.6/126
292/374
.619/.577

388/258
66.5%
102/128
302/380
.549/.502

399/263
65.9%
105/131
311/388
.494/.448

311/216
69.5%
1.33
.446/.324

Brodix -12X12 15 Deg 272 CNC Chapman Alum

272/-

2.18/1.625
-
No Pipe

73/54
74%

160/109
68.1%

234/171
73.1%
62.7/82.5
186/244
.78/.765

292/210
71.9%
78.2/101
232/300
.73/.704

330/232
70.3%
88.4/112
262/331
.66/.623

355/241
67.9%
95.1/116
282/344
.592/.539

359/250
69.6%
96.2/121
285/357
.513/.479

368/255
69.3%
98.6/123
292/364
.46/.428

300/210
70%
1.35
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix -12X12 15 Deg 292 CNC Chapman Alum

292/-

2.20/1.625
-
No Pipe

61.5

73/54
74%

151/109
72.2%

224/171
76.3%
58.9/82.5
175/244
.74/.765

287/210
73.2%
75.5/101
224/300
.711/.704

337/232
68.8%
88.7/112
263/331
.668/.623

365/241
66%
96/116
285/344
.603/.539

383/250
65.3%
101/121
299/357
.542/.479

393/255
64.9%
103/123
306/364
.487/.428

306/210
68.6%
1.35
.446/.329

Brodix -13 KC 13 Deg Ported 85/134 Alum

283/-

2.18/1.625

159/113
71.1%

239/164
68.6%
64/79.1
190/234
.797/.733

307/213
69.4%
82.2/103
244/304
.768/.714

352/236
67%
94.3/114
279/337
.704/.633

359/247
68.8%
96.2/119
285/353
.598/.552

364/258
70.9%
97.5/124
289/369
.52/.494

370/263
71.1%
99.1/127
294/376
.463/.441

307/213
69.5%
1.31
.441/.329

Brodix -15 WP SP / STD 15 Deg Ported 58/107 Alum

267/-

2.18/1.625

156/111
71.2%

225/164
72.9%
60.3/79.1
179/234
.75/.733

275/223
81.1%
73.7/108
218/319
.688/.748

327/245
74.9%
87.6/118
260/350
.654/.657

358/254
70.9%
95.9/122
284/363
.597/.568

362/259
71.5%
97/125
287/370
.517/.496

284/209
73.8%
1.36
.441/.329

Brodix 15 Deg CNC Alum

262/-

2.15/1.60

153/120
78.4%

228/170
74.6%
62.8/84.6
186/251
.771/.772

282/216
76.6%
77.7/107
230/318
.715/.736

322/233
72.4%
88.7/116
263/343
.653/.635

332/240
72.3%
91.4/119
271/354
.561/.545

340/252
74.1%
93.7/125
277/371
.493/.491

276/205
74.3%
1.30
.435/.324

Brodix 15 Deg CNC Jones Engineering Alum

261/-

2.18/1.60

156/111
71.2%

225/164
72.9%
60.3/81.6
179/242
.75/.745

275/223
81.1%
73.7/111
218/329
.688/.76

327/245
74.9%
87.6/122
260/361
.654/.668

358/254
70.9%
95.9/126
284/374
.597/.577

362/259
71.5%
97/129
287/382
.517/.504

284/209
73.8%
1.39
.441/.324

Brodix 15 Deg CNC Rons Porting Service Alum

297/-

2.20/1.60

155/125
80.6%

230/175
76.1%
60.5/87
179/258
.76/.795

290/210
72.4%
76.3/104
226/309
.718/.715

340/232
68.2%
89.4/115
265/342
.674/.632

375/241
64.3%
98.6/120
292/355
.619/.547

386/251
65%
102/125
301/370
.546/.489

296/206
69.5%
1.30
.446/.324

Brodix -16 KC STD 16 Deg 58/107 Alum

269/-

2.18/1.625

142/119
83.8%

211/161
76.3%
56.5/77.6
167/230
.703/.72

277/198
71.5%
74.2/95.5
220/283
.693/.664

332/233
70.2%
88.9/112
264/333
.664/.625

367/252
68.7%
98.3/122
291/360
.612/.563

379/261
68.9%
102/126
301/373
.541/.50

285/204
71.7%
1.41
.441/.329

Brodix 16 Deg CNC Jones Engineering Alum

267/-

2.18/1.60

161/101
62.7%

231/149
64.5%
61.9/74.1
183/220
.77/.677

291/211
72.5%
78/105
231/311
.728/.719

337/237
70.3%
90.3/118
268/349
.674/.646

360/253
70.3%
96.4/126
286/373
.60/.575

371/263
70.9%
99.4/131
295/388
.53/.512

375/268
71.5%
100/133
298/395
.469/.456

304/212
69.7%
1.40
.441/.324

Brodix -18 STD X 18 Deg 40/60 Alum

244/-

2.14/1.60

157/106
67.5%

212/145
68.4%
58.9/72.1
175/214
.72/.659

260/179
68.8%
72.3/89
214/264
.662/.61

303/195
64.4%
84.2/97
250/287
.617/.531

319/205
64.3%
88.7/102
263/302
.542/.466

325/211
64.9%
90.4/105
268/311
.473/.411

263/174
66.1%
1.33
.433/.324

Brodix -18 STD X 18 Deg M2 Race Systems CNC 40/60 Alum

254/-

2.14/1.60
4.125

145/110
75.9%

214/154
72%
59.5/76.6
176/227
.727/.699

261/206
78.9%
72.6/102
215/304
.665/.702

303/224
73.9%
84.2/111
250/330
.617/.61

328/231
70.4%
91.2/115
270/340
.557/.525

336/237
70.5%
93.4/118
277/349
.489/.461

265/194
73.2%
1.32
.433/.324

Brodix -18 SP X 18 Deg 40/60 Alum

244/-

2.14/1.60

157/122
77.7%

212/164
77.4%
58.9/81.6
175/242
.72/.745

260/200
76.9%
72.3/99.5
214/295
.662/.681

303/217
71.6%
84.2/108
250/320
.617/.591

319/226
70.8%
88.7/112
263/333
.542/.513

325/233
71.7%
90.4/116
268/343
.473/.454

263/194
73.7%
1.33
.433/.324

Brodix -18 SP X 18 Deg CNC M2 Race Systems 40/60 Alum

253/-

2.14/1.60
4.125

145/119
82.1%

214/158
73.8%
59.5/78.6
176/233
.727/.718

261/196
75.1%
72.6/97.5
215/289
.665/.668

303/232
76.6%
84.2/115
250/342
.617/.632

328/243
74.1%
91.2/121
270/358
.557/.552

336/250
74.4%
93.4/124
277/368
.489/.487

265/200
75.5%
1.33
.433/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix -18 SP X 18 Deg Ported Jason 40/60 Alum

258/-

2.15/1.60

N/A

144/127
88.2%

203/175
86.2%
55.9/87
166/258
.686/.795

261/216
82.8%
71.9/107
213/318
.662/.736

306/233
76.1%
84.3/116
250/343
.621/.635

334/240
71.9%
92/119
273/354
.564/.545

351/245
69.8%
96.7/122
286/361
.508/.477

359/248
69.1%
98.9/123
293/365
.455/.422

280/212
75.8%
1.39
.435/.324

Brodix -18 SP 18 Deg 262 CNC Chapman 40/60 Alum

262/-

2.15/1.625
-
No Pipe

72/52
72.2%

161/108
67.1%

225/174
77.3%
62/83.9
184/249
.761/.778

273/223
81.7%
75.2/108
223/319
.692/.748

314/246
78.3%
86.5/119
256/351
.637/.66

335/257
76.7%
92.3/124
273/367
.566/.575

348/263
75.6%
95.9/127
284/376
.504/.504

276/212
76.8%
1.33
.435/.329

Brodix -18 WP SP C 18 Deg CNC 58/107 Alum

254/-

2.18/1.625

157/112
71.3%

230/167
72.6%
61.6/80.5
183/239
.767/.747

280/209
74.6%
75/101
222/299
.70/.701

329/227
69%
88.1/109
261/324
.658/.609

360/238
66.1%
96.4/115
286/340
.60/.532

367/245
66.8%
98.3/118
291/350
.524/.47

287/200
69.5%
1.44
.441/.329

Brodix -18 KC SP C 18 Deg 58/107 Alum

254/-

2.18/1.625

163/119
73%

232/172
74.1%
62.2/82.9
184/246
.773/.769

288/214
74.3%
77.2/103
229/306
.72/.718

335/233
69.6%
89.8/112
266/333
.67/.625

351/242
68.9%
94/117
279/346
.585/.541

360/250
69.4%
96.4/121
286/357
.514/.479

288/205
71.1%
1.42
.441/.329

Brodix -18 WP SP C AP 18 Deg CNC 58/107 Alum

266/-

2.18/1.625

154/134
87%

224/175
78.1%
60/84.4
178/250
.747/.783

278/241
86.7%
74.5/116
221/344
.695/.808

328/261
79.6%
87.9/126
260/373
.656/.70

369/270
73.2%
98.9/130
293/386
.615/.604

395/274
69.4%
106/132
314/391
.564/.525

291/226
77.5%
1.48
.441/.329

Brodix 18 Deg Busch Ported ET Performance Alum

257/-

2.15/1.60
4.03

52.5

74/49
66.2%

159/114
71.7%

231/177
76.6%
63.6/88
189/261
.781/.804

288/219
76%
79.3/109
235/323
.73/.746

323/238
73.7%
89/118
264/351
.655/.649

340/246
72.4%
93.7/122
277/363
.575/.559

268/199
74.1%
1.32
.435/.324

Brodix 18 Deg Ported ET Performance Alum

260/-

2.14/1.60
4.155

52.5

71/54
76.1%

143/106
74.1%

220/159
72.3%
61.2/79.1
181/234
.747/.722

283/213
75.3%
78.7/106
233/314
.721/.726

326/239
73.3%
90.6/119
269/352
.664/.651

349/251
71.9%
97/125
287/370
.593/.57

356/257
72.2%
99/128
293/379
.518/.50

362/264
72.9%
101/131
298/389
.461/.45

291/213
73%
1.39
.433/.324

Brodix 18 Deg CNC Rons Porting Service 262 Alum

262/-

2.18/1.625

156/129
82.7%

225/188
83.6%
60.3/90.6
179/269
.75/.841

281/232
82.6%
75.3/112
223/331
.703/.778

331/243
73.4%
88.7/117
263/347
.662/.652

350/248
70.9%
93.8/120
278/354
.583/.555

360/250
69.4%
96.4/121
286/357
.514/.479

362/252
69.6%
97/122
287/360
.453/.423

295/220
74.7%
1.38
.441/.329

Brodix 18 Deg CNC Rons Porting Service 278 Alum

278/-

2.18/1.625

150/125
83.3%

220/180
81.8%
58.9/86.8
175/257
.733/.805

281/224
79.7%
75.3/108
223/320
.703/.751

331/240
72.5%
88.7/116
263/343
.662/.644

362/248
68.5%
97/120
287/354
.603/.555

380/251
66.1%
102/121
302/359
.543/.481

385/254
66%
103/122
306/363
.481/.426

301/217
72.2%
1.38
.441/.329

Brodix 18 Deg CNC AP Alum

266/-

2.18/1.625

154/113
73.4%

224/162
72.3%
60/78.1
178/231
.747/.724

278/224
80.6%
74.5/108
221/320
.695/.751

328/241
73.5%
87.9/116
260/344
.656/.647

369/248
67.2%
98.9/120
293/354
.615/.555

395/254
64.3%
106/122
314/363
.564/.487

291/207
71.1%
1.48
.441/.329

Brodix 18 Deg Ported Meaux Racing SF600 Alum

256/99

2.18/1.625
4.125
No Pipe

48.5

139/124
89.2%

218/192
88.1%
58.4/92.6
173/274
.727/.859

281/228
81.1%
75.3/110
223/326
.703/.765

321/246
76.6%
86/119
255/351
.642/.66

343/252
73.5%
91.9/122
272/360
.572/.563

351/258
73.5%
94/124
279/369
.501/.494

358/262
73.2%
95.9/126
284/374
.448/.439

362/265
73.2%
97/128
287/379
.402/.395

297/228
77%
1.41/2.68
.441/.329

Brodix Track 1 Alum CHP

N/A

2.08/1.60

N/A

60/48
80%

115/106
92.2%

166/147
88.6%
48.9/73.1
145/217
.58/.668

209/178
85.2%
61.5/88.5
182/262
.548/.606

246/191
77.6%
72.4/95
215/281
.516/.521

267/200
74.9%
78.6/99.5
233/295
.466/.454

201/164
82%
-
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix Track 1 Alum

215/-

2.08/1.60

128/111
86.7%

183/149
81.4%
53.9/74.1
160/220
.639/.677

229/179
78.2%
67.4/89
200/264
.60/.61

268/193
72%
78.9/96
234/284
.562/.526

269/207
77%
79.2/103
235/305
.47/.47

215/168
77.9%
1.25
.421/.324

Brodix Track 1 227 CNC Out of Box Weingartner Racing

227/-

2.08/1.60
4.125
No Pipe

N/A

70/58
82.9%

146/114
78.1%

214/163
76.2%
63/81.1
187/240
.748/.74

268/205
76.5%
78.9/102
234/302
.702/.698

298/221
74.2%
87.7/110
260/326
.625/.602

312/227
72.8%
91.8/113
272/335
.545/.516

318/235
73.9%
93.6/117
277/346
.476/.457

259/194
74.9%
1.40
.421/.324

Brodix Track 1 23 Deg Ported Alum

215/-

2.08/1.60

147/110
74.8%

213/142
66.7%
62.7/70.6
186/209
.744/.645

258/180
69.8%
75.9/89.5
225/265
.676/.613

288/213
74%
84.8/106
251/314
.604/.58

290/225
77.6%
85.3/112
253/332
.507/.511

294/231
78.6%
86.5/115
256/340
.44/.45

248/184
73.9%
1.37
.421/.324

Brodix Track 1 23 Deg CNC M2 Race Systems Alum

215/-

2.08/1.60
4.03

151/116
76.8%

219/150
68.5%
64.5/74.6
191/221
.765/.681

263/185
70.3%
77.4/92
229/273
.689/.63

291/208
71.5%
85.6/103
254/307
.61/.567

294/219
74.5%
86.5/109
256/323
.514/.497

296/227
76.7%
87.1/113
258/335
.443/.442

252/184
73%
1.38
.421/.324

Brodix Track 1 23 Deg CNC M2 Race Systems Alum

227/-

2.08/1.60
4.125

145/116
80%

207/150
72.5%
60.9/74.6
181/221
.723/.681

260/185
71.2%
76.5/92
227/273
.681/.63

297/208
70%
87.4/103
259/307
.623/.567

305/219
71.8%
89.8/109
266/323
.533/.497

309/227
73.5%
90.9/113
269/335
.463/.442

254/184
72.6%
1.36
.421/.324

Brodix Track 1 23 Deg Alum

221/-

2.08/1.60

124/103
83.1%

179/138
77.1%
52.7/68.6
156/203
.625/.627

228/164
71.9%
67.1/81.6
199/242
.597/.559

264/178
67.4%
77.7/88.5
230/262
.553/.485

276/186
67.4%
81.2/92.5
241/274
.482/.422

279/190
68.1%
82.1/94.5
243/280
.418/.37

225/160
71%
1.26
.421/.324

Brodix Track 1 23 Deg Ported BHPerformace Alum

N/A

-
-
No Pipe

N/A

68/60
88.2%

134/115
85.8%

198/162
81.8%
-

257/192
74.7%
-

301/206
68.4%
-

318/218
68.6%
-

330/227
68.8%
-

256/187
72.8%

Brodix Track 1X 23 Deg 40/60 Alum

222/-

2.10/1.60

152/113
74.3%

213/152
71.4%
61.5/75.6
182/224
.737/.69

262/173
66%
75.6/86
224/255
.68/.589

285/185
64.9%
82.3/92
244/273
.592/.504

287/192
66.9%
82.9/95.5
246/283
.497/.436

292/195
66.8%
84.3/97
250/287
.433/.38

249/168
67.7%
1.32
.425/.324

Brodix Track 1X 23 Deg CNC 40/60 Rons Porting Service Alum

236/-

2.125/1.60

155/119
76.8%

224/163
72.8%
63.2/81.1
187/240
.766/.74

279/194
69.5%
78.7/96.5
233/286
.716/.661

308/210
68.2%
86.8/104
257/309
.632/.572

326/226
69.3%
91.9/112
272/333
.557/.513

331/235
71%
93.3/117
277/346
.485/.457

333/242
72.7%
93.9/120
278/357
.427/.412

279/198
71%
1.41
.430/.324

Brodix Track 1 40/60 Valve Spacing 23 Deg Alum

N/A

2.125/1.60

N/A

138/106
76.8%

199/145
72.9%
56.1/72.1
166/214
.681/.659

253/182
71.9%
71.3/90.5
211/268
.649/.62

294/209
71.1%
82.9/104
246/308
.603/.57

318/224
70.4%
89.7/111
266/330
.544/.509

325/233
71.7%
91.6/116
272/343
.476/.454

255/183
72%
-
.430/.324

Brodix STS Track 1 23 Deg Alum

215/-

2.08/1.60

150/116
77.3%

213/150
70.4%
62.7/74.6
186/221
.744/.681

258/185
71.7%
75.9/92
225/273
.676/.63

285/208
73%
83.9/103
249/307
.597/.567

303/219
72.3%
89.2/109
264/323
.529/.497

305/227
74.4%
89.8/113
266/335
.457/.442

252/184
73%
1.42
.421/.324

Brodix KC Track 1 23 Deg Alum

227/-

2.08/1.60

154/116
75.3%

223/150
67.3%
65.6/74.6
194/221
.779/.681

270/185
68.5%
79.5/92
235/273
.708/.63

303/208
68.6%
89.2/103
264/307
.635/.567

312/219
70.2%
91.8/109
272/323
.545/.497

316/227
71.8%
93/113
276/335
.473/.442

263/184
70%
1.39
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix STS Track 1 23 Deg CNC I-50 E-45 40/60 Alum

233/-

2.125/1.60

139/106
76.3%

200/145
72.5%
56.4/72.1
167/214
.684/.659

254/181
71.3%
71.6/90
212/267
.651/.617

296/209
70.6%
83.5/104
247/308
.607/.57

319/224
70.2%
89.9/111
267/330
.545/.509

326/233
71.5%
91.9/116
272/343
.478/.454

256/183
71.6%
1.40
.430/.324

Brodix JJ 180 23 Deg Alum

180/-

2.02/1.60

138/97
70.3%

194/129
66.5%
60.5/64.2
179/190
.698/.586

234/155
66.2%
73/77.1
216/228
.631/.528

243/171
70.4%
75.8/85
225/252
.525/.466

245/179
73.1%
76.4/89
227/264
.441/.407

211/146
69.4%
1.36
.409/.324

Brodix JJ 200 23 Deg Alum

200/-

2.05/1.60

125/97
77.6%

182/129
70.9%
55.1/64.2
163/190
.645/.586

227/155
68.3%
68.8/77.1
204/228
.604/.528

260/171
65.8%
78.8/85
233/252
.553/.466

266/179
67.3%
80.6/89
239/264
.471/.407

212/146
69%
1.33
.415/.324

Brodix JJ 210 CNC 23 Deg Alum

210/-

2.08/1.60

148/110
74.3%

217/166
76.5%
63.9/82.6
189/245
.758/.754

260/200
76.9%
76.5/99.5
227/295
.681/.681

278/214
77%
81.8/106
242/315
.583/.583

284/219
77.1%
83.6/109
248/323
.496/.497

287/224
78%
84.5/111
250/330
.43/.436

246/189
76.9%
1.37
.421/.324

Brodix IK 180 23 Deg Alum

180/-

2.02/1.60

64/70

138/112
81.2%

188/149
79.3%
58.7/74.1
174/220
.676/.677

234/167
71.4%
73/83.1
216/246
.631/.569

243/175
72%
75.8/87
225/258
.525/.477

245/178
72.7%
76.4/88.5
227/262
.441/.404

210/156
74.5%
1.36
.409/.324

Brodix IK 200 23 Deg Alum

200/-

2.02/1.60

64/70

123/100
81.3%

181/145
80.1%
56.5/72.1
167/214
.651/.659

230/164
71.3%
71.8/81.6
213/242
.621/.559

253/171
67.6%
78.9/85
234/252
.546/.466

261/176
67.4%
81.4/87.5
241/259
.469/.40

262/177
67.6%
81.8/88
242/261
.404/.345

218/156
71.2%
1.31
.409/.324

Brodix IK 200 23 Deg Out of Box Weingartner Racing Alum

200/-

2.02/1.60
4.155
No Pipe

N/A

62/46
74.2%

125/94
75.2%

171/134
78.4%
53.4/66.6
158/197
.615/.609

223/157
70.4%
69.6/78.1
206/231
.602/.535

235/166
70.6%
73.3/82.6
217/245
.507/.452

260/172
66.2%
81.1/85.5
240/253
.468/.391

262/173
66%
81.8/86
242/255
.404/.337

213/149
70.2%
1.31
.409/.324

Brodix IK 210 23 Deg Ported Alum

210/-

2.08/1.60

148/110
74.3%

217/166
76.5%
63.9/82.6
189/245
.758/.754

260/200
76.9%
76.5/99.5
227/295
.681/.681

278/214
77%
81.8/106
242/315
.583/.583

284/219
77.1%
83.6/109
248/323
.496/.497

287/224
78%
84.5/111
250/330
.43/.436

246/189
76.9%
1.37
.421/.324

Brodix RR 180 23 Deg Alum

180/-

2.02/1.60

64/67

138/97
70.3%

194/129
66.5%
60.5/64.2
179/190
.698/.586

234/155
66.2%
73/77.1
216/228
.631/.528

243/171
70.4%
75.8/85
225/252
.525/.466

245/179
73.1%
76.4/89
227/264
.441/.407

211/146
69.4%
1.36
.409/.324

Brodix RR 180 23 Deg CNC CC Alum

180/-

2.02/1.60

64/67

142/113
79.6%

199/153
76.9%
62.1/76.1
184/225
.716/.695

238/171
71.8%
74.3/85
220/252
.642/.583

241/179
74.3%
75.2/89
223/264
.52/.488

241/184
76.3%
75.2/91.5
223/271
.434/.418

212/160
75.4%
1.34
.409/.324

Brodix RR 200 23 Deg Alum

200/-

2.055/1.60

64/67

125/97
77.6%

182/129
70.9%
54.9/64.2
163/190
.644/.586

227/155
68.3%
68.4/77.1
203/228
.602/.528

260/171
65.8%
78.4/85
232/252
.552/.466

266/179
67.3%
80.2/89
238/264
.47/.407

212/146
69%
1.33
.416/.324

Brodix RR 200 23 Deg CNC CC Alum

200/-

2.055/1.60

64/67

141/113
80.1%

221/153
69.2%
66.6/76.1
197/225
.782/.695

242/171
70.7%
73/85
216/252
.642/.583

265/179
67.5%
79.9/89
237/264
.562/.488

272/183
67.3%
82/91
243/270
.481/.416

228/160
70%
1.36
.416/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix CV SP 265 Alum

265/-

2.20/1.60

159/109
68.6%

232/145
62.5%
61/72.1
181/214
.766/.659

293/188
64.2%
77.1/93.5
228/277
.726/.64

347/221
63.7%
91.3/110
270/326
.688/.602

379/237
62.5%
99.7/118
295/349
.626/.538

395/244
61.8%
104/121
308/360
.559/.475

301/191
63.4%
1.49
.446/.324

Brodix CV SP 330 Alum

330/-

2.25/1.60

165/116
70.3%

243/158
65%
61.1/78.6
181/233
.785/.718

305/193
63.3%
76.7/96
227/284
.739/.657

350/234
66.9%
88/116
261/345
.678/.638

376/245
65.2%
94.6/122
280/361
.607/.556

392/254
64.8%
98.6/126
292/374
.543/.494

305/200
65.5%
1.19
.456/.324

Brodix 13 Deg CNC Jones Engineering Alum

282/-

2.18/1.60

158/110
69.6%

234/156
66.7%
62.7/77.6
186/230
.78/.709

302/219
72.5%
80.9/109
240/323
.755/.746

349/243
69.6%
93.5/121
277/358
.698/.662

371/260
70.1%
99.4/129
295/383
.618/.59

377/267
70.8%
101/133
299/393
.539/.52

385/271
70.4%
103/135
306/399
.481/.462

311/218
70.1%
1.37
.441/.324

Brodix BP AK 13 Deg 270 95/150 Alum

270/-

2.18/1.60

154/110
71.4%

236/161
68.2%
63.2/80.1
187/237
.787/.731

298/213
71.5%
79.8/106
237/314
.745/.726

333/238
71.5%
89.2/118
264/351
.666/.649

361/248
68.7%
96.7/123
287/365
.602/.563

376/258
68.6%
101/128
298/380
.537/.502

293/205
69.9%
1.39
.441/.324

Brodix BP AK 13 Deg 285 95/150 Alum

285/-

2.18/1.60

157/110
70.1%

239/161
67.4%
64/80.1
190/237
.797/.731

298/213
71.5%
79.8/106
237/314
.745/.726

339/238
70.2%
90.8/118
269/351
.678/.649

369/248
67.2%
98.9/123
293/365
.615/.563

382/258
67.5%
102/128
303/380
.546/.502

297/205
68.8%
1.34
.441/.324

Brodix WP LM 12 Deg 85/134 Alum

300/-

2.18/1.625

155/111
71.6%

236/155
65.7%
63.2/74.7
187/221
.787/.693

305/215
70.5%
81.7/104
242/307
.763/.721

352/243
69%
94.3/117
279/347
.704/.652

375/254
67.7%
100/122
298/363
.625/.568

384/263
68.5%
103/127
305/376
.549/.504

387/270
69.8%
104/130
307/386
.484/.453

313/216
68.9%
1.29
.441/.329

Brodix BD 1000 12 Deg 275 Weld Tech Alum

275/-

2.15/1.60

166/112
67.5%

236/156
66.1%
65/77.6
193/230
.798/.709

293/188
64.2%
80.7/93.5
239/277
.743/.64

333/237
71.2%
91.7/118
272/349
.675/.646

344/249
72.4%
94.8/124
281/367
.581/.565

346/255
73.7%
95.3/127
282/376
.501/.496

286/200
69.7%
1.26
.435/.324

Brodix BD 1000 12 Deg 286 Weld Tech Alum

286/-

2.18/1.60

154/112
72.7%

228/156
68.4%
61.1/77.6
181/230
.76/.709

289/188
65.1%
77.4/93.5
229/277
.723/.64

334/237
71%
89.5/118
265/349
.668/.646

357/249
69.7%
95.6/124
283/367
.595/.565

360/255
70.8%
96.4/127
286/376
.514/.496

287/200
69.5%
1.26
.441/.324

Brodix BD 1010 12 / 13.5 Deg CNC 58/125 Alum

299/-

2.20/1.60

152/117
77%

229/162
70.7%
60.2/80.6
178/239
.756/.736

292/220
75.3%
76.8/109
228/324
.723/.749

343/245
71.4%
90.2/122
267/361
.68/.668

375/255
68%
98.6/127
292/376
.619/.579

388/260
67%
102/129
302/383
.549/.506

297/210
70.8%
1.30
.446/.324

Brodix BD 1010 12 Deg CNC Jones Engineering 58/125 Alum

282/-

2.18/1.60

153/110
71.9%

231/162
70.1%
61.9/80.6
183/239
.77/.736

295/221
74.9%
79/110
234/326
.738/.753

342/243
71.1%
91.6/121
271/358
.684/.662

370/252
68.1%
99.1/125
294/371
.617/.572

392/258
65.8%
105/128
311/380
.56/.502

399/261
65.4%
107/130
317/385
.499/.445

312/215
69.1%
1.41
.441/.324

Brodix BD 2000 12 / 13.5 Deg CNC 85/125 Alum

285/-

2.20/1.58

157/109
69.4%

238/152
63.9%
62.6/77.5
186/230
.786/.699

302/205
67.9%
79.4/105
235/310
.748/.707

353/232
65.7%
92.9/118
275/351
.70/.64

381/241
63.3%
100/123
297/364
.629/.554

399/250
62.7%
105/128
311/378
.565/.493

305/198
65%
1.40
.446/.320

Brodix BD 2000 CNC Out of Box - Darin Morgan SF600 85/125 Alum

N/A

2.20/1.60
-
No Pipe

N/A

168/104
61.9%

237/141
59.5%
62.3/70.1
185/208
.783/.64

301/194
64.5%
79.2/96.5
235/286
.746/.661

344/223
64.8%
90.5/111
268/329
.682/.608

377/237
62.9%
99.2/118
294/349
.623/.538

400/241
60.3%
105/120
312/355
.566/.469

397/242
61%
104/120
309/357
.492/.412

381/244
64%
100/121
297/360
.42/.369

380/245
64.5%
100/122
296/361
.377/.334

332/208
62.7%
-
.446/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix BD 2000 Ported TEA 85/125 Alum

285/-

N/A

73/59
80.8%

159/115
72.3%

230/187
81.3%
-

290/254
87.6%
-

342/277
81%
-

371/289
77.9%
-

391/295
75.4%
-

399/301
75.4%
-

312/245
78.7%
1.40

Brodix BD 2300 13.5 Deg CNC 95/150 Alum

311/-

2.23/1.60

150/113
75.3%

223/164
73.5%
57.1/81.6
169/242
.727/.745

275/219
79.6%
70.4/109
209/323
.672/.746

331/246
74.3%
84.7/122
251/363
.647/.67

382/256
67%
97.8/127
290/377
.622/.581

401/260
64.8%
103/129
304/383
.56/.506

417/267
64%
107/133
316/393
.51/.455

311/218
70%
1.34
.452/.324

Brodix BD 2300 13.5 Deg CNC Jones Engineering 95/125 Alum

312/-

2.20/1.60

137/113
82.5%

226/164
72.6%
59.5/81.6
176/242
.747/.745

304/219
72%
80/109
237/323
.753/.746

363/246
67.8%
95.5/122
283/363
.719/.67

394/256
65%
104/127
307/377
.651/.581

410/262
63.9%
108/130
320/386
.58/.51

421/267
63.4%
111/133
328/393
.522/.455

322/218
67.7%
1.35
.446/.324

Brodix WP BD 4510 12 Deg 4.5 BS CNC 88/184 Alum

292/-

2.20/1.60

159/114
71.7%

243/155
63.8%
63.9/77.1
189/228
.803/.704

307/196
63.8%
80.8/97.5
239/289
.761/.668

356/229
64.3%
93.7/114
277/337
.706/.624

378/251
66.4%
99.4/125
295/370
.624/.57

390/258
66.2%
103/128
304/380
.552/.502

402/263
65.4%
106/131
313/388
.498/.448

319/209
65.6%
1.38
.446/.324

Brodix WP FF 13 Deg 4.5 BS CNC 88/184 Alum

290/-

2.20/1.60

159/114
71.7%

238/155
65.1%
62.6/77.1
186/228
.786/.704

304/194
63.8%
80/96.5
237/286
.753/.661

356/237
66.6%
93.7/118
277/349
.706/.646

377/253
67.1%
99.2/126
294/373
.623/.575

386/260
67.4%
102/129
301/383
.546/.506

389/265
68.1%
102/132
303/391
.482/.451

316/211
66.9%
1.34
.446/.324

Brodix DR 1213 12.5 / 13.5 Deg CNC Jones Engineering Alum

315/-

2.23/1.60

141/105
74.5%

221/159
71.9%
56.6/79.1
168/234
.72/.722

295/210
71.2%
75.5/104
224/309
.721/.715

351/237
67.5%
89.9/118
266/349
.686/.646

396/252
63.6%
101/125
300/371
.645/.572

421/262
62.2%
108/130
319/386
.588/.51

435/268
61.6%
111/133
330/395
.532/.456

323/213
66.1%
1.38
.452/.324

Brodix 1213 12.5 / 13.5 Deg CNC RFD Alum

318/-

2.25/1.60

N/A

180/155
86.1%

258/202
78.3%
64.9/100
192/298
.833/.918

314/246
78.3%
79/122
234/363
.761/.838

360/276
76.7%
90.5/137
268/407
.698/.752

410/283
69%
103/141
306/417
.662/.643

421/286
67.9%
106/142
314/421
.583/.557

433/288
66.5%
109/143
323/424
.524/.491

446/290
65%
112/144
332/427
.48/.439

353/253
71.8%
1.40
.456/.324

Brodix GB 2000 WP 286 13.5 Deg CNC 85/125 Alum

286/-

2.20/1.58

157/109
69.4%

238/152
63.9%
62.6/77.5
186/230
.786/.699

302/205
67.9%
79.4/105
235/310
.748/.707

353/232
65.7%
92.9/118
275/351
.70/.64

381/241
63.3%
100/123
297/364
.629/.554

399/250
62.7%
105/128
311/378
.565/.493

305/198
65%
1.40
.446/.320

Brodix GB 2000 13.5 Deg Ported TEA 85/125 Alum

285/-

N/A

78/59
75.6%

170/115
67.6%

244/187
76.6%
-

304/254
83.6%
-

349/277
79.4%
-

375/289
77.1%
-

387/295
76.2%
-

399/301
75.4%
-

318/245
77.1%
1.40

Brodix GB 2200 WP 282 13.5 Deg CNC 85/125 Alum

282/-

2.20/1.58

150/104
69.3%

223/158
70.9%
58.7/80.6
174/239
.737/.727

286/210
73.4%
75.2/107
223/317
.709/.724

336/235
69.9%
88.4/120
262/355
.666/.649

368/246
66.8%
96.8/125
287/372
.608/.566

383/252
65.8%
101/129
299/381
.542/.497

291/201
69%
1.36
.446/.320

Brodix GB 2200 WP 282 + 30 13.5 Deg CNC 85/125 Alum

282/-

2.20/1.58

150/104
69.3%

224/158
70.5%
58.9/80.6
175/239
.74/.727

289/210
72.7%
76/107
225/317
.716/.724

337/235
69.7%
88.7/120
263/355
.668/.649

371/246
66.3%
97.6/125
289/372
.613/.566

396/252
63.6%
104/129
309/381
.561/.497

295/201
68.2%
1.40
.446/.320

Brodix GB 2200 13.5 Deg 282 CNC Jones Engineering 85/125 Alum

282/-

2.20/1.58

150/104
69.3%

223/158
70.9%
58.7/80.6
174/239
.737/.727

286/210
73.4%
75.2/107
223/317
.709/.724

336/235
69.9%
88.4/120
262/355
.666/.649

368/246
66.8%
96.8/125
287/372
.608/.566

383/252
65.8%
101/129
299/381
.542/.497

291/201
69%
1.36
.446/.320

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix GB 2200 13.5 Deg 293 CNC Jones Engineering 85/125 Alum

293/-

2.20/1.58

152/104
68.4%

228/158
69.3%
60/80.6
178/239
.753/.727

292/210
71.9%
76.8/107
228/317
.723/.724

339/235
69.3%
89.2/120
264/355
.672/.649

373/246
66%
98.1/125
291/372
.616/.566

390/252
64.6%
103/129
304/381
.552/.497

296/201
67.9%
1.33
.446/.320

Brodix GB 2300 WP 309 13.5 Deg CNC 75/125 Alum

309/-

2.20/1.58

153/100
65.4%

231/151
65.4%
60.8/77
180/228
.763/.695

286/216
75.5%
75.2/110
223/326
.709/.745

342/243
71.1%
90/124
267/367
.678/.671

374/250
66.8%
98.4/128
292/378
.618/.575

394/253
64.2%
104/129
307/382
.558/.499

297/202
68.1%
1.28
.446/.320

Brodix GB 2300 13.5 Deg CNC RFD 75/125 Alum

N/A

2.22/1.60

188/140
74.5%

255/170
66.7%
65.9/84.6
195/251
.835/.772

312/240
76.9%
80.6/119
239/354
.766/.818

357/255
71.4%
92.2/127
273/376
.701/.695

399/280
70.2%
103/139
305/413
.653/.636

418/284
67.9%
108/141
320/419
.586/.553

430/289
67.2%
111/144
329/426
.528/.492

439/290
66.1%
113/144
336/427
.479/.439

350/244
69.6%
-
.450/.324

Brodix GB 2300 13.5 Deg CNC M2 Race Systems 75/125 Alum

317/-

2.20/1.58
4.155

74/63
85.1%

167/135
80.8%

225/186
82.7%
59.2/94.9
175/281
.743/.856

280/224
80%
73.7/114
218/339
.694/.773

327/240
73.4%
86/122
255/363
.648/.662

364/244
67%
95.8/124
284/369
.601/.561

388/245
63.1%
102/125
302/370
.549/.483

401/245
61.1%
105/125
313/370
.497/.423

307/217
70.6%
1.26
.446/.320

Brodix GB 2300 13.5 Deg 309 CNC Jones Engineering 75/125 Alum

309/-

2.20/1.58

153/100
65.4%

231/151
65.4%
60.8/77
180/228
.763/.695

286/216
75.5%
75.2/110
223/326
.709/.745

342/243
71.1%
90/124
267/367
.678/.671

374/250
66.8%
98.4/128
292/378
.618/.575

394/253
64.2%
104/129
307/382
.558/.499

297/202
68.1%
1.28
.446/.320

Brodix GB 2300 13.5 Deg 311 CNC Jones Engineering 75/125 Alum

311/-

2.20/1.58

155/121
78.1%

234/177
75.6%
61.6/90.3
182/267
.773/.814

296/232
78.4%
77.9/118
231/351
.733/.80

344/245
71.2%
90.5/125
268/370
.682/.676

380/252
66.3%
100/129
296/381
.628/.58

395/256
64.8%
104/131
308/387
.559/.505

301/214
71.1%
1.27
.446/.320

Brodix GB 2300 13.5 Deg 311 CNC Jones Engineering 75/125 Alum

311/-

2.23/1.60

150/113
75.3%

223/164
73.5%
57.1/81.6
169/242
.727/.745

275/219
79.6%
70.4/109
209/323
.672/.746

331/246
74.3%
84.7/122
251/363
.647/.67

382/256
67%
97.8/127
290/377
.622/.581

401/262
65.3%
103/130
304/386
.56/.51

417/267
64%
107/133
316/393
.51/.455

311/218
70.1%
1.34
.452/.324

Brodix GB 2400 WP 13.5 Deg CNC 75/150 Alum

325/-

2.20/1.58

-
-
-
.446/.320

Brodix GB 2500 13.5 Deg CNC MBE Dirt Alum

N/A

2.20/1.60
-
No Pipe

N/A

63/48
76.2%

138/101
73.2%

214/146
68.2%
56.3/72.6
167/215
.707/.663

284/197
69.4%
74.7/98
221/290
.704/.671

342/231
67.5%
90/115
267/340
.678/.63

388/251
64.7%
102/125
302/370
.641/.57

411/261
63.5%
108/130
320/385
.582/.508

419/270
64.4%
110/134
327/398
.519/.46

422/272
64.5%
111/135
329/401
.465/.412

425/271
63.8%
112/135
331/399
.421/.369

338/222
65.7%
-
.446/.324

Brodix GB 2500 13.5 Deg CNC MBE I-55 E-55 SF600 Alum

319/-

2.23/1.60
4.155
No Pipe

N/A

133/98
73.7%

223/146
65.5%
57.1/72.6
169/215
.727/.663

300/188
62.7%
76.8/93.5
228/277
.733/.64

357/220
61.6%
91.4/109
271/324
.698/.60

401/248
61.8%
103/123
304/365
.653/.563

430/260
60.5%
110/129
326/383
.601/.506

445/270
60.7%
114/134
338/398
.544/.46

446/273
61.2%
114/136
338/402
.484/.413

342/213
62.3%
1.40
.452/.324

Brodix GB 2500 12.5 / 13.5 Deg CNC RFD Alum

318/-

2.25/1.60

180/155
86.1%

258/202
78.3%
64.9/100
192/298
.833/.918

314/246
78.3%
79/122
234/363
.761/.838

360/276
76.7%
90.5/137
268/407
.698/.752

410/283
69%
103/141
306/417
.662/.643

421/286
67.9%
106/142
314/421
.583/.557

433/288
66.5%
109/143
323/424
.524/.491

446/290
65%
112/144
332/427
.48/.439

353/253
71.8%
1.40
.456/.324

Brodix Canted Valve Ported Bullet Cylinder Heads Alum

N/A

2.20/1.60

N/A

80/92
115%

161/163
101%

228/206
90.4%
60/102
178/304
.753/.936

283/219
77.4%
74.4/109
221/323
.701/.746

332/223
67.2%
87.3/111
259/329
.658/.608

366/235
64.2%
96.3/117
285/346
.605/.534

389/240
61.7%
102/119
303/354
.551/.467

401/255
63.6%
105/127
313/376
.497/.434

411/260
63.3%
108/129
320/383
.453/.394

321/225
70.1%
-
.446/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Canfield CCM Alum

195/-

2.02/1.60

61/51
83.6%

128/103
80.5%

191/143
74.9%
59.6/71.1
177/211
.687/.65

238/170
71.4%
74.3/84.6
220/251
.642/.579

271/189
69.7%
84.6/94
251/279
.585/.515

254/200
78.7%
79.3/99.5
235/295
.457/.454

216/161
74.4%
1.39
.409/.324

Canfield 23-500-65 SF600 Alum

195/-

2.055/1.60
4.03
1 3/4" Pipe

72/53
73.6%

145/107
73.8%

201/143
71.1%
60.6/71.1
180/211
.711/.65

247/175
70.9%
74.5/87
221/258
.655/.596

258/190
73.6%
77.8/94.5
230/280
.547/.518

259/200
77.2%
78.1/99.5
231/295
.458/.454

259/203
78.4%
78.1/101
231/299
.393/.395

228/170
74.4%
1.33
.416/.324

Canfield 23-550-65 Alum

215/-

2.08/1.60
4.125
Pipe

N/A

62/43
69.4%

141/112
79.4%

207/152
73.4%
60.9/75.6
181/224
.723/.69

255/173
67.8%
75/86
222/255
.668/.589

270/184
68.1%
79.5/91.5
235/271
.566/.501

279/195
69.9%
82.1/97
243/287
.487/.443

283/213
75.3%
83.3/106
247/314
.424/.415

239/172
71.7%
1.32
.421/.324

Canfield 23-550-65 Alan / Burtonsville Performance Out of Box SF600 Alum

215/-

2.08/1.60
4.25
No Pipe

N/A

-/50

-/992

-/152

-/149

-/157

-/161

-/164

-/172

-
-
-
.421/.324

Canfield 23-550-65 Minor Pocket Porting Alan / Burtonsville Performance SF600 Alum

215/-

2.08/1.60
4.25
No Pipe

N/A

-/53

-/104

-/162

-/196

-/199

-/197

-/194

-
-
-
.421/.324

Canfield 23-600-65 Alum

220/-

2.08/1.60
-
No Pipe

72/52
72.2%

145/105
72.4%

206/146
70.9%
60.6/72.6
180/215
.72/.663

252/184
73%
74.2/91.5
220/271
.66/.627

288/203
70.5%
84.8/101
251/299
.604/.553

302/219
72.5%
88.9/109
263/323
.528/.497

306/227
74.2%
90.1/113
267/335
.458/.442

250/181
72.3%
1.39
.421/.324

Canfield 220 Ported Smithberg Racing Alum

N/A

2.08/1.60
4.155

66/-

132/-

197/-
58
172
.688

248/-
73
216
.65

289/-
85.1
252
.606

308/-
90.6
269
.538

323/-
95.1
282
.484

332/-
97.7
289
.435

337/-
99.2
294
.392

339/-
99.8
296
.355

278
-
-
.421/.324

CGM Motorsports 200 23 Deg CNC SF1020 Alum

200/-

2.02/1.60

N/A

64/57
89.1%

114/101
88.6%

161/128
79.5%
50.2/63.7
149/189
.579/.581

201/152
75.6%
62.7/75.6
186/224
.542/.518

232/159
68.5%
72.4/79.1
214/234
.501/.433

251/169
67.3%
78.3/84.1
232/249
.452/.384

192/142
73.9%
1.26
.409/.324

CGM Motorsports 210 23 Deg CNC SF1020 Alum

210/-

2.02/1.60

N/A

71/57
80.3%

146/101
69.2%

204/157
77%
63.7/78.1
189/231
.734/.713

250/177
70.8%
78/88
231/261
.675/.603

261/186
71.3%
81.4/92.5
241/274
.563/.507

266/190
71.4%
83/94.5
246/280
.478/.431

276/195
70.7%
86.1/97
255/287
.426/.38

234/168
71.7%
1.31
.409/.324

Competition Products Alum CHP

195/60

2.02/1.60

59/50
84.7%

112/91
81.3%

152/122
80.3%
47.4/60.7
141/180
.547/.554

194/152
78.4%
60.5/75.6
179/224
.523/.518

231/167
72.3%
72.1/83.1
214/246
.499/.455

256/172
67.2%
79.9/85.5
237/253
.461/.391

189/141
74.5%
1.31/2.87
.409/.324

Dart Sportsman II 200 Ported Smithberg Racing Iron

210/-

2.08/1.60
4.155

N/A

72/-

138/-

195/-
57.4
170
.681

239/-
70.3
208
.626

266/-
78.3
232
.558

278/-
81.8
242
.486

287/-
84.5
250
.43

294/-
86.5
256
.385

242
-
1.40
.421/.324

Dart 165 Iron Eagle

165/-

1.94/1.50

126/108
85.7%

185/128
69.2%
62.6/72.4
185/215
.693/.62

221/136
61.5%
74.8/77
222/228
.621/.494

232/138
59.5%
78.5/78.1
233/231
.521/.401

191/128
66.8%
1.41
.393/.304

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart 165 Iron Eagle

165/65

1.94/1.50
4.03
No Pipe

210/138
65.7%
71/78.1
211/231
.472/.401

-
-
1.27/2.12
.393/.304

Dart 180 Iron Eagle

180/75

2.02/1.60
4.03
No Pipe

65.9

139/114
82%

190/145
76.3%
59.3/72.1
176/214
.684/.659

218/164
75.2%
68/81.6
202/242
.588/.559

222/172
77.5%
69.3/85.5
205/253
.479/.469

218/174
79.8%
68/86.5
202/256
.392/.395

197/154
77.9%
1.23/2.32
.409/.324

Dart 180 Iron Eagle Meaux Racing Out of Box

180/75

2.02/1.60
4.00
No Pipe

N/A

127/102
80.3%

181/137
75.7%
56.5/68.1
167/202
.651/.622

212/161
75.9%
66.2/80.1
196/237
.572/.548

218/175
80.3%
68/87
202/258
.471/.477

219/180
82.2%
68.3/89.5
202/265
.394/.409

191/151
78.9%
1.22/2.40
.409/.324

Dart 180 Iron Eagle Tri-Mark

180/75

2.02/1.60

N/A

62/63
101%

127/115
90.6%

180/147
81.7%
56.2/73.1
166/217
.648/.668

209/163
78%
65.2/81.1
193/240
.564/.555

209/168
80.4%
65.2/83.6
193/248
.451/.458

209/171
81.8%
65.2/85
193/252
.376/.388

208/176
84.6%
64.9/87.5
192/259
.321/.343

190/157
82.3%
1.16/2.35
.409/.324

Dart 180 Iron Eagle Ported Tri-Mark Stealth

N/A

2.02/1.60

N/A

68/61
89.7%

134/112
83.6%

188/150
79.8%
58.7/74.6
174/221
.676/.681

228/170
74.6%
71.1/84.6
211/251
.615/.579

244/181
74.2%
76.1/90
226/267
.527/.493

248/184
74.2%
77.4/91.5
229/271
.446/.418

249/190
76.3%
77.7/94.5
230/280
.384/.37

215/165
76.5%
-
.409/.324

Dart 180 Iron Eagle Ported Modern Cylinder Head

N/A

2.02/1.60

N/A

68/62
91.2%

144/108
75%

201/158
78.6%
62.7/78.6
186/233
.723/.718

238/193
81.1%
74.3/96
220/284
.642/.657

252/201
79.8%
78.6/100
233/296
.544/.548

260/203
78.1%
81.1/101
240/299
.468/.461

249/190
76.3%
77.7/94.5
230/280
.384/.37

224/176
78.3%
-
.409/.324

Dart 200 Iron Eagle

200/75

2.02/1.60
4.03
No Pipe

65.9

129/114
88.4%

186/145
78%
58/72.1
172/214
.669/.659

229/164
71.6%
71.5/81.6
212/242
.618/.559

261/172
65.9%
81.4/85.5
241/253
.563/.469

252/174
69%
78.6/86.5
233/256
.453/.395

211/154
72.8%
1.31/2.32
.409/.324

Dart 200 Iron Eagle Tri-Mark

200/75

2.02/1.60

N/A

68/63
92.6%

134/115
85.8%

186/147
79%
58/73.1
172/217
.669/.668

226/163
72.1%
70.5/81.1
209/240
.61/.555

231/168
72.7%
72.1/83.6
214/248
.499/.458

231/171
74%
72.1/85
214/252
.416/.388

230/176
76.5%
71.8/87.5
213/259
.355/.343

206/157
75.9%
1.16/2.35
.409/.324

Dart 200 Iron Eagle Ported Tri-Mark Stealth

N/A

2.02/1.60

N/A

70/61
87.1%

135/112
83%

194/150
77.3%
60.5/74.6
179/221
.698/.681

232/170
73.3%
72.4/84.6
214/251
.626/.579

245/181
73.9%
76.4/90
227/267
.529/.493

253/184
72.7%
78.9/91.5
234/271
.455/.418

261/190
72.8%
81.4/94.5
241/280
.402/.37

220/165
74.8%
-
.409/.324

Dart Iron Eagle CHP

N/A

2.05/1.60

N/A

65/59
90.8%

129/112
86.8%

182/139
76.4%
55.1/69.1
163/205
.645/.631

226/166
73.5%
68.5/82.6
203/245
.601/.565

258/178
69%
78.2/88.5
232/262
.549/.485

255/187
73.3%
77.3/93
229/276
.452/.425

210/156
74.5%
-
.415/.324

Dart Iron Eagle 23 Deg CNC Rons Porting Service 220 Alum

220/-

2.05/1.60

152/111
73%

203/149
73.4%
61.5/74.1
182/220
.72/.677

250/182
72.8%
75.7/90.5
224/268
.665/.62

288/215
74.7%
87.3/107
259/317
.613/.586

308/229
74.4%
93.3/114
276/337
.546/.52

317/246
77.6%
96/122
285/363
.482/.479

253/189
74.6%
1.44
.415/.324

Dart Iron Eagle 23 Deg CNC Rons Porting Service 228 Alum

228/-

2.08/1.60

143/111
77.6%

203/149
73.4%
59.7/74.1
177/220
.709/.677

251/182
72.5%
73.9/90.5
219/268
.658/.62

284/215
75.7%
83.6/107
248/317
.595/.586

313/229
73.2%
92.1/114
273/337
.547/.52

326/242
74.2%
95.9/120
284/357
.488/.471

253/188
74.2%
1.43
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart Iron Eagle 23 Deg CNC Rons Porting Service 238 Alum

238/-

2.10/1.60

149/111
74.5%

212/149
70.3%
61.2/74.1
181/220
.734/.677

263/182
69.2%
75.9/90.5
225/268
.683/.62

296/215
72.6%
85.5/107
253/317
.615/.586

314/229
72.9%
90.7/114
269/337
.543/.52

322/242
75.2%
93/120
275/357
.478/.471

259/188
72.5%
1.35
.425/.324

Dart Iron Eagle 23 Deg CNC Rons Porting Service 248 Alum

248/-

2.10/1.60

146/111
76%

208/149
71.6%
60.1/74.1
178/220
.72/.677

256/182
71.1%
73.9/90.5
219/268
.664/.62

294/215
73.1%
84.9/107
252/317
.61/.586

324/229
70.7%
93.5/114
277/337
.561/.52

338/242
71.6%
97.6/120
289/357
.501/.471

261/188
72%
1.36
.425/.324

Dart 215 Iron Eagle

215/-

2.055/1.60
4.03
No pipe

65.9

127/114
89.8%

178/145
81.5%
53.7/72.1
159/214
.629/.659

216/164
75.9%
65.1/81.6
193/242
.573/.559

249/172
69.1%
75.1/85.5
222/253
.528/.469

268/174
64.9%
80.8/86.5
239/256
.474/.395

271/-
81.7
242
.411

218/154
-
1.26
.416/.324

Dart 230 Iron Eagle

230/-

2.08/1.60
4.155
No Pipe

65.9

129/115
89.1%

184/158
85.9%
54.2/78.6
160/233
.643/.718

231/185
80.1%
68/92
201/273
.605/.63

271/199
73.4%
79.8/99
236/293
.568/.542

296/205
69.3%
87.1/102
258/302
.517/.466

308/207
67.2%
90.6/103
269/305
.461/.403

308/-
90.6
269
.404

247/178
-
1.34
.421/.324

Dart 230 Iron Eagle Ported Kelford Cams

N/A

2.08/1.60

N/A

73/59
80.8%

132/127
96.2%

186/171
91.9%
54.7/85
162/252
.65/.777

239/204
85.4%
70.3/101
208/301
.626/.695

275/224
81.5%
80.9/111
240/330
.576/.61

312/233
74.7%
91.8/116
272/343
.545/.529

319/239
74.9%
93.9/119
278/352
.478/.465

244/200
81.9%
-
.421/.324

Dart 230 Iron Eagle Out of Box Steve SF600

230/-

2.08/1.60

N/A

64/46
71.9%

132/95
72%

185/135
73%
54.4/67.1
161/199
.646/.613

227/159
70%
66.8/79.1
198/234
.595/.542

243/168
69.1%
71.5/83.6
212/248
.509/.458

197/139
70.8%
1.06
.421/.324

Dart 230 Iron Eagle Ported Steve SF600

N/A

2.08/1.60

N/A

69/50
72.5%

133/102
76.7%

195/145
74.4%
57.4/72.1
170/214
.681/.659

247/177
71.7%
72.7/88
215/261
.647/.603

280/192
68.6%
82.4/95.5
244/283
.587/.523

214/154
72%
-
.421/.324

Dart 227 Iron Eagle Pro

227/-

2.08/1.60
-
No Pipe

131/96
73.3%

195/135
69.2%
57.4/67.1
170/199
.681/.613

248/169
68.1%
73/84.1
216/249
.65/.576

283/193
68.2%
83.3/96
247/284
.593/.526

297/208
70%
87.4/103
259/307
.519/.472

304/217
71.4%
89.5/108
265/320
.455/.422

243/170
69.8%
1.34
.421/.324

Dart 200 Iron Eagle Platinum SF600

200/-

2.02/1.60
4.03
No Pipe

N/A

130/109
83.8%

194/158
81.4%
60.5/78.6
179/233
.698/.718

242/198
81.8%
75.5/98.5
224/292
.653/.675

274/208
75.9%
85.5/103
253/307
.591/.567

283/214
75.6%
88.3/106
262/315
.509/.486

-/219

225/177
79%
1.42
.409/.324

Dart 200 Iron Eagle Platinum CNC M2 Race Systems

223/-

2.055/1.60
4.03

N/A

70/40
57.1%

151/96
63.6%

198/135
68.2%
59.7/67.1
177/199
.70/.613

248/175
70.6%
74.8/87
222/258
.658/.596

283/206
72.8%
85.3/102
253/304
.60/.561

301/225
74.8%
90.8/112
269/332
.532/.511

304/233
76.6%
91.7/116
272/343
.461/.454

248/178
72.1%
1.36
.416/.324

Dart 200 Iron Eagle Platinum Ported Bullet Cylinder Heads

217/90

2.05/1.60

74/63
85.1%

144/111
77.1%

203/161
79.3%
61.5/80.1
182/237
.72/.731

247/188
76.1%
74.8/93.5
222/277
.657/.64

282/209
74.1%
85.4/104
253/308
.60/.57

291/218
74.9%
88.2/108
261/321
.516/.495

301/226
75.1%
91.2/112
270/333
.457/.44

245/186
75.8%
1.39/2.51
.415/.324

Dart 215 Iron Eagle Platinum SF600

215/75

2.05/1.60
4.03
No Pipe

N/A

136/109
80.1%

193/158
81.9%
58.5/78.6
173/233
.684/.718

239/198
82.8%
72.4/98.5
215/292
.635/.675

273/208
76.2%
82.7/103
245/307
.581/.567

289/214
74%
87.6/106
259/315
.512/.486

293/219
74.7%
88.8/109
263/323
.445/.426

237/184
77.7%
1.36/2.92
.415/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart 215 Iron Eagle Platinum CHP

215/-

2.055/1.60

63/56
88.9%

132/106
80.3%

180/133
73.9%
54.3/66.1
161/196
.637/.604

220/162
73.6%
66.3/80.6
197/239
.584/.552

251/178
70.9%
75.7/88.5
224/262
.533/.485

272/182
66.9%
82/90.5
243/268
.481/.413

211/152
72.1%
1.27
.416/.324

Dart 215 Iron Eagle Platinum Weingartner Racing Back Cut

N/A

2.055/1.60
4.155
No Pipe

N/A

63/53
84.1%

141/103
73%

182/139
76.4%
54.9/69.1
163/205
.644/.631

215/168
78.1%
64.8/83.6
192/248
.57/.572

241/168
69.7%
72.7/83.6
215/248
.511/.458

250/197
78.8%
75.4/98
223/290
.442/.447

248/204
82.3%
74.8/101
222/301
.376/.397

235/208
88.5%
70.9/103
210/307
.312/.354

234/208
88.9%
70.6/103
209/307
.276/.315

218/174
79.9%
-
.416/.324

Dart 215 Iron Eagle Platinum Competition Engines SF600

215/-

2.055/1.60
4.03
No Pipe

N/A

130/102
78.5%

181/132
72.9%
54.6/65.7
162/195
.64/.60

221/157
71%
66.6/78.1
197/231
.586/.535

248/175
70.6%
74.8/87
222/258
.526/.477

264/185
70.1%
79.6/92
236/273
.467/.42

268/191
71.3%
80.8/95
239/281
.406/.372

219/157
71.8%
1.25
.416/.324

Dart 230 Iron Eagle Platinum SF600

230/75

2.08/1.60
4.15
No Pipe

N/A

138/109
79%

201/158
78.6%
59.2/78.6
175/233
.702/.718

247/198
80.2%
72.7/98.5
215/292
.647/.675

280/208
74.3%
82.4/103
244/307
.587/.567

297/214
72.1%
87.4/106
259/315
.519/.486

306/219
71.6%
90.1/109
267/323
.458/.426

245/184
75.3%
1.33/2.92
.421/.324

Dart 230 Iron Eagle Platinum Out of Box Weingartner Racing

N/A

2.08/1.60
4.125
No Pipe

N/A

66/50
75.8%

130/115
88.5%

174/149
85.6%
51.2/74.1
152/220
.608/.677

226/178
78.8%
66.5/88.5
197/262
.592/.606

252/192
76.2%
74.2/95.5
220/283
.528/.523

277/201
72.6%
81.5/100
242/296
.484/.456

281/207
73.7%
82.7/103
245/305
.421/.403

280/211
75.4%
82.4/105
244/311
.367/.359

231/179
77.3%
-
.421/.324

Dart 215 Platinum Ported Mike Jones Iron

215/-

2.08/1.60

N/A

73/55
75.3%

136/110
80.9%

194/155
79.9%
57.1/77.1
169/228
.678/.704

239/187
78.2%
70.3/93
208/276
.626/.637

279/213
76.3%
82.1/106
243/314
.585/.58

300/233
77.7%
88.3/116
262/343
.524/.529

313/239
76.4%
92.1/119
273/352
.469/.465

244/190
77.8%
1.46
.421/.324

Dart Iron Eagle Platinum Meaux Racing Out of Box SF600

237.3/-

2.08/1.60
4.00
No Pipe

119/107
89.9%

172/142
82.6%
50.6/70.6
150/209
.601/.645

215/167
77.7%
63.3/83.1
187/246
.563/.569

248/184
74.2%
73/91.5
216/271
.52/.501

272/197
72.4%
80/98
237/290
.475/.447

276/205
74.3%
81.2/102
241/302
.413/.399

281/210
74.7%
82.7/104
245/309
.368/.358

226/173
76.6%
-
.421/.324

Dart SHP 180 Alum

180/75

2.02/1.60
-
No Pipe

64/72

139/114
82%

190/145
76.3%
59.3/72.1
176/214
.684/.659

218/164
75.2%
68/81.6
202/242
.588/.559

222/172
77.5%
69.3/85.5
205/253
.479/.469

218/174
79.8%
68/86.5
202/256
.392/.395

197/154
77.9%
1.23/2.32
.409/.324

Dart SHP 200 Alum

200/75

2.02/1.60
-
No Pipe

64/72

129/114
88.4%

186/145
78%
58/72.1
172/214
.669/.659

229/164
71.6%
71.5/81.6
212/242
.618/.559

261/172
65.9%
81.4/85.5
241/253
.563/.469

252/174
69%
78.6/86.5
233/256
.453/.395

211/154
72.8%
1.31/2.32
.409/.324

Dart PRO1 180 Alum

180/74

2.02/1.60
4.03
No Pipe

N/A

134/114
85.1%

187/145
77.5%
58.4/72.1
173/214
.673/.659

231/164
71%
72.1/81.6
214/242
.623/.559

257/172
66.9%
80.2/85.5
238/253
.555/.469

261/174
66.7%
81.4/86.5
241/256
.469/.395

264/175
66.3%
82.4/87
244/258
.407/.341

222/157
70.8%
1.47/2.36
.409/.324

Dart PRO1 200 Alum

200/-

2.02/1.60
-
No Pipe

64/72

129/114
88.4%

185/145
78.4%
57.7/72.1
171/214
.666/.659

229/164
71.6%
71.5/81.6
212/242
.618/.559

261/172
65.9%
81.4/85.5
241/253
.563/.469

263/174
66.2%
82.1/86.5
243/256
.473/.395

213/154
72.1%
1.32
.409/.324

Dart PRO1 200 Bowl Cleanup Alum

200/-

2.05/1.60

N/A

209/155
74.2%
63.3/77.1
188/228
.741/.704

237/193
81.4%
71.8/96
213/284
.63/.657

269/216
80.3%
81.5/107
241/318
.572/.589

281/222
79%
85.1/110
252/327
.498/.504

249/197
78.9%
1.41
.415/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart PRO1 200 Ported Bullet Cylinder Heads Alum

227/90

2.05/1.60

79/56
70.9%

144/117
81.3%

200/161
80.5%
60.6/80.1
180/237
.709/.731

247/194
78.5%
74.8/96.5
222/286
.657/.661

281/217
77.2%
85.1/108
252/320
.598/.591

303/226
74.6%
91.8/112
272/333
.537/.513

311/230
74%
94.2/114
279/339
.473/.448

248/191
77.1%
1.37/2.56
.415/.324

Dart PRO1 215 Alum

215/-

2.05/1.60
-
No pipe

64/72

127/114
89.8%

178/145
81.5%
53.9/72.1
160/214
.631/.659

216/164
75.9%
65.4/81.6
194/242
.574/.559

249/172
69.1%
75.4/85.5
224/253
.53/.469

268/174
64.9%
81.2/86.5
241/256
.475/.395

271/-
82.1
243
.412

218/154
-
1.26
.415/.324

Dart PRO1 215 Out of Box Weingartner Racing

N/A

2.055/1.60
4.125
No Pipe

N/A

65/52
80%

138/106
76.8%

198/138
69.7%
59.7/68.6
177/203
.70/.627

243/165
67.9%
73.3/82.1
217/243
.645/.562

273/178
65.2%
82.3/88.5
244/262
.579/.485

269/186
69.1%
81.1/92.5
240/274
.476/.422

268/189
70.5%
80.8/94
239/279
.406/.368

265/191
72.1%
79.9/95
237/281
.351/.325

236/165
69.7%
-
.416/.324

Dart PRO1 215 Out of Box Jake Alum

N/A

2.055/1.60

N/A

63/52
82.5%

134/110
82.1%

184/135
73.4%
55.5/67.1
164/199
.651/.613

225/163
72.4%
67.8/81.1
201/240
.597/.555

255/181
71%
76.9/90
228/267
.541/.493

265/193
72.8%
79.9/96
237/284
.469/.438

255/199
78%
76.9/99
228/293
.386/.387

220/164
74.4%
-
.416/.324

Dart PRO1 215 Ported Mike Start Alum

215/-

2.08/1.60
4.030
No Pipe

N/A

80/68
85%

148/127
85.8%

200/180
90%
58.9/89.5
174/265
.699/.818

244/207
84.8%
71.8/103
213/305
.639/.705

281/220
78.3%
82.7/109
245/324
.589/.60

303/225
74.3%
89.2/112
264/332
.529/.511

308/232
75.3%
90.6/115
269/342
.461/.452

247/199
80.3%
1.43
.421/.324

Dart PRO1 215 Ported Mike Stark Saenz 680 Alum

N/A

2.055/1.60
4.155

N/A

74/58
78.4%

148/109
73.6%

210/147
70%
63.3/73.1
188/217
.743/.668

260/181
69.6%
78.4/90
232/267
.69/.617

296/203
68.6%
89.2/101
264/299
.628/.553

312/218
69.9%
94.1/108
279/321
.552/.495

318/227
71.4%
95.9/113
284/335
.482/.442

320/232
72.5%
96.5/115
286/342
.424/.395

321/234
72.9%
96.8/116
287/345
.378/.354

273/194
71%
-
.416/.324

Dart PRO1 215 Ported Meaux Racing SF600 Alum

215/-

2.125/1.60
4.125
No Pipe

N/A

147/111
75.5%

215/161
74.9%
60.6/80.1
180/237
.735/.731

260/204
78.5%
73.3/101
217/301
.667/.695

293/228
77.8%
82.6/113
245/336
.601/.621

304/240
78.9%
85.7/119
254/354
.52/.545

311/244
78.5%
87.7/121
260/360
.456/.475

319/243
76.2%
89.9/121
267/358
.409/.414

264/204
77.4%
1.48
.430/.324

Dart PRO1 215 Ported Meaux Racing Welded Pushrod Area SF600 Alum

215/-

2.125/1.60
4.125
No Pipe

N/A

147/111
75.5%

215/161
74.9%
60.6/80.1
180/237
.735/.731

262/204
77.9%
73.9/101
219/301
.672/.695

293/228
77.8%
82.6/113
245/336
.601/.621

314/240
76.4%
88.5/119
262/354
.537/.545

319/244
76.5%
89.9/121
267/360
.468/.475

323/243
75.2%
91.1/121
270/358
.414/.414

268/204
76.4%
1.50
.430/.324

Dart PRO1 227 CNC Full Port Alum

227/85

2.08/1.625
4.155
No Pipe

158/117
74.1%

209/149
71.3%
61.5/71.8
182/213
.73/.666

257/182
70.8%
75.6/87.8
224/260
.673/.61

293/211
72%
86.2/102
255/301
.614/.566

302/220
72.8%
88.9/106
263/314
.528/.492

309/226
73.1%
90.9/109
269/323
.463/.433

314/232
73.9%
92.4/112
274/331
.411/.389

263/191
72.6%
1.38/2.73
.421/.329

Dart PRO1 Ported Alum

238/-

2.125/1.60
-
No Pipe

N/A

147/113
76.9%

199/155
77.9%
56.1/77.1
166/228
.681/.704

250/184
73.6%
70.5/91.5
209/271
.641/.627

288/204
70.8%
81.2/101
241/301
.591/.556

306/216
70.6%
86.3/107
256/318
.523/.491

238/174
73.3%
1.29
.430/.324

Dart PRO1 230 Alum

230/-

2.08/1.60
-
No Pipe

64/72

129/115
89.1%

184/158
85.9%
54.2/78.6
160/233
.643/.718

231/185
80.1%
68/92
201/273
.605/.63

271/199
73.4%
79.8/99
236/293
.568/.542

296/205
69.3%
87.1/102
258/302
.517/.466

308/207
67.2%
90.6/103
269/305
.461/.403

237/178
75.3%
1.34
.421/.324

Dart PRO1 230 Dr Js Performance Alum

N/A

2.08/1.60
-
Pipe

N/A

61/51
83.6%

115/103
89.6%

168/135
80.4%
49.4/67.1
146/199
.587/.613

216/166
76.9%
63.6/82.6
188/245
.566/.565

254/187
73.6%
74.8/93
221/276
.532/.51

258/202
78.3%
75.9/100
225/298
.451/.459

262/212
80.9%
77.1/105
228/312
.392/.413

212/168
78.9%
-
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart PRO1 230 CNC Dr Js Performance Alum

N/A

2.08/1.60
-
Pipe

N/A

71/67
94.4%

141/120
85.1%

207/162
78.3%
60.9/80.6
181/239
.723/.736

257/195
75.9%
75.6/97
224/287
.673/.664

289/219
75.8%
85.1/109
252/323
.606/.597

300/232
77.3%
88.3/115
262/342
.524/.527

309/244
79%
90.9/121
269/360
.463/.475

251/195
78%
-
.421/.324

Dart PRO1 Ported 3V Performance Alum

N/A

2.08/-

N/A

80/-

145/-

210/-
61.8
183
.734

267/-
78.6
233
.70

305/-
89.8
266
.639

327/-
96.2
285
.571

338/-
99.5
295
.506

344/-
101
300
.451

346/-
102
302
.403

285
-
-
.421

Dart Platinum 23 Deg CNC Rons Porting Service 220 Alum

220/-

2.05/1.60

152/111
73%

203/149
73.4%
61.5/74.1
182/220
.72/.677

250/182
72.8%
75.7/90.5
224/268
.665/.62

288/215
74.7%
87.3/107
259/317
.613/.586

308/229
74.4%
93.3/114
276/337
.546/.52

317/242
76.3%
96/120
285/357
.482/.471

253/188
74.3%
1.44
.415/.324

Dart Platinum 23 Deg CNC Rons Porting Service 238 Alum

238/-

2.10/1.60

143/111
77.6%

203/149
73.4%
58.6/74.1
174/220
.703/.677

251/182
72.5%
72.5/90.5
215/268
.651/.62

284/215
75.7%
82/107
243/317
.59/.586

313/229
73.2%
90.4/114
268/337
.542/.52

326/242
74.2%
94.1/120
279/357
.484/.471

253/188
74.2%
1.37
.425/.324

Dart Platinum 23 Deg CNC Rons Porting Service 240 Alum

240/-

2.125/1.60

143/111
77.6%

203/149
73.4%
57.2/74.1
170/220
.694/.677

254/182
71.7%
71.6/90.5
212/268
.651/.62

294/215
73.1%
82.9/107
246/317
.603/.586

317/229
72.2%
89.4/114
265/337
.542/.52

328/242
73.8%
92.5/120
274/357
.481/.471

257/188
73.3%
1.37
.430/.324

Dart 23 Deg 220-225 Super Mod Alum

225/88

2.08/1.625
4.155
No Pipe

N/A

138/122
88.4%

201/168
83.6%
59.2/81
175/240
.702/.751

253/192
75.9%
74.5/92.6
221/274
.663/.644

279/207
74.2%
82.1/99.8
243/296
.585/.555

284/211
74.3%
83.6/102
248/301
.496/.472

282/213
75.5%
83/103
246/304
.422/.408

240/186
77.5%
1.26/2.42
.421/.329

Dart 23 Deg 220-232 Full Port Alum

232/98

2.08/1.60
4.155
No Pipe

N/A

144/121
84%

208/169
81.3%
61.2/84.1
181/249
.727/.768

258/216
83.7%
75.9/107
225/318
.676/.736

296/238
80.4%
87.1/118
258/351
.621/.649

311/244
78.5%
91.5/121
271/360
.543/.554

316/250
79.1%
93/124
276/368
.473/.487

256/206
80.8%
1.36/2.55
.421/.324

Dart 23 Deg 220 Full Port No back Cut SF600 Alum

240/-

2.10/1.60
-
No Pipe

N/A

147/117
79.6%

202/189
93.6%
58.3/94
173/279
.699/.858

253/220
87%
73/109
216/324
.657/.749

287/236
82.2%
82.9/117
246/348
.596/.643

310/246
79.4%
89.5/122
265/363
.536/.559

320/250
78.1%
92.4/124
274/368
.475/.487

324/251
77.5%
93.5/125
277/370
.42/.428

263/216
81.9%
1.35
.425/.324

Dart 220 RR Full Port Alum

239/103

2.10/1.60
-
No Pipe

N/A

154/121
78.6%

223/168
75.3%
64.4/83.6
191/248
.772/.763

276/202
73.2%
79.7/100
236/298
.716/.688

311/229
73.6%
89.8/114
266/337
.646/.624

319/237
74.3%
92.1/118
273/349
.552/.538

323/243
75.2%
93.3/121
276/358
.479/.473

268/200
74.7%
1.35/2.36
.425/.324

Dart 220 RR CFE Full Port Alum

248/106

2.10/1.60
-
No Pipe

N/A

131/115
87.8%

199/154
77.4%
57.5/76.6
170/227
.689/.699

254/183
72%
73.3/91
217/270
.659/.623

289/220
76.1%
83.4/109
247/324
.60/.60

304/233
76.6%
87.8/116
260/343
.526/.529

304/240
78.9%
87.8/119
260/354
.451/.467

247/191
77.3%
1.23/2.26
.425/.324

Dart 220 Race Series Alum

248/-

2.10/1.60
-
No Pipe

147/117
79.6%

202/189
93.6%
58.3/94
173/279
.699/.858

253/220
87%
73/109
216/324
.657/.749

287/236
82.2%
82.9/117
246/348
.596/.643

310/246
79.4%
89.5/122
265/363
.536/.559

320/250
78.1%
92.4/124
274/368
.475/.487

324/251
77.5%
93.5/125
277/370
.42/.428

263/216
81.9%
1.31
.425/.324

Dart 18 Deg CNC Out of Box Weingartner Racing

N/A

2.14/1.60
4.125
No Pipe

N/A

80/52
65%

150/125
83.3%

220/161
73.2%
61.2/80.1
181/237
.747/.731

273/203
74.4%
75.9/101
225/299
.695/.692

311/226
72.7%
86.5/112
256/333
.634/.616

349/240
68.8%
97/119
287/354
.593/.545

338/248
73.4%
94/123
278/365
.492/.483

274/201
73.3%
-
.433/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart 18 Deg Super Mod SF600

246/105

2.15/1.60
-
No Pipe

N/A

165/131
79.4%

210/165
78.6%
57.8/82.1
171/243
.71/.749

270/195
72.2%
74.4/97
220/287
.684/.664

321/235
73.2%
88.4/117
262/346
.651/.64

353/249
70.5%
97.2/124
288/367
.597/.565

357/253
70.9%
98.3/126
291/373
.517/.492

279/205
73.3%
1.45/2.41
.435/.324

Dart 18 Deg Full Port No Back Cut SF600 Alum

252/105

2.15/1.60
4.155
No Pipe

N/A

132/101
76.5%

194/144
74.2%
53.4/71.6
158/212
.656/.654

252/198
78.6%
69.4/98.5
206/292
.639/.675

305/217
71.1%
84/108
249/320
.619/.591

347/227
65.4%
95.6/113
283/335
.586/.516

365/241
66%
101/120
298/355
.529/.469

358/241
67.3%
98.6/120
292/355
.454/.41

279/196
70.1%
1.45/2.30
.435/.324

Dart 18 Deg Full Port No Back Cut SF600 Alum

263/108

2.18/1.60
4.155
No Pipe

N/A

183/131
71.6%

243/169
69.5%
65.1/84.1
193/249
.81/.768

295/225
76.3%
79/112
234/332
.738/.766

342/246
71.9%
91.6/122
271/363
.684/.67

364/263
72.3%
97.5/131
289/388
.607/.597

368/268
72.8%
98.6/133
292/395
.526/.522

363/272
74.9%
97.3/135
288/401
.454/.463

308/225
72.9%
1.40/2.52
.441/.324

Dart 18 Deg Full Port SF600

275/110

2.18/1.60
-
No Pipe

N/A

165/131
79.4%

210/173
82.4%
56.3/86
167/255
.70/.786

272/230
84.6%
72.9/114
216/339
.68/.784

326/249
76.4%
87.3/124
259/367
.652/.679

360/263
73.1%
96.4/131
286/388
.60/.597

378/270
71.4%
101/134
300/398
.54/.526

285/219
76.9%
1.37/2.45
.441/.324

Dart 18 Deg Alum

257/-

2.15/1.60
4.155
No Pipe

N/A

145/114
78.6%

211/174
82.5%
58.1/86.5
172/256
.713/.79

270/217
80.4%
74.4/108
220/320
.684/.739

321/241
75.1%
88.4/120
262/355
.651/.657

346/251
72.5%
95.3/125
282/370
.585/.57

350/258
73.7%
96.4/128
286/380
.507/.502

340/262
77.1%
93.7/130
277/386
.431/.446

283/217
76.5%
1.36
.435/.324

Dart 18 Deg Alum

270/-

2.18/1.60
4.155
No Pipe

N/A

162/114
70.4%

232/174
75%
62.2/86.5
184/256
.773/.79

293/217
74.1%
78.5/108
233/320
.733/.739

332/241
72.6%
88.9/120
264/355
.664/.657

359/251
69.9%
96.2/125
285/370
.598/.57

366/258
70.5%
98.1/128
291/380
.523/.502

366/262
71.6%
98.1/130
291/386
.458/.446

301/217
71.9%
1.36
.441/.324

Dart 18 Deg Alum

N/A

2.18/1.60
-
No Pipe

139/111
79.9%

192/154
80.2%
51.4/76.6
152/227
.64/.699

250/216
86.4%
67/107
198/318
.625/.736

304/242
79.6%
81.4/120
241/357
.608/.66

346/254
73.4%
92.7/126
275/374
.577/.577

373/258
69.2%
99.9/128
296/380
.533/.502

380/262
68.9%
102/130
302/386
.475/.446

283/214
75.5%
-
.441/.324

Dart 18 Deg Ported Chris Frank Alum

N/A

-
4.175
No Pipe

N/A

141/103
73%

238/156
65.5%
-

298/206
69.1%
-

348/231
66.4%
-

381/242
63.5%
-

397/250
63%
-

408/262
64.2%
-

415/269
64.8%
-

420/273
65%
-

338/221
65.4%

Dart 16 Deg Full Port Intake Back Cut 45/39/32 SF600 Alum

263/108

2.15/1.60
-
No Pipe

N/A

145/119
82.1%

219/173
79%
60.3/86
179/255
.74/.786

280/213
76.1%
77.1/106
229/314
.71/.726

325/240
73.8%
89.5/119
265/354
.659/.654

358/257
71.8%
98.6/128
292/379
.605/.584

379/264
69.7%
104/131
309/389
.549/.514

383/268
70%
105/133
313/395
.485/.456

298/219
73.4%
1.46/2.48
.435/.324

Dart 16 Deg Full Port Lrg No Back Cut SF600 Alum

281/119

2.20/1.625
-
No Pipe

N/A

163/106
65%

228/149
65.4%
60/71.8
178/213
.753/.666

286/191
66.8%
75.2/92.1
223/273
.709/.641

340/219
64.4%
89.4/106
265/313
.674/.588

377/234
62.1%
99.2/113
294/334
.623/.523

387/247
63.8%
102/119
302/353
.548/.473

392/251
64%
103/121
306/359
.486/.421

310/200
64.3%
1.40/2.11
.446/.329

Dart 16 Deg Port Jones Engineering Alum

267/-

2.18/1.60

161/101
62.7%

231/149
64.5%
61.9/74.1
183/220
.77/.677

291/211
72.5%
78/105
231/311
.728/.719

337/237
70.3%
90.3/118
268/349
.674/.646

360/253
70.3%
96.4/126
286/373
.60/.575

371/263
70.9%
99.4/131
295/388
.53/.512

375/268
71.5%
100/133
298/395
.469/.456

304/212
69.7%
1.40
.441/.324

Dart 15 Deg Small Alum

276/111

2.15/1.60
-
No Pipe

392/-
108
320
.568

-/263

-
-
1.42
.435/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart 15 Deg Large Alum

281/113

2.20/1.60
-
No Pipe

-
-
-
.446/.324

Dart High Port 15 Deg - Darin Morgan SF600 Alum

N/A

2.18/1.625
-
No Pipe

N/A

136/111
81.6%

212/157
74.1%
56.8/75.7
168/224
.707/.702

281/214
76.2%
75.3/103
223/306
.703/.718

339/243
71.7%
90.8/117
269/347
.678/.652

379/258
68.1%
102/124
301/369
.632/.577

394/265
67.3%
106/128
313/379
.563/.508

396/271
68.4%
106/131
314/387
.495/.454

404/273
67.6%
108/132
321/390
.449/.407

-/275

318/224
70.5%
-
.441/.329

Dart Little Chief 11 Deg 275 I-50 E-55 SF1020 Alum

275/108

2.18/1.55
4.155
No Pipe

N/A

162/138
85.2%

240/186
77.5%
64.3/98.6
191/292
.80/.872

306/241
78.8%
82/128
243/378
.765/.847

350/266
76%
93.8/141
278/418
.70/.748

372/274
73.7%
99.7/145
295/430
.62/.642

376/278
73.9%
101/147
298/437
.537/.559

384/280
72.9%
103/148
305/440
.48/.492

389/282
72.5%
104/149
309/443
.432/.441

392/282
71.9%
105/149
311/443
.392/.397

330/247
75%
1.43/2.61
.441/.314

Dart Little Chief 11 Deg 315 I-55 E-55 SF1020 Alum

315/108

2.23/1.55
4.155
No Pipe

N/A

158/138
87.3%

235/186
79.1%
60.2/98.6
178/292
.766/.872

300/241
80.3%
76.8/128
228/378
.733/.847

352/266
75.6%
90.1/141
267/418
.688/.748

385/274
71.2%
98.6/145
292/430
.627/.642

401/278
69.3%
103/147
304/437
.56/.559

405/280
69.1%
104/148
307/440
.495/.492

410/282
68.8%
105/149
311/443
.445/.441

415/282
68%
106/149
315/443
.406/.397

340/247
72.8%
1.32/2.61
.452/.314

Dart Little Chief 11 Deg 315 I-55 E-55 SF1020 Alum

330/108

2.23/1.55
4.155
No Pipe

N/A

143/138
96.5%

233/186
79.8%
59.7/98.6
177/292
.759/.872

304/241
79.3%
77.8/128
231/378
.743/.847

360/266
73.9%
92.2/141
273/418
.704/.748

393/274
69.7%
101/145
298/430
.64/.642

405/278
68.6%
104/147
307/437
.566/.559

418/280
67%
107/148
317/440
.511/.492

425/282
66.4%
109/149
322/443
.462/.441

431/282
65.4%
110/149
327/443
.421/.397

346/247
71.6%
1.31/2.61
.452/.314

Dart Little Chief 11 Deg Ported MBE Alum

345/-

2.25/1.60
4.155
No Pipe

35-46

140/101
72.1%

222/140
63.1%
55.8/69.6
165/206
.717/.636

298/186
62.4%
74.9/92.5
222/274
.722/.634

360/236
65.6%
90.5/117
268/348
.698/.643

409/259
63.3%
103/129
305/382
.661/.588

429/268
62.5%
108/133
320/395
.594/.522

441/274
62.1%
111/136
329/404
.534/.467

457/-
115
341
.492

468/-
118
349
.453

358/209
-
1.36
.456/.324

Dart Little Chief 11 Deg Ported MBE I-55 E-55 SF600 Alum

347/-

2.27/1.55
4.155
No Pipe

N/A

151/101
66.9%

227/140
61.7%
56.1/74.2
166/220
.727/.656

303/186
61.4%
74.9/98.6
222/292
.728/.654

365/236
64.7%
90.2/125
267/371
.701/.664

413/259
62.7%
102/137
302/407
.661/.607

438/268
61.2%
108/142
321/421
.601/.539

444/274
61.7%
110/145
325/430
.533/.482

456/276
60.5%
113/146
334/433
.487/.431

462/-
114
338
.444

362/218
-
1.33
.460/.314

Dart 9 Deg Alum

299/215

2.20/1.625
-
No Pipe

70/54
77.1%

153/103
67.3%

227/156
68.7%
59.7/75.2
177/223
.75/.698

300/209
69.7%
78.9/101
234/299
.743/.701

360/243
67.5%
94.7/117
281/347
.714/.652

406/266
65.5%
107/128
316/380
.671/.595

421/279
66.3%
111/135
328/399
.596/.535

311/209
67.3%
1.41/1.30
.446/.329

Dart 9 Deg Alum

N/A

2.21/1.625
4.40
No Pipe

225/162
72%
58.7/78.1
174/231
.74/.724

298/215
72.1%
77.7/104
230/307
.735/.721

348/245
70.4%
90.7/118
269/350
.687/.657

375/260
69.3%
97.8/125
290/371
.617/.581

388/267
68.8%
101/129
300/381
.547/.512

394/275
69.8%
103/133
304/393
.486/.461

338/237
70.2%
-
.448/.329

Edelbrock E-Street 5073, 5089 SF1020 Alum

185/60

2.02/1.60

64/70

63/51
81%

125/99
79.2%

182/131
72%
56.8/65.2
168/193
.655/.595

225/153
68%
70.2/76.1
208/225
.607/.521

248/163
65.7%
77.4/81.1
229/240
.535/.444

249/168
67.5%
77.7/83.6
230/248
.448/.382

206/143
69.4%
1.35/2.80
.409/.324

Edelbrock 6071, 6073 Alum OLD

170/60

2.02/1.60

72/61
84.7%

134/105
78.4%

188/140
74.5%
58.7/69.6
174/206
.676/.636

224/160
71.4%
69.9/79.6
207/236
.604/.545

233/172
73.8%
72.7/85.5
215/253
.503/.469

233/179
76.8%
72.7/89
215/264
.419/.407

202/151
74.7%
1.37/2.98
.409/.324

Edelbrock 60719 Performer RPM Straight Plug Alum

170/60

2.02/1.60

73/61
83.6%

140/108
77.1%

200/144
72%
62.4/71.6
185/212
.72/.654

238/163
68.5%
74.3/81.1
220/240
.642/.555

244/175
71.7%
76.1/87
226/258
.527/.477

244/183
75%
76.1/91
226/270
.439/.416

213/155
72.5%
1.44/3.05
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Edelbrock 60739 Performer RPM Angled Plug Alum

170/60

2.02/1.60

73/61
83.6%

140/108
77.1%

200/144
72%
62.4/71.6
185/212
.72/.654

238/163
68.5%
74.3/81.1
220/240
.642/.555

244/175
71.7%
76.1/87
226/258
.527/.477

244/183
75%
76.1/91
226/270
.439/.416

213/155
72.5%
1.44/3.05
.409/.324

Edelbrock 60859, 60879 Performer Centerbolt SF1020 Alum

165/60

2.02/1.60

64/54
84.4%

122/96
78.7%

177/124
70.1%
55.2/61.7
164/183
.637/.563

217/147
67.7%
67.7/73.1
201/217
.586/.501

229/166
72.5%
71.5/82.6
212/245
.494/.452

232/175
75.4%
72.4/87
214/258
.417/.397

195/142
72.5%
1.41/2.92
.409/.324

Edelbrock 60899, 60909, 60999 Performer RPM Alum

170/60

2.02/1.60

67/58
86.6%

130/108
83.1%

183/144
78.7%
57.1/71.6
169/212
.658/.654

226/169
74.8%
70.5/84.1
209/249
.61/.576

229/175
76.4%
71.5/87
212/258
.494/.477

232/182
78.4%
72.4/90.5
214/268
.417/.413

200/156
77.8%
1.36/3.03
.409/.324

Edelbrock Performer RPM 60899, 60999 SF1020 Alum

185/65

2.02/1.60

66/55
83.3%

129/98
76%

188/131
69.7%
58.7/65.2
174/193
.676/.595

228/152
66.7%
71.1/75.6
211/224
.615/.518

240/162
67.5%
74.9/80.6
222/239
.518/.441

241/168
69.7%
75.2/83.6
223/248
.434/.382

205/142
69.3%
1.30/2.58
.409/.324

Edelbrock Performer RPM 608979 SCCA SF1020 Alum

185/65

1.94/1.55

61/51
83.6%

127/95
74.8%

185/118
63.8%
62.6/62.5
185/185
.693/.553

217/131
60.4%
73.4/69.4
218/206
.61/.461

229/137
59.8%
77.5/72.6
230/215
.515/.385

237/140
59.1%
80.2/74.2
238/220
.444/.328

199/124
62.4%
1.28/2.15
.393/.314

Edelbrock Performer RPM '86 earlier 60759 SF1020 Alum

185/65

2.02/1.60

64/70

66/52
78.8%

127/97
76.4%

185/127
68.6%
57.7/63.2
171/187
.666/.577

230/146
63.5%
71.8/72.6
213/215
.621/.497

238/156
65.5%
74.3/77.6
220/230
.514/.425

239/162
67.8%
74.6/80.6
221/239
.43/.368

204/138
67.5%
1.29/2.49
.409/.324

Edelbrock 60899 Performer RPM Alum CHP

185/63

2.02/1.60

60/48
80%

125/96
76.8%

181/134
74%
56.5/66.6
167/197
.651/.609

223/161
72.2%
69.6/80.1
206/237
.602/.548

244/176
72.1%
76.1/87.5
226/259
.527/.48

193/142
73.4%
1.32/2.79
.409/.324

Edelbrock 6089 NPS Alum

N/A

2.02/1.60
4.016
No Pipe

N/A

65/54
83.1%

127/105
82.7%

180/137
76.1%
56.2/68.1
166/202
.648/.622

219/155
70.8%
68.3/77.1
202/228
.591/.528

240/163
67.9%
74.9/81.1
222/240
.518/.444

236/167
70.8%
73.6/83.1
218/246
.425/.379

200/145
72.6%
-
.409/.324

Edelbrock 60979 E-Tec 170 SF1020 Alum

170/70

1.94/1.55

64/54
84.4%

130/104
80%

186/140
75.3%
62.9/74.2
186/220
.697/.656

220/169
76.8%
74.4/89.6
221/265
.618/.594

232/183
78.9%
78.5/97
233/287
.521/.515

238/190
79.8%
80.5/101
239/298
.446/.445

201/157
78.1%
1.40/2.71
.393/.314

Edelbrock 60989 E-Tec 200 SF1020 Alum

200/80

2.02/1.60

67/57
85.1%

122/110
90.2%

175/153
87.4%
54.6/76.1
162/225
.63/.695

223/182
81.6%
69.6/90.5
206/268
.602/.62

252/196
77.8%
78.6/97.5
233/289
.544/.534

259/204
78.8%
80.8/101
239/301
.466/.463

265/207
78.1%
82.7/103
245/305
.409/.403

216/175
81.2%
1.33/2.59
.409/.324

Edelbrock E-210 Out of Box Weingartner Racing Alum

210/-

2.08/1.60
4.155
No Pipe

N/A

64/41
64.1%

132/88
66.7%

179/124
69.3%
52.7/61.7
156/183
.625/.563

220/147
66.8%
64.7/73.1
192/217
.576/.501

246/163
66.3%
72.4/81.1
215/240
.516/.444

259/172
66.4%
76.2/85.5
226/253
.452/.391

264/175
66.3%
77.7/87
230/258
.395/.341

263/177
67.3%
77.4/88
229/261
.345/.301

259/178
68.7%
76.2/88.5
226/262
.302/.269

259/-
76.2
226
.271

231/153
-
1.26
.421/.324

Edelbrock/ Chapman 61049 Alum

236/100

2.135/1.625
-
No Pipe

71/54
76.1%

159/108
67.9%

224/182
81.3%
62.6/87.8
185/260
.762/.814

273/222
81.3%
76.3/107
226/317
.697/.745

305/238
78%
85.2/115
252/340
.623/.639

314/250
79.6%
87.7/121
260/357
.534/.559

323/260
80.5%
90.2/125
267/371
.471/.498

266/210
78.8%
1.37/2.60
.432/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Edelbrock/ Chapman Victor 18 Deg 61069 Alum

252/100

2.18/1.625

72/54
75%

161/108
67.1%

232/182
78.4%
62.2/87.8
184/260
.773/.814

286/222
77.6%
76.6/107
227/317
.715/.745

321/238
74.1%
86/115
255/340
.642/.639

342/250
73.1%
91.6/121
271/357
.57/.559

345/260
75.4%
92.4/125
274/371
.493/.498

281/210
74.7%
1.37/2.60
.441/.329

Edelbrock 23 Deg. CNC Rons Porting Service Alum

236/-

2.10/1.60

168/116
69%

223/164
73.5%
64.4/81.6
191/242
.772/.745

281/210
74.7%
81.1/104
240/309
.729/.715

308/232
75.3%
88.9/115
263/342
.64/.632

322/238
73.9%
93/118
275/351
.557/.541

326/240
73.6%
94.1/119
279/354
.484/.467

328/242
73.8%
94.7/120
281/357
.426/.412

279/206
73.7%
1.39
.425/.324

Edelbrock 18 Deg. CNC Rons Porting Service Alum

278/-

2.18/1.625

150/125
83.3%

220/180
81.8%
58.9/86.8
175/257
.733/.805

281/224
79.7%
75.3/108
223/320
.703/.751

331/240
72.5%
88.7/116
263/343
.662/.644

362/248
68.5%
97/120
287/354
.603/.555

380/251
66.1%
102/121
302/359
.543/.481

385/254
66%
103/122
306/363
.481/.426

301/217
72.2%
1.38
.441/.329

Edelbrock 18 Deg. Ported Chad Speier I-50 E-50 Alum

N/A

2.18/1.60
4.155
2" Pipe

136/102
75%

212/148
69.8%
56.8/73.6
168/218
.707/.672

275/192
69.8%
73.7/95.5
218/283
.688/.654

325/229
70.5%
87.1/114
258/337
.65/.624

362/257
71%
97/128
287/379
.603/.584

383/268
70%
103/133
304/395
.547/.522

393/275
70%
105/137
312/405
.491/.468

395/278
70.4%
106/138
314/410
.439/.421

396/281
71%
106/140
314/414
.396/.383

320/226
70.6%
-
.441/.324

Edelbrock/ Chapman Victor 18 Deg 61089 Alum

256/100

2.18/1.625

72/54
75%

161/108
67.1%

233/182
78.1%
62.4/87.8
185/260
.777/.814

286/222
77.6%
76.6/107
227/317
.715/.745

321/238
74.1%
86/115
255/340
.642/.639

344/250
72.7%
92.2/121
273/357
.573/.559

348/260
74.7%
93.2/125
276/371
.497/.498

282/210
74.4%
1.36/2.60
.441/.329

Edelbrock/ Chapman Victor 18 Deg 61109 Alum

236/100

2.125/1.625

71/54
76.1%

159/108
67.9%

224/182
81.3%
63.2/87.8
187/260
.766/.814

273/222
81.3%
77/107
228/317
.70/.745

305/238
78%
86/115
255/340
.626/.639

314/250
79.6%
88.5/121
262/357
.537/.559

323/260
80.5%
91.1/125
270/371
.473/.498

266/210
78.8%
1.37/2.60
.430/.329

Edelbrock 61119 Victor 15 Deg. Ported Chapman Alum

283/100

2.18/1.625
-
No Pipe

63/48
76.2%

137/113
82.5%

215/177
82.3%
57.6/85.3
171/253
.717/.792

281/217
77.2%
75.3/105
223/310
.703/.728

327/240
73.4%
87.6/116
260/343
.654/.644

363/254
70%
97.3/122
288/363
.605/.568

381/260
68.2%
102/125
302/371
.544/.498

284/210
74%
1.35/2.60
.441/.329

Edelbrock 61129 Alum

252/100

2.18/1.625

72/54
75%

161/108
67.1%

232/182
78.4%
62.2/87.8
184/260
.773/.814

286/222
77.6%
76.6/107
227/317
.715/.745

321/238
74.1%
86/115
255/340
.642/.639

342/250
73.1%
91.6/121
271/357
.57/.559

345/260
75.4%
92.4/125
274/371
.493/.498

281/210
74.7%
1.37/2.60
.441/.329

Edelbrock 61139 Victor 15 Deg. Ported Chapman Alum

317/100

2.25/1.625
-
No Pipe

70/49
70%

142/118
83.1%

216/175
81%
54.3/84.4
161/250
.698/.783

280/212
75.7%
70.4/102
209/303
.678/.711

328/241
73.5%
82.5/116
244/344
.636/.647

368/257
69.8%
92.6/124
274/367
.594/.575

398/267
67.1%
100/129
297/381
.551/.512

404/271
67.1%
102/131
301/387
.489/.454

305/220
72.1%
1.27/2.71
.456/.329

Edelbrock 15 Deg. CNC Rons Porting Service Alum

272/-

2.18/1.625

153/110
71.9%

228/184
80.7%
61.1/88.7
181/263
.76/.823

292/229
78.4%
78.2/110
232/327
.73/.768

334/258
77.2%
89.5/124
265/369
.668/.692

366/268
73.2%
98.1/129
291/383
.61/.599

382/274
71.7%
102/132
303/391
.546/.525

293/221
75.4%
1.40
.441/.329

Edelbrock 15 Deg CNC RFD Alum

2.25/1.625

N/A

156/120
76.9%

228/180
78.9%
57.3/86.8
170/257
.736/.805

304/220
72.4%
76.5/106
227/314
.736/.738

363/246
67.8%
91.3/119
271/351
.703/.66

398/258
64.8%
100/124
297/369
.643/.577

410/269
65.6%
103/130
306/384
.568/.516

418/273
65.3%
105/132
311/390
.506/.458

422/280
66.4%
106/135
314/400
.454/.417

337/231
68.4%
8.12
.456/.329

Edelbrock 61149 Alum

256/100

2.18/1.625

72/54
75%

161/108
67.1%

233/182
78.1%
62.4/87.8
185/260
.777/.814

286/222
77.6%
76.6/107
227/317
.715/.745

321/238
74.1%
86/115
255/340
.642/.639

344/250
72.7%
92.2/121
273/357
.573/.559

348/260
74.7%
93.2/125
276/371
.497/.498

282/210
74.4%
1.36/2.60
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Edelbrock/ Chapman Victor 18 Deg 61159 Alum

246/100

2.15/1.625

72/54
75%

161/108
67.1%

232/182
78.4%
63.9/87.8
189/260
.784/.814

286/222
77.6%
78.8/107
233/317
.725/.745

321/238
74.1%
88.4/115
262/340
.651/.639

340/250
73.5%
93.7/121
277/357
.575/.559

342/260
76%
94.2/125
279/371
.495/.498

280/210
74.9%
1.39/2.60
.435/.329

Edelbrock 61169 Alum

266/100

2.18/1.625

71/54
76.1%

151/108
71.5%

226/182
80.5%
60.5/87.8
179/260
.753/.814

271/222
81.9%
72.6/107
215/317
.678/.745

323/238
73.7%
86.5/115
256/340
.646/.639

350/250
71.4%
93.8/121
278/357
.583/.559

355/260
73.2%
95.1/125
282/371
.507/.498

279/210
75.2%
1.33/2.60
.441/.329

Edelbrock 61179 Alum

270/105

2.18/1.625

71/51
71.8%

151/114
75.5%

226/180
79.6%
60.5/86.8
179/257
.753/.805

271/213
78.6%
72.6/103
215/304
.678/.714

323/240
74.3%
86.5/116
256/343
.646/.644

350/248
70.9%
93.8/120
278/354
.583/.555

355/255
71.8%
95.1/123
282/364
.507/.489

279/208
74.6%
1.31/2.43
.441/.329

Edelbrock 61189 Alum

246/100

2.18/1.625

72/54
75%

161/108
67.1%

232/182
78.4%
62.2/87.8
184/260
.773/.814

286/222
77.6%
76.6/107
227/317
.715/.745

321/238
74.1%
86/115
255/340
.642/.639

340/250
73.5%
91.1/121
270/357
.567/.559

342/260
76%
91.6/125
271/371
.489/.498

280/210
74.9%
1.39/2.60
.441/.329

Edelbrock 61199 Alum

266/100

2.18/1.625

71/54
76.1%

151/108
71.5%

226/182
80.5%
60.5/87.8
179/260
.753/.814

271/222
81.9%
72.6/107
215/317
.678/.745

323/238
73.7%
86.5/115
256/340
.646/.639

350/250
71.4%
93.8/121
278/357
.583/.559

355/260
73.2%
95.1/125
282/371
.507/.498

279/210
75.2%
1.33/2.60
.441/.329

Edelbrock/ Chapman Victor 23 Deg 61209 Alum

238/85

2.125/1.625
-
No Pipe

68/54
79.4%

147/106
72.1%

221/181
81.9%
62.3/87.3
185/259
.756/.809

265/212
80%
74.7/102
221/303
.68/.711

293/228
77.8%
82.6/110
245/326
.601/.612

312/235
75.3%
88/113
261/336
.534/.525

317/240
75.7%
89.4/116
265/343
.465/.46

259/200
77.3%
1.33/2.82
.430/.329

Edelbrock/ Chapman Victor 23 Deg 61229 Alum

243/85

2.125/1.625
-
No Pipe

67/54
80.6%

147/106
72.1%

221/181
81.9%
62.3/87.3
185/259
.756/.809

269/212
78.8%
75.8/102
225/303
.69/.711

299/228
76.3%
84.3/110
250/326
.614/.612

310/235
75.8%
87.4/113
259/336
.53/.525

315/240
76.2%
88.8/116
263/343
.462/.46

260/200
77%
1.30/2.82
.430/.329

Edelbrock/ Chapman Victor 23 Deg 61249 Alum

247/85

2.125/1.625
-
No Pipe

71/54
76.1%

146/106
72.6%

222/181
81.5%
62.6/87.3
185/259
.759/.809

268/212
79.1%
75.6/102
224/303
.687/.711

299/228
76.3%
84.3/110
250/326
.614/.612

314/235
74.8%
88.5/113
262/336
.537/.525

321/240
74.8%
90.5/116
268/343
.47/.46

262/200
76.6%
1.30/2.82
.430/.329

Edelbrock/ Chapman Victor 23 Deg 61209 Revised Smithberg Racing Alum

N/A

2.135/1.60
4.155
No Pipe

N/A

80/42
52.5%

166/98
59%

231/173
74.9%
64.5/86
191/255
.786/.786

281/209
74.4%
78.5/104
233/308
.717/.712

320/228
71.3%
89.4/113
265/336
.654/.621

338/241
71.3%
94.4/120
280/355
.575/.547

346/248
71.7%
96.6/123
286/365
.505/.483

351/257
73.2%
98/128
291/379
.448/.438

355/258
72.7%
99.2/128
294/380
.403/.391

360/258
71.7%
101/128
298/380
.368/.352

305/219
71.7%
-
.432/.324

Edelbrock Victor Jr. 23 Deg. 77569, 77579, 77589, 77599, 77619, 77629, 77639, 77649 SF1020 Alum

215/85

2.08/1.60

64/70

67/64
95.5%

119/112
94.1%

177/153
86.4%
52.1/76.1
154/225
.618/.695

226/188
83.2%
66.5/93.5
197/277
.592/.64

265/207
78.1%
78/103
231/305
.556/.564

281/217
77.2%
82.7/108
245/320
.491/.493

285/220
77.2%
83.9/109
249/324
.427/.428

226/183
81.1%
1.33/2.59
.421/.324

Edelbrock Victor Jr. 23 Deg. 7761 Alum CHP

N/A

2.08/1.60

N/A

69/57
82.6%

123/111
90.2%

173/145
83.8%
50.9/72.1
151/214
.604/.659

219/180
82.2%
64.5/89.5
191/265
.574/.613

255/198
77.6%
75/98.5
222/292
.535/.54

275/206
74.9%
80.9/102
240/304
.48/.468

284/206
72.5%
83.6/102
248/304
.425/.401

222/174
78.7%
-
.421/.324

Edelbrock Victor Jr. 23 Deg. Ported Bullet Cylinder Heads Alum

225/90

2.08/1.60

72/55
76.4%

144/107
74.3%

201/156
77.6%
59.2/77.6
175/230
.702/.709

255/185
72.5%
75/92
222/273
.668/.63

287/208
72.5%
84.5/103
250/307
.602/.567

297/221
74.4%
87.4/110
259/326
.519/.502

305/226
74.1%
89.8/112
266/333
.457/.44

248/184
74.1%
1.36/2.51
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

EngineQuest 167 23 Deg Out of Box Weingartner Racing Iron

167/-

2.02/1.60
4.125
No Pipe

70/64
91.4%

124/109
87.9%

173/158
91.3%
54/78.6
160/233
.622/.718

207/164
79.2%
64.6/81.6
191/242
.559/.559

230/167
72.6%
71.8/83.1
213/246
.496/.455

238/166
69.7%
74.3/82.6
220/245
.428/.377

241/166
68.9%
75.2/82.6
223/245
.372/.323

202/155
76.7%
1.44
.409/.324

EngineQuest CC180BA 23 Deg Iron

180/-

2.02/1.60
-
No Pipe

65/55
84.6%

130/107
82.3%

178/133
74.7%
55.5/66.1
165/196
.64/.604

213/157
73.7%
66.5/78.1
197/231
.575/.535

235/174
74%
73.3/86.5
217/256
.507/.474

242/183
75.6%
75.5/91
224/270
.435/.416

244/188
77%
76.1/93.5
226/277
.376/.366

207/157
75.8%
1.36
.409/.324

EngineQuest CC200BA 23 Deg Iron

200/-

2.02/1.60
-
No Pipe

75/65
86.7%

137/113
82.5%

186/147
79%
58/73.1
172/217
.669/.668

225/170
75.6%
70.2/84.6
208/251
.607/.579

252/182
72.2%
78.6/90.5
233/268
.544/.496

265/188
70.9%
82.7/93.5
245/277
.477/.427

272/189
69.5%
84.9/94
251/279
.419/.368

223/165
74%
1.36
.409/.324

EngineQuest AC200BS 23 Deg Out of Box Shaver Alum

197/-

2.02/1.60

59/51
86.4%

122/101
82.8%

176/139
79%
54.9/69.1
163/205
.633/.631

217/167
77%
67.7/83.1
201/246
.586/.569

231/180
77.9%
72.1/89.5
214/265
.499/.491

225/185
82.2%
70.2/92
208/273
.405/.42

228/187
82%
71.1/93
211/276
.352/.364

200/160
80%
1.17
.409/.324

EngineQuest 200 Weingartner Racing Back Cut Alum

N/a

2.02/1.60
4.155
No Pipe

N/A

64/48
75%

131/99
75.6%

186/132
71%
58/65.7
172/195
.669/.60

231/157
68%
72.1/78.1
214/231
.623/.535

252/176
69.8%
78.6/87.5
233/259
.544/.48

259/186
71.8%
80.8/92.5
239/274
.466/.422

259/191
73.7%
80.8/95
239/281
.399/.372

259/194
74.9%
80.8/96.5
239/286
.349/.33

225/162
72%
-
.409/.324

EngineQuest CC220BA 23 Deg Iron

220/-

2.02/1.60
-
No Pipe

71/64
90.1%

141/115
81.6%

196/145
74%
61.2/72.1
181/214
.705/.659

238/170
71.4%
74.3/84.6
220/251
.642/.579

265/189
71.3%
82.7/94
245/279
.572/.515

280/202
72.1%
87.4/100
259/298
.504/.459

284/208
73.2%
88.6/103
263/307
.438/.405

234/172
73.3%
1.29
.409/.324

EngineQuest 220 23 Deg Out of Box Weingartner Racing Iron

220/-

2.02/1.60
4.125
No Pipe

75/49
65.3%

145/103
71%

204/136
66.7%
63.7/67.6
189/200
.734/.618

252/155
61.5%
78.6/77.1
233/228
.68/.528

278/171
61.5%
86.7/85
257/252
.60/.466

292/183
62.7%
91.1/91
270/270
.525/.416

296/191
64.5%
92.4/95
274/281
.456/.372

245/157
64%
1.35
.409/.324

EngineQuest 220 23 Deg Ported Dr Js Performance Out of Box Trmnatr Iron

N/A

2.08/1.60
-
1 3/4" Pipe

N/A

71/63
88.7%

139/125
89.9%

200/159
79.5%
58.9/79.1
174/234
.699/.722

242/190
78.5%
71.2/94.5
211/280
.634/.647

277/214
77.3%
81.5/106
242/315
.581/.583

297/230
77.4%
87.4/114
259/339
.519/.522

307/241
78.5%
90.3/120
268/355
.46/.469

244/193
79.3%
-
.421/.324

EngineQuest CC235BA 23 Deg Iron

235/-

2.08/1.60
-
No Pipe

72/56
77.8%

141/107
75.9%

198/138
69.7%
58.3/68.6
173/203
.692/.627

247/168
68%
72.7/83.6
215/248
.647/.572

279/187
67%
82.1/93
243/276
.585/.51

296/195
65.9%
87.1/97
258/287
.517/.443

304/200
65.8%
89.5/99.5
265/295
.455/.389

244/166
67.9%
1.29
.421/.324

EngineQuest 235 23 Deg Out of Box Weingartner Racing Iron

235/-

2.08/1.60
4.125
No Pipe

70/55
78.6%

139/115
82.7%

199/171
85.9%
58.6/85
174/252
.695/.777

246/190
77.2%
72.4/94.5
215/280
.645/.647

282/199
70.6%
83/99
246/293
.591/.542

308/202
65.6%
90.6/100
269/298
.538/.459

313/204
65.2%
92.1/101
273/301
.469/.397

248/180
72.7%
1.33
.421/.324

EngineQuest 235 23 Deg Out of Box Weingartner Racing Brez I-30 E-30 back Cut Iron

235/-

2.08/1.60
4.155
No Pipe

74/64
86.5%

146/116
79.5%

245/150
61.2%
72.1/74.6
214/221
.856/.681

276/173
62.7%
81.2/86
241/255
.723/.589

295/190
64.4%
86.8/94.5
257/280
.618/.518

305/198
64.9%
89.8/98.5
266/292
.533/.45

310/204
65.8%
91.2/101
270/301
.464/.397

263/172
65.4%
1.32
.421/.324

EngineQuest 23 Deg Dr Js Performance Iron

232/-

2.08/1.60

N/A

71/63
88.7%

139/125
89.9%

200/158
79%
58.9/78.6
174/233
.699/.718

242/190
78.5%
71.2/94.5
211/280
.634/.647

277/214
77.3%
81.5/106
242/315
.581/.583

297/230
77.4%
87.4/114
259/339
.519/.522

307/241
78.5%
90.3/120
268/355
.46/.469

244/193
79.2%
1.32
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

EngineQuest 215 CNC Air Wolf Dr Js Performance Iron

215/-

2.08/1.60
4.06

74/-

143/-

203/-
59.7
177
.709

252/-
74.2
220
.66

291/-
85.6
254
.61

312/-
91.8
272
.545

322/-
94.8
281
.482

328/-
96.5
286
.43

331/-
97.4
289
.385

335/-
98.6
292
.351

280
-
1.56
.421/.324

EngineQuest CH350A Vortec Iron

176/-

1.84/1.50
-
No Pipe

-
-
-
.373/.304

EngineQuest CH350C Vortec Iron

170/-

2.02/1.60
-
No Pipe

54/49
90.7%

104/88
84.6%

194/119
61.3%
60.5/59.2
179/175
.698/.541

224/140
62.5%
69.9/69.6
207/206
.604/.477

224/148
66.1%
69.9/73.6
207/218
.484/.403

226/152
67.3%
70.5/75.6
209/224
.407/.345

228/152
66.7%
71.1/75.6
211/224
.352/.296

200/133
66.6%
1.34
.409/.324

EngineQuest CH350C Vortec Blended VJ Keith Morganstein Iron

N/A

2.02/1.60

N/A

79/56
70.9%

153/94
61.4%

200/149
74.5%
62.4/74.1
185/220
.72/.677

238/177
74.4%
74.3/88
220/261
.642/.603

255/186
72.9%
79.6/92.5
236/274
.55/.507

266/193
72.6%
83/96
246/284
.478/.438

222/160
71.9%
-
.409/.324

EngineQuest CH350I IMCA Iron

167/-

1.94/1.50

N/A

-
-
-
.393/.304

HRD Ported All Pro 23 Deg Alum

N/A

2.125/1.61

N/A

148/120
81.1%

221/165
74.7%
62.3/81
185/240
.756/.745

275/235
85.5%
77.5/115
230/342
.705/.796

312/257
82.4%
88/126
261/374
.64/.696

329/266
80.9%
92.8/131
275/387
.563/.60

344/270
78.5%
97/133
287/393
.504/.522

272/219
80.6%
-
.430/.326

HRD Ported All Pro 227 Alum

N/A

2.15/1.625

N/A

148/115
77.7%

217/191
88%
59.8/92.1
177/273
.733/.854

272/242
89%
74.9/117
222/346
.69/.812

317/260
82%
87.3/125
259/371
.643/.698

342/269
78.7%
94.2/130
279/384
.578/.602

352/273
77.6%
97/132
287/390
.51/.523

358/277
77.4%
98.6/134
292/396
.454/.465

287/232
81.1%
-
.435/.329

HRD Ported AFR 215

245/-

2.125/1.61

N/A

142/111
78.2%

215/162
75.3%
60.6/79.6
180/236
.735/.731

271/222
81.9%
76.4/109
226/323
.695/.752

310/244
78.7%
87.4/120
259/355
.636/.661

328/251
76.5%
92.5/123
274/365
.561/.566

340/254
74.7%
95.9/125
284/370
.498/.491

268/207
77.5%
1.39
.430/.326

HRD Ported Brodix Track I Alum

N/A

2.08/1.60

N/A

138/111
80.4%

198/160
80.8%
58.3/79.6
173/236
.692/.727

254/209
82.3%
74.8/104
221/308
.666/.712

297/218
73.4%
87.4/108
259/321
.623/.594

312/225
72.1%
91.8/112
272/332
.545/.511

320/220
68.8%
94.2/109
279/324
.479/.428

253/191
75.2%
-
.421/.324

HRD Ported GM 580/855 18 Deg

255/-

2.15/1.625

N/A

154/111
72.1%

221/159
71.9%
60.9/76.7
180/227
.747/.711

276/235
85.1%
76/113
225/336
.70/.788

321/251
78.2%
88.4/121
262/359
.651/.674

355/262
73.8%
97.8/126
290/374
.60/.586

364/270
74.2%
100/130
297/386
.527/.517

282/215
76.2%
1.43
.435/.329

HRD Ported GM 855 18 Deg

N/A

2.18/1.60

N/A

149/114
76.5%

225/178
79.1%
60.3/88.5
179/262
.75/.808

277/231
83.4%
74.2/115
220/340
.693/.787

318/260
81.8%
85.2/129
252/383
.636/.709

355/267
75.2%
95.1/133
282/393
.592/.606

365/270
74%
97.8/134
290/398
.521/.526

371/-
99.4
295
.464

294/220
-
-
.441/.324

HRD Ported GM 12480011 SB2.2

N/A

157/111
70.7%

240/160
66.7%
-

297/227
76.4%
-

339/254
74.9%
-

364/264
72.5%
-

374/272
72.7%
-

380/276
72.6%
-

307/223
72.7%

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

HRD Ported GM 12480011 SB2.2

290/-

2.17/1.61

N/A

140/114
81.4%

249/162
65.1%
67.3/79.6
199/236
.834/.731

314/221
70.4%
84.9/109
252/322
.789/.748

355/249
70.1%
96/122
284/362
.713/.674

383/262
68.4%
104/129
307/381
.641/.591

393/270
68.7%
106/133
315/393
.564/.522

406/288
70.9%
110/141
325/419
.51/.487

320/224
69.9%
1.40
.439/.326

HRD Ported GM SB2.2 Hi/Lo

270/-

2.17/1.61

142/114
80.3%

227/165
72.7%
61.4/81
182/240
.76/.745

298/217
72.8%
80.6/107
239/316
.749/.735

350/248
70.9%
94.6/122
280/361
.703/.672

379/267
70.4%
102/131
304/389
.635/.603

392/278
70.9%
106/137
314/405
.563/.538

398/281
70.6%
108/138
319/409
.50/.476

312/224
71.8%
1.47
.439/.326

HRD Ported GM 517 Splayed Val

N/A

2.20/1.625

N/A

142/114
80.3%

225/178
79.1%
59.2/85.8
175/254
.743/.796

294/226
76.9%
77.3/109
229/323
.728/.758

375/257
68.5%
98.6/124
292/367
.743/.69

375/273
72.8%
98.6/132
292/390
.619/.61

395/283
71.6%
104/136
308/404
.559/.542

406/287
70.7%
107/138
316/410
.503/.481

411/290
70.6%
108/140
320/414
.453/.432

328/239
72.7%
-
.446/.329

HRD Ported GM 517 Splayed Val

N/A

2.225/1.625

N/A

135/111
82.2%

220/146
66.4%
56.6/70.4
168/209
.719/.653

294/192
65.3%
75.6/92.6
224/274
.72/.644

353/235
66.6%
90.8/113
269/336
.692/.631

391/265
67.8%
101/128
298/379
.639/.593

409/281
68.7%
105/135
312/401
.573/.539

420/288
68.6%
108/139
320/411
.514/.483

433/292
67.4%
111/141
330/417
.471/.435

332/226
68.2%
-
.451/.329

HRD Ported GM 615x 15 Deg

268/-

2.18/1.61

N/A

151/114
75.5%

218/168
77.1%
58.4/82.5
173/245
.727/.758

270/232
85.9%
72.3/114
214/338
.675/.785

317/257
81.1%
84.9/126
252/374
.634/.696

352/271
77%
94.3/133
279/394
.587/.612

389/280
72%
104/138
309/408
.556/.542

401/283
70.6%
107/139
318/412
.501/.479

410/285
69.5%
110/140
325/415
.456/.429

314/236
75.4%
1.53
.441/.326

HRD Ported GM 615x 15 Deg

285/-

2.20/1.61

N/A

134/121
90.3%

211/178
84.4%
55.5/87.4
164/259
.697/.803

265/229
86.4%
69.7/112
207/333
.657/.775

317/259
81.7%
83.4/127
247/377
.628/.701

357/272
76.2%
93.9/134
278/396
.59/.614

390/278
71.3%
103/137
304/405
.552/.538

410/282
68.8%
108/139
320/410
.508/.477

422/288
68.2%
111/141
329/419
.465/.433

313/238
76.1%
1.48
.446/.326

HRD Ported GM 615x 15 Deg Rolled to 13 Deg

260/-

2.17/1.60

125/109
87.2%

199/175
87.9%
53.8/87
159/258
.666/.795

257/228
88.7%
69.5/113
206/336
.646/.777

312/262
84%
84.4/130
250/386
.627/.714

355/275
77.5%
96/137
284/405
.594/.625

384/284
74%
104/141
308/419
.551/.553

408/290
71.1%
110/144
327/427
.512/.494

419/296
70.6%
113/147
336/436
.468/.448

307/240
78%
1.61
.439/.324

Holley 300-570 Alum

172/-

2.02/1.60
-
Pipe

72/53
73.6%

134/102
76.1%

188/143
76.1%
58.7/71.1
174/211
.676/.65

223/170
76.2%
69.6/84.6
206/251
.602/.579

232/177
76.3%
72.4/88
214/261
.501/.482

236/180
76.3%
73.6/89.5
218/265
.425/.409

203/154
76.2%
1.37
.409/.324

Holley SysteMax Alum

186/-

2.02/1.60
-
Pipe

66/53
80.3%

130/92
70.8%

184/122
66.3%
57.4/60.7
170/180
.662/.554

222/148
66.7%
69.3/73.6
205/218
.599/.504

242/172
71.1%
75.5/85.5
224/253
.522/.469

252/187
74.2%
78.6/93
233/276
.453/.425

206/144
70%
1.35
.409/.324

Holley Avenger Alum

184/68

2.02/1.60

223/173
77.6%
69.6/86
206/255
.481/.471

-
-
1.21/2.54
.409/.324

Patriot 23 Deg 185 Out of Box CHW SF600 Alum

185/-

2.02/1.60
4.00
No Pipe

N/A

56/53
94.6%

101/83
82.2%

147/114
77.6%
45.9/56.7
136/168
.529/.518

190/137
72.1%
59.3/68.1
176/202
.513/.467

227/155
68.3%
70.8/77.1
210/228
.49/.422

245/171
69.8%
76.4/85
227/252
.441/.388

248/177
71.4%
77.4/88
229/261
.382/.345

193/140
72.3%
1.34
.409/.324

Patriot 23 Deg 190 CNC Alum

190/62

2.02/1.60

64/50
78.1%

130/96
73.8%

181/136
75.1%
56.5/67.6
167/200
.651/.618

219/165
75.3%
68.3/82.1
202/243
.591/.562

248/181
73%
77.4/90
229/267
.535/.493

260/190
73.1%
81.1/94.5
240/280
.468/.431

208/154
74%
1.37/3.06
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Patriot 23 Deg 195 CNC Alum

195/-

2.02/1.60

70/68
97.1%

140/106
75.7%

193/144
74.6%
60.2/71.6
178/212
.694/.654

230/178
77.4%
71.8/88.5
213/262
.621/.606

259/190
73.4%
80.8/94.5
239/280
.559/.518

270/201
74.4%
84.3/100
250/296
.486/.456

273/211
77.3%
85.2/105
252/311
.421/.411

228/172
75.5%
1.40
.409/.324

Patriot 23 Deg 195 Dr Js Performance Alum

195/-

2.05/1.60
-
Pipe

N/A

70/52
74.3%

132/94
71.2%

180/127
70.6%
54.5/63.2
162/187
.638/.577

220/162
73.6%
66.7/80.6
197/239
.585/.552

244/178
73%
73.9/88.5
219/262
.519/.485

260/188
72.3%
78.8/93.5
233/277
.461/.427

260/192
73.8%
78.8/95.5
233/283
.395/.374

216/157
72.6%
1.33
.415/.324

Patriot 23 Deg 215 CNC Alum

215/-

2.02/1.60

71/68
95.8%

141/106
75.2%

196/144
73.5%
61.2/71.6
181/212
.705/.654

234/178
76.1%
73/88.5
216/262
.631/.606

260/190
73.1%
81.1/94.5
240/280
.561/.518

278/201
72.3%
86.7/100
257/296
.50/.456

282/211
74.8%
88/105
261/311
.435/.411

232/172
74%
1.31
.409/.324

Patriot 23 Deg 215 CNC Alum

215/-

2.08/1.60

72/68
94.4%

138/106
76.8%

191/144
75.4%
56.2/71.6
167/212
.667/.654

230/178
77.4%
67.7/88.5
201/262
.603/.606

261/190
72.8%
76.8/94.5
228/280
.547/.518

283/201
71%
83.3/100
247/296
.494/.456

290/211
72.8%
85.3/105
253/311
.434/.411

232/172
73.9%
1.35
.421/.324

Patriot 23 Deg 225 Out of Box CHW SF600 Alum

225/-

2.08/1.60
4.00
No Pipe

N/A

64/48
75%

127/93
73.2%

181/135
74.6%
53.3/67.1
158/199
.632/.613

229/156
68.1%
67.4/77.6
200/230
.60/.531

266/167
62.8%
78.3/83.1
232/246
.558/.455

278/170
61.2%
81.8/84.6
242/251
.486/.386

283/174
61.5%
83.3/86.5
247/256
.424/.339

227/149
65.6%
1.26
.421/.324

Patriot Freedom 190 CNC HPS Alum

190/62

2.02/1.60

68/50
73.5%

132/97
73.5%

187/137
73.3%
58.4/68.1
173/202
.673/.622

225/165
73.3%
70.2/82.1
208/243
.607/.562

250/181
72.4%
78/90
231/267
.54/.493

259/190
73.4%
80.8/94.5
239/280
.466/.431

211/154
73.1%
1.36/3.06
.409/.324

Patriot Freedom 225 Alum

225/70

2.08/1.60

82/70
85.4%

158/119
75.3%

222/164
73.9%
65.3/81.6
194/242
.776/.745

259/194
74.9%
76.2/96.5
226/286
.679/.661

287/215
74.9%
84.5/107
250/317
.602/.586

295/222
75.3%
86.8/110
257/327
.515/.504

301/224
74.4%
88.6/111
262/330
.451/.436

254/190
74.8%
1.34/3.20
.421/.324

Patriot Freedom Meaux Racing Out of Box SF600 Alum

225/-

2.08/1.60
4.03
No Pipe

N/A

127/102
80.3%

187/149
79.7%
55/74.1
163/220
.653/.677

234/174
74.4%
68.9/86.5
204/256
.613/.593

262/179
68.3%
77.1/89
228/264
.549/.488

275/181
65.8%
80.9/90
240/267
.48/.411

277/182
65.7%
81.5/90.5
242/268
.415/.354

276/181
65.6%
81.2/90
241/267
.362/.308

234/164
70.1%
1.23
.421/.324

PBM 217 CNC Iron

217/-

2.05/1.60

146/114
78.1%

206/161
78.2%
62.4/80.1
185/237
.73/.731

255/191
74.9%
77.3/95
229/281
.678/.651

288/209
72.6%
87.3/104
259/308
.613/.57

304/216
71.1%
92.1/107
273/318
.539/.491

309/220
71.2%
93.6/109
277/324
.469/.428

251/185
73.7%
1.42
.415/.324

PBM 228 CNC Iron

228/-

2.08/1.60

143/111
77.6%

209/160
76.6%
61.5/79.6
182/236
.73/.727

258/192
74.4%
75.9/95.5
225/283
.676/.654

294/212
72.1%
86.5/105
256/312
.616/.578

314/220
70.1%
92.4/109
274/324
.549/.50

321/225
70.1%
94.5/112
280/332
.481/.438

257/187
72.8%
1.41
.421/.324

PBM 232 CNC Iron

232/-

2.10/1.60

151/114
75.5%

211/164
77.7%
60.9/81.6
181/242
.73/.745

261/196
75.1%
75.4/97.5
223/289
.677/.668

298/216
72.5%
86/107
255/318
.619/.589

316/230
72.8%
91.2/114
270/339
.547/.522

325/237
72.9%
93.8/118
278/349
.482/.461

260/193
74.1%
1.40
.425/.324

PBM 15 Deg CNC Alum

N/A

2.18/1.625

153/110
71.9%

228/184
80.7%
61.1/88.7
181/263
.76/.823

300/229
76.3%
80.4/110
238/327
.75/.768

340/258
75.9%
91.1/124
270/369
.68/.692

371/268
72.2%
99.4/129
295/383
.618/.599

382/274
71.7%
102/132
303/391
.546/.525

296/221
74.6%
-
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Pro Comp 23 Deg Alum

N/A

2.02/1.60

71/57
80.3%

146/101
69.2%

204/157
77%
63.7/78.1
189/231
.734/.713

250/177
70.8%
78/88
231/261
.675/.603

261/186
71.3%
81.4/92.5
241/274
.563/.507

267/190
71.2%
83.3/94.5
247/280
.48/.431

276/195
70.7%
86.1/97
255/287
.426/.38

234/168
71.7%
-
.409/.324

Pro Comp 190 OLD Out of BoxWeingartner Racing Alum

190/-

2.02/1.60
4.125
No Pipe

N/A

71/55
77.5%

130/110
84.6%

174/143
82.2%
54.3/71.1
161/211
.626/.65

217/157
72.4%
67.7/78.1
201/231
.586/.535

247/159
64.4%
77.1/79.1
228/234
.533/.433

250/157
62.8%
78/78.1
231/231
.45/.357

250/156
62.4%
78/77.6
231/230
.385/.304

211/147
69.6%
1.32
.409/.324

Pro Comp 190 Out of Box Weingartner Racing Alum

190/-

2.02/1.60
4.125
No Pipe

N/A

71/55
77.5%

127/104
81.9%

178/132
74.2%
55.5/65.7
165/195
.64/.60

222/165
74.3%
69.3/82.1
205/243
.599/.562

253/180
71.1%
78.9/89.5
234/265
.546/.491

279/181
64.9%
87.1/90
258/267
.502/.411

287/182
63.4%
89.6/90.5
265/268
.443/.354

224/157
70.1%
1.51
.409/.324

Pro Comp 190 23 Deg Dr Js Performance Alum

190/-

2.02/1.60

N/A

60/52
86.7%

107/81
75.7%

152/109
71.7%
47.4/54.2
141/161
.547/.495

200/136
68%
62.4/67.6
185/200
.54/.463

238/156
65.5%
74.3/77.6
220/230
.514/.425

257/174
67.7%
80.2/86.5
238/256
.462/.395

260/177
68.1%
81.1/88
240/261
.401/.345

202/139
68.6%
1.37
.409/.324

Pro Comp 190 23 Deg CNC Dr Js Performance Alum

N/A

2.08/1.60
-
1 3/4" Pipe

N/A

73/65
89%

139/115
82.7%

201/138
68.7%
59.2/68.6
175/203
.702/.627

245/167
68.2%
72.1/83.1
214/246
.642/.569

272/198
72.8%
80/98.5
237/292
.57/.54

289/217
75.1%
85.1/108
252/320
.505/.493

297/231
77.8%
87.4/115
259/340
.445/.45

241/178
73.9%
-
.421/.324

Pro Comp 220 23 Deg CNC Dr Js Performance Alum

220/-

2.08/1.60

75/69
92%

144/110
76.4%

201/145
72.1%
59.2/72.1
175/214
.702/.659

244/175
71.7%
71.8/87
213/258
.639/.596

285/200
70.2%
83.9/99.5
249/295
.597/.545

308/215
69.8%
90.6/107
269/317
.538/.488

314/228
72.6%
92.4/113
274/336
.47/.444

318/237
74.5%
93.6/118
277/349
.417/.404

325/241
74.2%
95.6/120
283/355
.379/.365

267/194
72.5%
1.48
.421/.324

Pro Comp 23 Deg 210 CNC Alum

210/-

2.02/1.60
4.125

N/A

77/56
72.7%

157/112
71.3%

212/156
73.6%
66.2/77.6
196/230
.763/.709

240/183
76.3%
74.9/91
222/270
.648/.623

264/199
75.4%
82.4/99
244/293
.57/.542

278/208
74.8%
86.7/103
257/307
.50/.472

287/213
74.2%
89.6/106
265/314
.443/.415

240/179
74.5%
1.37
.409/.324

Pro Comp 23 Deg 210 PC3003 SF600 Alum

210/-

2.02/1.60
-
Pipe

N/A

63/52
82.5%

117/98
83.8%

163/132
81%
50.9/65.7
151/195
.586/.60

204/162
79.4%
63.7/80.6
189/239
.55/.552

230/180
78.3%
71.8/89.5
213/265
.496/.491

248/189
76.2%
77.4/94
229/279
.446/.429

252/192
76.2%
78.6/95.5
233/283
.389/.374

202/159
78.5%
1.20
.409/.324

Pro Comp 210 CNC Out of Box Weingartner Racing Alum

210/-

2.02/1.60
4.125
No Pipe

N/A

77/56
72.7%

157/112
71.3%

212/156
73.6%
66.2/77.6
196/230
.763/.709

240/183
76.3%
74.9/91
222/270
.648/.623

264/199
75.4%
82.4/99
244/293
.57/.542

278/208
74.8%
86.7/103
257/307
.50/.472

287/213
74.2%
89.6/106
265/314
.443/.415

290/216
74.5%
90.5/107
268/318
.391/.368

247/184
74.5%
1.38
.409/.324

Pro Comp 210 CNC Out of Box Weingartner Racing Brez Alum

210/-

2.02/1.60
4.155
No Pipe

N/A

62/49
79%

113/105
92.9%

160/136
85%
49.9/67.6
148/200
.576/.618

207/172
83.1%
64.6/85.5
191/253
.559/.586

250/187
74.8%
78/93
231/276
.54/.51

277/189
68.2%
86.4/94
256/279
.498/.429

284/189
66.5%
88.6/94
263/279
.438/.368

215/163
75.8%
1.35
.409/.324

Pro Comp Vortec

N/A

2.02/1.60

N/A

64/57
89.1%

114/101
88.6%

161/128
79.5%
50.2/63.7
149/189
.579/.581

201/152
75.6%
62.7/75.6
186/224
.542/.518

232/159
68.5%
72.4/79.1
214/234
.501/.433

251/169
67.3%
78.3/84.1
232/249
.452/.384

192/142
73.9%
-
.409/.324

Pro Comp Ported Chad Speier v2.5 I-45 E-45 Alum

N/A

2.05/1.60
4.06
Pipe

N/A

149/107
71.8%

194/142
73.2%
58.8/70.6
174/209
.688/.645

245/175
71.4%
74.2/87
220/258
.651/.596

284/196
69%
86/97.5
255/289
.604/.534

300/209
69.7%
90.9/104
269/308
.532/.475

305/219
71.8%
92.4/109
274/323
.463/.426

308/225
73.1%
93.3/112
276/332
.409/.383

312/230
73.7%
94.5/114
280/339
.369/.348

313/233
74.4%
94.8/116
281/343
.333/.317

268/193
72%
-
.415/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Pro-Filer 195 Alum

195/-

2.02/1.60

N/A

145/101
69.7%

205/144
70.2%
64/71.6
190/212
.738/.654

255/175
68.6%
79.6/87
236/258
.688/.596

278/194
69.8%
86.7/96.5
257/286
.60/.529

281/205
73%
87.7/102
260/302
.505/.466

282/213
75.5%
88/106
261/314
.435/.415

283/219
77.4%
88.3/109
262/323
.382/.373

247/179
72.4%
1.45
.409/.324

Pro-Filer 195 Darin Morgan SF600 Alum

195/-

2.02/-

N/A

147/-

214/-
66.8
198
.77

259/-
80.8
239
.699

275/-
85.8
254
.594

276/-
86.1
255
.496

277/-
86.4
256
.427

277/-
86.4
256
.374

246
-
1.42
.409

Pro-Filer 195 Out of Box Chad Speier Alum

195/-

2.02/-

N/A

156/-

217/-
67.7
201
.781

263/-
82.1
243
.71

277/-
86.4
256
.598

282/-
88
261
.507

285/-
88.9
263
.439

285/-
88.9
263
.385

252
-
1.46
.409

Pro-Filer 195 Ported Chad Speier Alum

204.5/-

2.055/-

N/A

164/-

218/-
65.7
195
.771

272/-
82
243
.721

304/-
91.7
272
.645

305/-
92
272
.539

307/-
92.6
274
.465

308/-
92.9
275
.408

268
-
-
.416

Pro-Filer 195 Ported Chad Speier I-45 E-45 Alum

227/-

2.10/1.60
4.155

145/-

212/-
61.2
181
.734

268/-
77.4
229
.696

302/-
87.2
258
.627

322/-
93
275
.557

331/-
95.6
283
.491

333/-
96.1
285
.432

334/-
96.4
286
.385

336/-
97
287
.349

287
-
1.48
.425/.324

Pro-Filer 195 Ported Chad Speier I-45 E-45 Alum

227/-

2.10/1.60
4.155
1 7/8" Pipe

N/A

153/112
73.2%

222/154
69.4%
64.1/76.6
190/227
.768/.699

266/185
69.5%
76.8/92
228/273
.69/.63

299/207
69.2%
86.3/103
256/305
.621/.564

319/219
68.7%
92.1/109
273/323
.552/.497

329/227
69%
95/113
281/335
.488/.442

332/236
71.1%
95.9/117
284/348
.431/.402

334/239
71.6%
96.4/119
286/352
.385/.362

336/241
71.7%
97/120
287/355
.349/.328

288/202
70.3%
1.48
.425/.324

Pro-Filer 176-21 C 23 Deg Alum

210/-

2.055/1.60

129/109
84.5%

186/145
78%
56.1/72.1
166/214
.658/.659

227/172
75.8%
68.4/85.5
203/253
.602/.586

271/187
69%
81.7/93
242/276
.575/.51

284/219
77.1%
85.6/109
254/323
.502/.497

294/232
78.9%
88.6/115
263/342
.446/.452

232/177
76.5%
1.40
.416/.324

Pro-Filer 23 Deg Darin Morgan Ports Out of Box Int 30 deg Back cut 18 deg tulip exhaust w back cut SF600 Alum

210/-

2.055/1.60
-
No Pipe

62.15-62.2

143/96
67.1%

204/150
73.5%
61.5/74.6
182/221
.721/.681

250/178
71.2%
75.4/88.5
223/262
.663/.606

284/199
70.1%
85.6/99
254/293
.603/.542

300/211
70.3%
90.4/105
268/311
.53/.479

300/218
72.7%
90.4/108
268/321
.455/.424

302/221
73.2%
91.1/110
270/326
.40/.376

302/223
73.8%
91.1/111
270/329
.356/.338

300/223
74.3%
90.4/111
268/329
.318/.304

265/191
72.1%
1.44
.416/.324

Pro-Filer 23 Deg Gasket Matched Trmnatr Alum

N/A

2.055/1.60
4.07

N/A

143/96
67.1%

204/150
73.5%
61.5/74.6
182/221
.721/.681

250/178
71.2%
75.4/88.5
223/262
.663/.606

284/199
70.1%
85.6/99
254/293
.603/.542

300/211
70.3%
90.4/105
268/311
.53/.479

300/218
72.7%
90.4/108
268/321
.455/.424

302/221
73.2%
91.1/110
270/326
.40/.376

302/223
73.8%
91.1/111
270/329
.356/.338

300/223
74.3%
90.4/111
268/329
.318/.304

265/191
72.1%
-
.416/.324

Pro-Filer 23 Deg VJ Gasket Matched Ports Dr Js Perfomance Alum

210/-

2.08/1.60
4.155
1 3/4" Pipe

N/A

74/59
79.7%

135/112
83%

197/162
82.2%
58/80.6
172/239
.688/.736

243/189
77.8%
71.5/94
212/279
.637/.644

282/205
72.7%
83/102
246/302
.591/.559

290/212
73.1%
85.3/105
253/312
.507/.481

295/221
74.9%
86.8/110
257/326
.442/.43

299/228
76.3%
88/113
261/336
.392/.388

249/190
76.3%
1.42
.421/.324

Pro-Filer 210 Out of Box Daryl Alum

210/-

2.055/1.60

N/A

127/102
80.3%

183/138
75.4%
55.2/68.6
163/203
.647/.627

232/158
68.1%
69.9/78.6
207/233
.615/.538

261/171
65.5%
78.7/85
233/252
.554/.466

277/177
63.9%
83.5/88
247/261
.49/.402

281/182
64.8%
84.7/90.5
251/268
.426/.354

295/-
88.9
264
.391

237/155
-
1.40
.416/.324

Pro-Filer 210 Out of Box Back Cut Valve Chad Speier Alum

210/-

2.055/-
4.125

N/A

159/-

211/-
63.6
188
.746

261/-
78.7
233
.692

285/-
85.9
255
.605

290/-
87.4
259
.513

295/-
88.9
264
.447

295/-
88.9
264
.391

257
-
1.40
.416

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Pro-Filer 210 Pushing the Throat Back Cut Valve Chad Speier Alum

210/-

2.055/-
4.125

N/A

155/-

212/-
63.9
189
.75

260/-
78.4
232
.69

290/-
87.4
259
.615

291/-
87.7
260
.515

297/-
89.5
265
.45

300/-
90.4
268
.398

258
-
1.43
.416

Pro-Filer 210 VJ Clean Up Chad Speier Alum

210/-

2.125/-

N/A

148/-

217/-
61.2
181
.742

261/-
73.6
218
.669

300/-
84.6
251
.616

302/-
85.2
252
.516

303/-
85.4
253
.444

300/-
84.6
251
.385

262
-
1.44
.430

Pro-Filer Ported Chad Speier Alum

218/-

2.10/-

N/A

153/-

217/-
62.7
186
.751

266/-
76.8
228
.69

300/-
86.6
257
.623

311/-
89.8
266
.538

315/-
90.9
269
.467

319/-
92.1
273
.414

269
-
1.46
.425

Pro-Filer Ported Chad Speier v2.72 Alum

N/A

2.10/1.60
4.155
No Pipe

N/A

139/100
71.9%

196/129
65.8%
56.6/64.2
168/190
.678/.586

243/161
66.3%
70.2/80.1
208/237
.631/.548

283/188
66.4%
81.7/93.5
242/277
.588/.512

317/206
65%
91.5/102
271/304
.549/.468

331/219
66.2%
95.6/109
283/323
.491/.426

337/228
67.7%
97.3/113
288/336
.437/.388

341/233
68.3%
98.5/116
292/343
.393/.353

344/239
69.5%
99.3/119
294/352
.357/.326

281/189
67.3%
-
.425/.324

Pro-Filer 220 CNC Air Wolf Alum

220/-

2.08/1.60
-
1 7/8" Pipe

78/65
83.3%

155/116
74.8%

228/162
71.1%
67.1/80.6
199/239
.797/.736

276/196
71%
81.2/97.5
241/289
.723/.668

301/219
72.8%
88.6/109
262/323
.631/.597

315/233
74%
92.7/116
275/343
.55/.529

320/244
76.3%
94.2/121
279/360
.479/.475

322/252
78.3%
94.8/125
281/371
.422/.429

324/257
79.3%
95.4/128
283/379
.377/.389

-/260

280/210
74.9%
1.47
.421/.324

Pro-Filer Darin Morgan 220 CNC Air Wolf SF600 Alum

220/-

2.08/-

N/A

155/-

225/-
66.2
196
.786

272/-
80
237
.713

304/-
89.5
265
.637

317/-
93.3
276
.554

321/-
94.5
280
.481

326/-
95.9
284
.427

330/-
97.1
288
.384

331/-
97.4
289
.347

287
-
1.50
.421

Pro-Filer 235 CNC Air Wolf Alum

235/-

2.10/1.60
-
1 7/8" Pipe

N/A

75/69
92%

147/110
74.8%

203/145
71.4%
58.6/72.1
174/214
.703/.659

249/180
72.3%
71.9/89.5
213/265
.646/.613

288/207
71.9%
83.2/103
246/305
.598/.564

310/220
71%
89.5/109
265/324
.536/.50

325/229
70.5%
93.8/114
278/337
.482/.446

335/238
71%
96.7/118
287/351
.435/.405

338/247
73.1%
97.6/123
289/364
.39/.374

339/250
73.7%
97.9/124
290/368
.352/.341

282/203
72.1%
1.44
.425/.324

Pro-Filer Darin Morgan 245 CNC Air Wolf SF600 Alum

245/-

2.125/-

N/A

161/-

231/-
65.1
193
.79

281/-
79.2
235
.721

311/-
87.7
260
.638

329/-
92.8
275
.563

339/-
95.6
283
.497

345/-
97.3
288
.442

349/-
98.4
292
.398

350/-
98.7
292
.359

300
-
1.43
.430

Pro-Filer Meaux Racing 220 CNC Air Wolf SF600 Alum

220/-

2.10/1.60
4.125
No Pipe

N/A

142/102
71.8%

209/146
69.9%
60.3/72.6
179/215
.723/.663

257/174
67.7%
74.2/86.5
220/256
.667/.593

290/196
67.6%
83.7/97.5
248/289
.602/.534

299/211
70.6%
86.3/105
256/311
.517/.479

303/220
72.6%
87.5/109
259/324
.449/.428

307/224
73%
88.6/111
263/330
.398/.382

309/227
73.5%
89.2/113
264/335
.356/.344

265/188
70.9%
1.40
.425/.324

Pro-Filer 13 Clean up Chad Speier Alum

N/A

2.18/1.58

N/A

148/115
77.7%

221/166
75.1%
59.2/84.7
175/251
.737/.764

279/202
72.4%
74.7/103
221/305
.698/.697

328/229
69.8%
87.9/117
260/346
.656/.632

351/244
69.5%
94/124
279/369
.585/.561

365/252
69%
97.8/129
290/381
.521/.497

370/257
69.5%
99.1/131
294/388
.463/.443

373/260
69.7%
99.9/133
296/393
.414/.399

375/262
69.9%
100/134
298/396
.375/.362

312/221
70.7%
-
.441/.320

Pro-Filer Ported Chad Speier Alum

N/A

2.20/-

N/A

152/-

229/-
60.2
178
.756

290/-
76.3
226
.718

335/-
88.1
261
.664

369/-
97.1
288
.609

388/-
102
302
.549

395/-
104
308
.489

397/-
104
309
.437

399/-
105
311
.395

328
-
-
.446

Pro 14 Deg as Cast

235/-

2.125/1.625

N/A

72/64
88.9%

147/105
71.4%

212/156
73.6%
59.8/75.2
177/223
.725/.698

269/200
74.3%
75.8/96.4
225/286
.69/.671

293/226
77.1%
82.6/109
245/323
.601/.606

312/238
76.3%
88/115
261/340
.534/.532

325/245
75.4%
91.6/118
272/350
.476/.47

260/195
75.1%
1.38
.430/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Pro 14 Deg CNC Ported

305/-

2.25/1.625

N/A

77/67
87%

162/119
73.5%

234/189
80.8%
58.9/91.1
174/270
.756/.845

300/229
76.3%
75.5/110
224/327
.727/.768

353/252
71.4%
88.8/122
263/360
.684/.676

384/266
69.3%
96.6/128
286/380
.62/.595

401/274
68.3%
101/132
299/391
.555/.525

411/281
68.4%
103/135
306/401
.498/.471

321/230
71.7%
1.35
.456/.329

Pro 23 Deg as Cast Alum

235/-

2.055/1.60
4.03
No Pipe

64/72

129/109
84.5%

186/145
78%
56.1/72.1
166/214
.658/.659

227/172
75.8%
68.4/85.5
203/253
.602/.586

271/187
69%
81.7/93
242/276
.575/.51

284/219
77.1%
85.6/109
254/323
.502/.497

295/232
78.6%
88.9/115
264/342
.447/.452

232/177
76.4%
1.26
.416/.324

Pro 23 Deg as Cast Alum

N/A

2.055/1.60
4.03
No Pipe

64/72

66/56
84.8%

134/110
82.1%

191/147
77%
57.6/73.1
171/217
.675/.668

232/175
75.4%
69.9/87
207/258
.615/.596

260/192
73.8%
78.4/95.5
232/283
.552/.523

278/201
72.3%
83.8/100
248/296
.492/.456

291/207
71.1%
87.7/103
260/305
.441/.403

296/210
70.9%
89.2/104
264/309
.393/.358

240/177
73.8%
-
.416/.324

Pro 23 Deg as Cast Alum

235/-

2.08/1.60
4.03
No Pipe

64/72

73/60
82.2%

138/114
82.6%

196/152
77.6%
57.7/75.6
171/224
.685/.69

243/178
73.3%
71.5/88.5
212/262
.637/.606

274/192
70.1%
80.6/95.5
239/283
.574/.523

292/194
66.4%
85.9/96.5
255/286
.51/.441

312/197
63.1%
91.8/98
272/290
.467/.383

243/171
70.6%
1.33
.421/.324

Pro Topline 220 Out of Box

220/-

2.02/1.60
-
No Pipe

N/A

126/89
70.6%

184/123
66.8%
57.4/61.2
170/181
.662/.559

233/147
63.1%
72.7/73.1
215/217
.629/.501

265/162
61.1%
82.7/80.6
245/239
.572/.441

287/171
59.6%
89.6/85
265/252
.516/.388

219/138
63.2%
1.30
.409/.324

Pro Topline Iron

254/-

2.15/-

N/A

154/117
76%

223/165
74%
61.4
182
.754

282/216
76.6%
77.7
230
.715

327/240
73.4%
90.1
267
.663

351/250
71.2%
96.7
286
.593

364/260
71.4%
100
297
.527

284/208
73.4%
1.43
.435

Pro Topline Ported Rons Alum

N/A

2.10/1.60
4.125

N/A

131/115
87.8%

184/152
82.6%
53.1/75.6
157/224
.637/.69

229/180
78.6%
66.1/89.5
196/265
.594/.613

263/198
75.3%
75.9/98.5
225/292
.546/.54

291/209
71.8%
84/104
249/308
.504/.475

303/212
70%
87.5/105
259/312
.449/.413

305/214
70.2%
88.1/106
261/315
.396/.365

244/183
75%
-
.425/.324

Pro Topline 14 Ported Weingartner Racing Alum

N/A

-
-
No Pipe

N/A

76/51
67.1%

158/101
63.9%

229/140
61.1%
-

294/177
60.2%
-

383/211
55.1%
-

380/245
64.5%
-

395/258
65.3%
-

401/268
66.8%
-

407/272
66.8%
-

415/277
66.7%
-

340/217
63.7%

Racer Pro 23 Deg Ported Bullet Cylinder Heads

N/A

2.08/1.60

71/63
88.7%

140/109
77.9%

198/155
78.3%
58.3/77.1
173/228
.692/.704

248/187
75.4%
73/93
216/276
.65/.637

278/210
75.5%
81.8/104
242/309
.583/.572

293/221
75.4%
86.2/110
255/326
.512/.502

305/229
75.1%
89.8/114
266/337
.457/.446

244/185
76%
-
.421/.324

Racer Pro 18 Deg Ported Bullet Cylinder Heads

247/100

2.15/1.60

76/60
78.9%

158/112
70.9%

224/155
69.2%
61.7/77.1
183/228
.757/.704

273/194
71.1%
75.2/96.5
223/286
.692/.661

312/233
74.7%
85.9/116
255/343
.633/.635

331/241
72.8%
91.2/120
270/355
.559/.547

340/250
73.5%
93.7/124
277/368
.493/.487

344/257
74.7%
94.8/128
281/379
.436/.438

283/206
72.8%
1.39/2.57
.435/.324

RDP-SBX Australian Pro Stock Darin Morgan SF600 Alum

N/A

2.27/1.60
-
No Pipe

N/A

146/92
63%

231/151
65.4%
57.1/75.1
169/223
.74/.686

314/188
59.9%
77.6/93.5
230/277
.754/.64

384/238
62%
94.9/118
281/351
.738/.649

426/271
63.6%
105/135
312/399
.682/.615

450/286
63.6%
111/142
329/421
.617/.557

465/296
63.7%
115/147
340/436
.558/.504

473/297
62.8%
117/148
346/438
.505/.45

482/299
62%
119/149
353/441
.463/.407

375/235
62.8%
-
.460/.324

RFD Monster 18 Deg Alum

N/A

2.18/1.625

N/A

239/189
79.1%
64/91.1
190/270
.797/.845

304/233
76.6%
81.4/112
241/333
.76/.782

345/266
77.1%
92.4/128
274/380
.69/.714

380/266
70%
102/128
302/380
.633/.595

394/276
70.1%
106/133
313/394
.563/.529

395/281
71.1%
106/135
314/401
.494/.471

343/252
73.5%
-
.441/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

RHS RR 21 Deg Weingartner Racing Out of Box

N/A

2.08/1.60
4.155
No Pipe

N/A

67/55
82.1%

151/113
74.8%

212/154
72.6%
62.4/76.6
185/227
.741/.699

255/187
73.3%
75/93
222/276
.668/.637

271/202
74.5%
79.8/100
236/298
.568/.551

282/206
73%
83/102
246/304
.493/.468

287/210
73.2%
84.5/104
250/309
.43/.409

296/213
72%
87.1/106
258/314
.388/.363

251/184
73.3%
-
.421/.324

RHS 21 Deg Ported Weingartner Racing

N/A

2.125/1.60
-
No Pipe

N/A

70/55
78.6%

141/96
68.1%

208/133
63.9%
58.6/66.1
174/196
.711/.604

260/164
63.1%
73.3/81.6
217/242
.667/.559

298/192
64.4%
84/95.5
249/283
.611/.523

333/212
63.7%
93.9/105
278/312
.569/.481

343/224
65.3%
96.7/111
287/330
.503/.436

346/232
67.1%
97.6/115
289/342
.444/.395

350/236
67.4%
98.7/117
292/348
.399/.357

360/241
66.9%
102/120
301/355
.369/.328

293/192
65.6%
-
.430/.324

RHS 21 Deg Ported Rons Porting Service

250/-

2.15/1.60

152/125
82.2%

220/170
77.3%
60.6/84.6
180/251
.744/.772

275/207
75.3%
75.7/103
224/305
.697/.705

318/220
69.2%
87.6/109
260/324
.645/.60

340/234
68.8%
93.7/116
277/345
.575/.531

346/242
69.9%
95.3/120
282/357
.501/.471

352/252
71.6%
97/125
287/371
.446/.429

286/207
72.4%
1.41
.435/.324

RHS Lightning Iron CHP

200/75

2.06/1.60

65/45
69.2%

122/91
74.6%

170/128
75.3%
51/63.7
151/189
.60/.581

210/152
72.4%
63/75.6
187/224
.556/.518

233/167
71.7%
69.9/83.1
207/246
.493/.455

263/176
66.9%
78.9/87.5
234/259
.464/.40

200/143
71.5%
1.32/2.35
.417/.324

RHS Lightning 23 Deg Ported Bullet Cylinder Heads Iron

218/91

2.05/1.60

72/57
79.2%

140/103
73.6%

183/144
78.7%
55.4/71.6
164/212
.649/.654

228/179
78.5%
69.1/89
205/264
.606/.61

265/202
76.2%
80.3/100
238/298
.564/.551

288/215
74.7%
87.3/107
259/317
.51/.488

294/220
74.8%
89.1/109
264/324
.447/.428

233/177
76%
1.35/2.42
.415/.324

RHS Pro Action 23 Deg 180 SF600

180/-

2.02/1.60
4.20

64/72

74/58
78.4%

151/101
66.9%

207/157
75.8%
64.6/78.1
191/231
.745/.713

243/177
72.8%
75.8/88
225/261
.656/.603

258/186
72.1%
80.5/92.5
239/274
.557/.507

263/190
72.2%
82.1/94.5
243/280
.473/.431

270/195
72.2%
84.3/97
250/287
.416/.38

232/168
72.3%
1.50
.409/.324

RHS Pro Action 23 Deg 200 SF600

200/-

2.02/1.60
4.20

50/64/72

69/57
82.6%

134/101
75.4%

192/157
81.8%
59.9/78.1
178/231
.691/.713

236/177
75%
73.6/88
218/261
.637/.603

261/186
71.3%
81.4/92.5
241/274
.563/.507

268/190
70.9%
83.6/94.5
248/280
.482/.431

278/195
70.1%
86.7/97
257/287
.429/.38

228/168
73.5%
1.39
.409/.324

RHS Pro Action 23 Deg 220 SF600

220/-

2.02/1.60
4.20

50/64/72

71/57
80.3%

146/101
69.2%

205/157
76.6%
64/78.1
190/231
.738/.713

250/177
70.8%
78/88
231/261
.675/.603

265/186
70.2%
82.7/92.5
245/274
.572/.507

272/190
69.9%
84.9/94.5
251/280
.489/.431

282/195
69.1%
88/97
261/287
.435/.38

237/168
70.8%
1.28
.409/.324

RHS Pro Action 23 Deg 220 Joe Sherman SF600 Iron

220/-

2.02/1.60

N/A

68/55
80.9%

128/99
77.3%

182/132
72.5%
56.8/65.7
168/195
.655/.60

233/160
68.7%
72.7/79.6
215/236
.629/.545

269/184
68.4%
83.9/91.5
249/271
.581/.501

290/192
66.2%
90.5/95.5
268/283
.522/.436

301/201
66.8%
93.9/100
278/296
.464/.391

234/161
69%
1.37
.409/.324

RHS 220 Smithberger Racing Iron

N/A

2.02/1.60
4.155
No Pipe

N/A

73/53
72.6%

131/115
87.8%

190/147
77.4%
59.3/73.1
176/217
.684/.668

241/180
74.7%
75.2/89.5
223/265
.65/.613

279/196
70.3%
87.1/97.5
258/289
.602/.534

300/201
67%
93.6/100
277/296
.54/.456

303/206
68%
94.5/102
280/304
.467/.401

241/174
72.4%
-
.409/.324

RHS 220 Ported Smithberger Racing Iron

244/82

2.08/1.60
4.155
No Pipe

74/48
64.9%

146/103
70.5%

202/140
69.3%
59.4/69.6
176/206
.706/.636

248/185
74.6%
73/92
216/273
.65/.63

283/206
72.8%
83.3/102
247/304
.593/.561

313/219
70%
92.1/109
273/323
.547/.497

328/226
68.9%
96.5/112
286/333
.491/.44

336/234
69.6%
98.9/116
293/345
.44/.399

343/238
69.4%
101/118
299/351
.399/.36

275/194
70.5%
1.41/2.90
.421/.324

RHS 220 Weingartner Racing Back Cut Alum

N/A

2.02/1.60
4.155
No Pipe

N/A

65/59
90.8%

126/99
78.6%

184/129
70.1%
57.4/64.2
170/190
.662/.586

230/155
67.4%
71.8/77.1
213/228
.621/.528

265/176
66.4%
82.7/87.5
245/259
.572/.48

285/187
65.6%
88.9/93
263/276
.513/.425

289/194
67.1%
90.2/96.5
267/286
.446/.378

282/196
69.5%
88/97.5
261/289
.38/.334

280/196
70%
87.4/97.5
259/289
.336/.297

243/167
68.6%
-
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

RHS 220 Chad Speier Alum

N/A

2.02/-
4.155

N/A

133/-

187/-
58.4
173
.673

233/-
72.7
215
.629

268/-
83.6
248
.579

281/-
87.7
260
.505

282/-
88
261
.435

281/-
87.7
260
.379

280/-
87.4
259
.336

243
-
-
.409

RHS 220 Chad Speier Alum

N/A

2.02/-
4.155

N/A

135/-

183/-
57.1
169
.658

232/-
72.4
214
.626

268/-
83.6
248
.579

291/-
90.8
269
.523

297/-
92.7
275
.458

303/-
94.5
280
.409

305/-
95.2
282
.366

307/-
95.8
284
.331

258
-
-
.409

RHS Pro Action 23 Deg 228 3V Performance CNC

228/-

2.05/1.60
4.03
No Pipe

N/A

78/60
76.9%

144/104
72.2%

199/140
70.4%
60.3/69.6
179/206
.705/.636

249/165
66.3%
75.4/82.1
224/243
.662/.562

280/188
67.1%
84.8/93.5
251/277
.596/.512

302/211
69.9%
91.5/105
271/311
.535/.479

315/214
67.9%
95.4/106
283/315
.479/.417

248/170
68.6%
1.38
.415/.324

RHS Pro Action 23 Deg 235 SF600

235/-

2.08/1.60
4.20

64/72

73/60
82.2%

138/114
82.6%

196/152
77.6%
57.7/75.6
171/224
.685/.69

243/178
73.3%
71.5/88.5
212/262
.637/.606

274/183
66.8%
80.6/91
239/270
.574/.499

292/191
65.4%
85.9/95
255/281
.51/.434

312/195
62.5%
91.8/97
272/287
.467/.38

243/169
69.6%
1.33
.421/.324

RHS Pro Action 23 Deg 235 Meaux Racing Out of Box SF600 Iron

235/-

2.08/1.60
4.00
No Pipe

N/A

102/85
83.3%

158/124
78.5%
46.5/61.7
138/183
.552/.563

199/149
74.9%
58.6/74.1
174/220
.521/.508

239/169
70.7%
70.3/84.1
208/249
.501/.461

275/179
65.1%
80.9/89
240/264
.48/.407

300/188
62.7%
88.3/93.5
262/277
.449/.366

309/191
61.8%
90.9/95
269/281
.405/.325

226/155
68.6%
1.31
.421/.324

RHS Pro Action 23 Deg 235 Meaux Racing Out of Box SF600 Best out of 12 pairs Iron

235/-

2.08/1.60
4.125
No Pipe

N/A

110/85
77.3%

160/128
80%
47.1/63.7
140/189
.559/.581

211/154
73%
62.1/76.6
184/227
.553/.525

255/171
67.1%
75/85
222/252
.535/.466

291/181
62.2%
85.6/90
254/267
.508/.411

310/188
60.6%
91.2/93.5
270/277
.464/.366

311/190
61.1%
91.5/94.5
271/280
.407/.324

310/192
61.9%
91.2/95.5
270/283
.361/.291

245/161
65.8%
1.32
.421/.324

RHS Pro Action 23 Deg 235 Competition Engines

235/-

2.08/1.60
4.03

N/A

113/91
80.5%

161/119
73.9%
47.4/59.2
140/175
.563/.541

209/141
67.5%
61.5/70.1
182/208
.548/.48

248/157
63.3%
73/78.1
216/231
.52/.428

281/166
59.1%
82.7/82.6
245/245
.491/.377

293/173
59%
86.2/86
255/255
.439/.337

218/141
64.9%
1.25
.421/.324

RHS 235 Ported T-Flow

N/A

2.08/1.60
4.16

N/A

139/-

191/158
82.7%
56.2/78.6
167/233
.667/.718

237/-
69.7
207
.621

280/190
67.9%
82.4/94.5
244/280
.587/.518

308/-
90.6
269
.538

316/206
65.2%
93/102
276/304
.473/.401

320/-
94.2
279
.419

321/-
94.5
280
.374

264/185
-
-
.421/.324

RHS Pro Action 14 Deg as Cast

235/-

2.125/1.625

N/A

72/59
81.9%

142/109
76.8%

216/160
74.1%
60.9/77.1
180/229
.739/.716

279/205
73.5%
78.7/98.8
233/293
.716/.688

321/227
70.7%
90.5/109
268/324
.659/.609

345/236
68.4%
97.3/114
288/337
.59/.528

350/246
70.3%
98.7/119
292/351
.513/.471

276/197
71.6%
1.49
.430/.329

RHS 12030 23 Deg Meaux Racing Out of Box SF600 Alum

235/-

2.08/1.60
4.125
No Pipe

N/A

118/98
83.1%

162/141
87%
47.7/70.1
141/208
.566/.64

209/171
81.8%
61.5/85
182/252
.548/.583

251/186
74.1%
73.9/92.5
219/274
.526/.507

277/192
69.3%
81.5/95.5
242/283
.484/.436

278/195
70.1%
81.8/97
242/287
.416/.38

277/196
70.8%
81.5/97.5
242/289
.363/.334

277/196
70.8%
81.5/97.5
242/289
.323/.297

231/172
74.4%
1.18
.421/.324

RHS Pro Topline 235 CNC Out of Box Weingartner Racing

235/-

2.08/1.60
4.125
No Pipe

77/59
76.6%

134/110
82.1%

187/142
75.9%
55/70.6
163/209
.653/.645

236/168
71.2%
69.5/83.6
206/248
.618/.572

274/191
69.7%
80.6/95
239/281
.574/.521

306/200
65.4%
90.1/99.5
267/295
.535/.454

318/204
64.2%
93.6/101
277/301
.476/.397

243/169
69.8%
1.35
.421/.324

RHS 235cc GPA Jet Sprint Ported Kelford Cams Iron

N/A

2.08/1.60

64/72

80/69
86.3%

147/129
87.8%

203/166
81.8%
59.7/82.6
177/245
.709/.754

249/193
77.5%
73.3/96
217/284
.652/.657

280/208
74.3%
82.4/103
244/307
.587/.567

299/213
71.2%
88/106
261/314
.522/.484

312/215
68.9%
91.8/107
272/317
.467/.419

248/187
75.4%
-
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

RHS 235cc Out of Box Chad Speier SF600

N/A

2.08/-
4.155

N/A

121/-

171/-
50.3
149
.597

213/-
62.7
186
.558

253/-
74.5
221
.53

280/-
82.4
244
.489

283/-
83.3
247
.424

283/-
83.3
247
.371

279/-
82.1
243
.325

235
-
-
.421

RHS 235cc Econo Ported Chad Speier

N/A

2.08/1.60

N/A

141/119
84.4%

194/154
79.4%
57.1/76.6
169/227
.678/.699

247/176
71.3%
72.7/87.5
215/259
.647/.60

286/191
66.8%
84.2/95
249/281
.60/.521

314/199
63.4%
92.4/99
274/293
.549/.452

321/201
62.6%
94.5/100
280/296
.481/.391

324/211
65.1%
95.4/105
283/311
.425/.359

261/179
68.5%
-
.421/.324

RHS 235cc Ported Chad Speier

N/A

2.08/1.60
4.155

N/A

140/132
94.3%

200/160
80%
58.9/79.6
174/236
.699/.727

249/189
75.9%
73.3/94
217/279
.652/.644

289/212
73.4%
85.1/105
252/312
.606/.578

321/224
69.8%
94.5/111
280/330
.561/.509

336/232
69%
98.9/115
293/342
.503/.452

338/236
69.8%
99.5/117
295/348
.443/.402

339/-
99.8
296
.395

277/198
-
-
.421/.324

RHS Ported Chad Speier

N/A

2.10/1.60

N/A

340/-
98.2
291
.441

348/-
100
298
.361

344
-
-
.425/.324

RHS Vortec 23 Deg Iron

170/-

1.94/1.50

N/A

252/-
85.3
253
.566

-
-
1.48
.393/.304

RHS Pro Torker Vortec 23 Deg SF600 Iron

170/-

1.94/1.50
4.20

71/59
83.1%

144/114
79.2%

209/146
69.9%
70.7/82.6
209/245
.783/.707

258/159
61.6%
87.3/90
259/267
.725/.578

268/165
61.6%
90.7/93.4
269/277
.602/.48

220/146
66.4%
1.58
.393/.304

RHS Pro Torker Vortec 23 Deg SF600 Iron

170/-

2.02/1.60
4.20

77/74
96.1%

155/140
90.3%

220/168
76.4%
68.6/83.6
203/248
.791/.763

263/172
65.4%
82.1/85.5
243/253
.71/.586

270/174
64.4%
84.3/86.5
250/256
.583/.474

227/164
72%
1.59
.409/.324

RHS Pro Torker 23 Deg Out of Box Weingartner Racing Brez Iron

N/A

2.02/1.60
4.155
No Pipe

N/A

70/54
77.1%

126/106
84.1%

186/143
76.9%
58/71.1
172/211
.669/.65

222/151
68%
69.3/75.1
205/223
.599/.514

254/154
60.6%
79.3/76.6
235/227
.548/.42

235/155
66%
73.3/77.1
217/228
.423/.352

205/142
69.3%
-
.409/.324

RHS 12407 Out of Box 30 BC Randy Iron

170/-

1.94/-
4.06

N/A

135/-

188/-
63.6
188
.704

230/-
77.8
231
.646

241/-
81.5
242
.542

199
-
1.42
.393

RHS 12410 Out of Box 30 BC Randy Iron

170/-

2.02/-
4.06

N/A

143/-

198/-
61.8
183
.712

233/-
72.7
215
.629

246/-
76.8
227
.531

205
-
1.45
.409

Trick Flow G1 SF600

180/-

2.02/1.60
4.03
1 3/4" Pipe

66/52
78.8%

143/110
76.9%

187/148
79.1%
58.4/73.6
173/218
.673/.672

223/178
79.8%
69.6/88.5
206/262
.602/.606

232/194
83.6%
72.4/96.5
214/286
.501/.529

240/204
85%
74.9/101
222/301
.432/.463

205/167
81.4%
1.33
.409/.324

Trick Flow G2 31500005 CARB SF600

190/82

2.02/1.60
4.03
1 3/4" Pipe

68/53
77.9%

144/106
73.6%

206/144
69.9%
64.3/71.6
190/212
.741/.654

242/173
71.5%
75.5/86
224/255
.653/.589

252/195
77.4%
78.6/97
233/287
.544/.531

257/205
79.8%
80.2/102
238/302
.462/.466

220/165
74.8%
1.35/2.50
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Trick Flow 18 Deg Ultra SF600

230/-

2.15/1.60

334/256
76.6%
92/127
273/377
.484/.498

-
-
1.45
.435/.324

Trick Flow 18 Deg Ultra Race SF600

250/100

2.15/1.60
4.155
2" Pipe

73/61
83.6%

144/113
78.5%

215/158
73.5%
59.2/78.6
175/233
.727/.718

274/200
73%
75.5/99.5
224/295
.695/.681

313/230
73.5%
86.2/114
255/339
.635/.627

334/248
74.3%
92/123
273/365
.564/.563

334/256
76.6%
92/127
273/377
.484/.498

269/201
74.7%
1.34/2.56
.435/.324

Trick Flow 18 Deg SF600 Alum

250/100

2.15/1.625

144/113
78.5%

217/152
70%
59.8/73.3
177/217
.733/.68

276/198
71.7%
76/95.5
225/283
.70/.664

316/219
69.3%
87/106
258/313
.641/.588

328/231
70.4%
90.3/111
268/330
.554/.517

328/237
72.3%
90.3/114
268/339
.475/.454

268/192
71.5%
1.31/2.37
.435/.329

Trick Flow 18 Deg Cartridge Roll Clean-up SF600 Alum

250/100

2.15/1.60
4.155
2 pipe

73/61
83.6%

144/113
78.5%

215/158
73.5%
59.2/78.6
175/233
.727/.718

274/197
71.9%
75.5/98
224/290
.695/.671

313/224
71.6%
86.2/111
255/330
.635/.61

334/237
71%
92/118
273/349
.564/.538

334/246
73.7%
92/122
273/363
.484/.479

269/196
72.8%
1.34/2.46
.435/.324

Trick Flow 18 Deg CNC Chamber Intake Port Match SF600 Alum

250/100

2.15/1.60
4.155

N/A

71/-

149/-

221/-
60.9
180
.747

277/-
76.3
226
.702

319/-
87.9
260
.647

351/-
96.7
286
.593

343/-
94.5
280
.497

277
-
1.40
.435/.324

Trick Flow 18 Deg Ported TEA Alum

274/109

2.18/1.60

N/A

60/52
86.7%

131/120
91.6%

209/175
83.7%
56/87
166/258
.697/.795

275/229
83.3%
73.7/114
218/337
.688/.78

333/273
82%
89.2/136
264/402
.666/.744

369/294
79.7%
98.9/146
293/433
.615/.668

381/308
80.8%
102/153
302/454
.544/.60

390/317
81.3%
104/158
310/467
.488/.54

396/324
81.8%
106/161
314/477
.44/.491

311/255
82.1%
1.45/2.97
.441/.324

Trick Flow 18 Deg Ported TEA Alum

275/95

2.18/1.60
4.185
2" Pipe

N/A

64/55
85.9%

137/124
90.5%

220/190
86.4%
58.9/94.5
175/280
.733/.863

286/243
85%
76.6/121
227/358
.715/.828

340/285
83.8%
91.1/142
270/420
.68/.777

383/305
79.6%
103/152
304/449
.638/.693

402/313
77.9%
108/156
319/461
.574/.609

404/316
78.2%
108/157
321/466
.505/.538

405/320
79%
109/159
321/472
.45/.484

322/262
81.3%
1.47/3.37
.441/.324

Trick Flow 18 Deg Ported TEA Alum

295/109

2.20/1.60

N/A

64/52
81.3%

133/120
90.2%

216/175
81%
56.8/87
168/258
.714/.795

282/229
81.2%
74.2/114
220/337
.699/.78

340/273
80.3%
89.4/136
265/402
.674/.744

385/294
76.4%
101/146
300/433
.636/.668

412/308
74.8%
108/153
321/454
.583/.60

420/317
75.5%
110/158
327/467
.52/.54

425/324
76.2%
112/161
331/477
.468/.491

327/255
78.1%
1.44/2.97
.446/.324

Trick Flow 18 Deg Ported BES Alum

258/-

2.15/1.60

129/108
83.7%

197/150
76.1%
54.3/74.6
161/221
.666/.681

258/182
70.5%
71.1/90.5
211/268
.654/.62

302/208
68.9%
83.2/103
246/307
.612/.567

336/224
66.7%
92.5/111
274/330
.568/.509

358/235
65.6%
98.6/117
292/346
.519/.457

364/240
65.9%
100/119
297/354
.461/.409

278/192
69.3%
1.41
.435/.324

Trick Flow 30400001 Alum CHP

195/73

2.02/1.60

60/43
71.7%

125/86
68.8%

174/117
67.2%
54.3/58.2
161/172
.626/.531

215/144
67%
67.1/71.6
199/212
.58/.491

239/162
67.8%
74.6/80.6
221/239
.516/.441

243/175
72%
75.8/87
225/258
.437/.397

199/137
68.7%
1.25/2.40
.409/.324

Trick Flow 23 Deg Super Street SF600 Alum

175/67

1.94/1.50
4.03
1 3/4" Pipe

62/57
91.9%

127/109
85.8%

180/142
78.9%
60.9/80.4
180/238
.674/.688

219/167
76.3%
74.1/94.5
220/280
.615/.607

242/181
74.8%
81.9/102
243/303
.544/.526

245/192
78.4%
82.9/109
246/322
.459/.465

203/158
78.1%
1.40/2.87
.393/.304

Trick Flow 23 Deg Super Street Alum

175/67

1.94/1.50

61/53
86.9%

127/105
82.7%

180/142
78.9%
60.9/80.4
180/238
.674/.688

216/160
74.1%
73.1/90.5
217/268
.607/.581

242/172
71.1%
81.9/97.3
243/288
.544/.50

242/180
74.4%
81.9/102
243/302
.453/.436

201/152
75.4%
1.38/2.69
.393/.304

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Trick Flow 23 Deg Super Street/Strip SF600 Alum

195/72

2.02/1.60

254/190
74.8%
79.3/94.5
235/280
.457/.431

-
-
1.30/2.64
.409/.324

Trick Flow 23 Deg Super Street/Strip CNC Chamber SF600 Alum

195/72

2.02/1.60
4.03
1 3/4" Pipe

71/53
74.6%

142/99
69.7%

196/135
68.9%
61.2/67.1
181/199
.705/.613

234/167
71.4%
73/83.1
216/246
.631/.569

249/186
74.7%
77.7/92.5
230/274
.537/.507

249/199
79.9%
77.7/99
230/293
.448/.452

214/157
73.5%
1.28/2.76
.409/.324

Trick Flow 23 Deg Super Race SF600 Alum

215/78

2.08/1.60
4.155
1 7/8" Pipe

67/72

66/57
86.4%

141/107
75.9%

199/145
72.9%
58.6/72.1
174/214
.695/.659

244/175
71.7%
71.8/87
213/258
.639/.596

273/190
69.6%
80.3/94.5
238/280
.572/.518

282/198
70.2%
83/98.5
246/292
.493/.45

287/203
70.7%
84.5/101
250/299
.43/.395

238/170
71.4%
1.33/2.60
.421/.324

Trick Flow 23 Deg Super 215 3240 SF600 Alum

215/78

2.08/1.60
4.155
1 7/8" Pipe

67/72

66/58
87.9%

141/108
76.6%

199/147
73.9%
58.6/73.1
174/217
.695/.668

244/180
73.8%
71.8/89.5
213/265
.639/.613

273/202
74%
80.3/100
238/298
.572/.551

282/214
75.9%
83/106
246/315
.493/.486

287/223
77.7%
84.5/111
250/329
.43/.434

238/179
75.3%
1.33/2.86
.421/.324

Trick Flow 23 Deg Super Race CNC SF600 Alum

230/78

2.08/1.60
4.155
1 7/8" Pipe

69/55
79.7%

144/112
77.8%

213/158
74.2%
62.7/78.6
186/233
.744/.718

265/195
73.6%
78/97
231/287
.694/.664

296/220
74.3%
87.1/109
258/324
.621/.60

305/234
76.7%
89.8/116
266/345
.533/.531

310/240
77.4%
91.2/119
270/354
.464/.467

256/193
75.6%
1.35/3.08
.421/.324

Trick Flow TFS 23 Deg CHP

N/A

2.02/1.60

N/A

65/70
107%

133/102
76.7%

188/140
74.5%
58.7/69.6
174/206
.676/.636

226/164
72.6%
70.5/81.6
209/242
.61/.559

250/183
73.2%
78/91
231/270
.54/.499

199/147
73.9%
-
.409/.324

Trick Flow R 23 Deg SF600 Alum

215/78

2.08/1.60
-
Pipe

66/57
86.4%

141/107
75.9%

199/145
72.9%
58.6/72.1
174/214
.695/.659

244/175
71.7%
71.8/87
213/258
.639/.596

273/190
69.6%
80.3/94.5
238/280
.572/.518

282/198
70.2%
83/98.5
246/292
.493/.45

287/203
70.7%
84.5/101
250/299
.43/.395

238/170
71.4%
1.33/2.60
.421/.324

Trick Flow Duttweiler 23 Deg SF600 Alum

195/72

2.02/1.60

51/58
113%

136/98
72.1%

191/136
71.2%
59.6/67.6
177/200
.687/.618

230/163
70.9%
71.8/81.1
213/240
.621/.555

253/177
70%
78.9/88
234/261
.546/.482

254/190
74.8%
79.3/94.5
235/280
.457/.431

213/153
71.8%
1.30/2.64
.409/.324

Trick Flow Duttweiler 23 Deg CNC Chamber SF600 Alum

195/72

2.02/1.60

64/56
87.5%

138/105
76.1%

198/146
73.7%
61.8/72.6
183/215
.712/.663

237/171
72.2%
74/85
219/252
.639/.583

257/186
72.4%
80.2/92.5
238/274
.555/.507

258/196
76%
80.5/97.5
239/289
.464/.445

218/161
73.9%
1.32/2.72
.409/.324

Trick Flow 23 Deg Ported TEA Alum

200/-

2.02/1.60
4.03
Pipe 1 3/4

N/A

68/54
79.4%

143/117
81.8%

217/177
81.6%
67.7/88
201/261
.781/.804

263/219
83.3%
82.1/109
243/323
.71/.746

290/243
83.8%
90.5/121
268/358
.626/.662

294/257
87.4%
91.7/128
272/379
.529/.584

241/203
83.9%
1.47
.409/.324

Trick Flow 23 Deg Ported TEA Alum

N/A

2.08/1.60
4.125
Pipe 2"

N/A

69/52
75.4%

144/119
82.6%

210/182
86.7%
61.8/90.5
183/268
.734/.827

260/224
86.2%
76.5/111
227/330
.681/.763

300/247
82.3%
88.3/123
262/364
.629/.673

314/257
81.8%
92.4/128
274/379
.549/.584

318/262
82.4%
93.6/130
277/386
.476/.51

258/215
83.5%
-
.421/.324

World S/R Replacement SF600 Iron

170/65

1.94/1.50
-
No Pipe

58/67/76

232/161
69.4%
78.5/91.1
233/270
.521/.468

-
-
1.36/2.48
.393/.304

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

World S/R Replacement SF1020 Iron

170/65

1.94/1.50
-
No Pipe

58/67/76

220/151
68.6%
74.4/85.4
221/253
.494/.439

-
-
1.29/2.32
.393/.304

World S/R Torquer SF600 Iron

170/65

2.02/1.60
-
No Pipe

67/76

63/53
84.1%

129/102
79.1%

186/137
73.7%
58/68.1
172/202
.669/.622

217/146
67.3%
67.7/72.6
201/215
.586/.497

235/151
64.3%
73.3/75.1
217/223
.507/.412

222/153
68.9%
69.3/76.1
205/225
.399/.347

219/154
70.3%
68.3/76.6
202/227
.338/.30

217/154
71%
67.7/76.6
201/227
.293/.262

204/142
70%
1.38/2.37
.409/.324

World S/R Torquer SF1020 Iron

170/65

2.02/1.60
-
No Pipe

67/76

60/50
83.3%

123/97
78.9%

177/130
73.4%
55.2/64.7
164/192
.637/.59

206/139
67.5%
64.3/69.1
190/205
.556/.474

223/143
64.1%
69.6/71.1
206/211
.481/.39

211/145
68.7%
65.8/72.1
195/214
.38/.329

208/146
70.2%
64.9/72.6
192/215
.321/.284

206/146
70.9%
64.3/72.6
190/215
.278/.249

193/135
69.9%
1.31/2.25
.409/.324

World S/R Torque Iron CHP

171/82

2.02/1.60
-
No Pipe

67/76

68/55
80.9%

128/100
78.1%

179/133
74.3%
55.9/66.1
165/196
.644/.604

205/145
70.7%
64/72.1
190/214
.553/.494

221/153
69.2%
69/76.1
204/225
.477/.417

225/155
68.9%
70.2/77.1
208/228
.405/.352

192/137
71.6%
1.32/1.89
.409/.324

World S/R Torque Iron CHP

171/82

2.02/1.60
-
Pipe

67/76

68/55
80.9%

128/104
81.3%

179/140
78.2%
55.9/69.6
165/206
.644/.636

205/156
76.1%
64/77.6
190/230
.553/.531

221/166
75.1%
69/82.6
204/245
.477/.452

225/170
75.6%
70.2/84.6
208/251
.405/.386

192/147
76.8%
1.32/2.07
.409/.324

World S/R Torquer Ported Blackstone Iron

180/-

1.94/1.50

81/66
81.5%

151/123
81.5%

214/149
69.6%
72.4/84.3
215/250
.802/.722

252/162
64.3%
85.3/91.7
253/272
.708/.589

258/172
66.7%
87.3/97.3
259/288
.58/.50

266/177
66.5%
90/100
267/297
.498/.429

270/177
65.6%
91.3/100
271/297
.433/.368

235/160
68%
1.50
.393/.304

World S/R Torque Tri-Mark Iron

N/A

2.02/1.60

N/A

64/53
82.8%

128/110
85.9%

176/126
71.6%
54.9/62.7
163/186
.633/.572

194/135
69.6%
60.5/67.1
179/199
.523/.46

196/136
69.4%
61.2/67.6
181/200
.423/.371

198/137
69.2%
61.8/68.1
183/202
.356/.311

178/129
72.2%
-
.409/.324

World S/R Torque Ported Tri-Mark Stealth Iron

N/A

2.02/1.60

N/A

70/59
84.3%

137/114
83.2%

188/136
72.3%
58.7/67.6
174/200
.676/.618

220/149
67.7%
68.6/74.1
203/220
.594/.508

227/155
68.3%
70.8/77.1
210/228
.49/.422

230/160
69.6%
71.8/79.6
213/236
.414/.363

200/143
71.3%
-
.409/.324

World CHP Iron

200/-

2.02/1.60
-
No Pipe

N/A

132/98
74.2%

187/123
65.8%
58.4/61.2
173/181
.673/.559

225/138
61.3%
70.2/68.6
208/203
.607/.47

240/150
62.5%
74.9/74.6
222/221
.518/.409

243/156
64.2%
75.8/77.6
225/230
.437/.354

205/133
64.8%
1.22
.409/.324

World Sportsman II SF600 Iron

200/69

2.02/1.60
-
No Pipe

64/72

260/176
67.7%
81.1/87.5
240/259
.468/.40

-
-
1.30/2.55
.409/.324

World Sportsman II Iron

200/64

2.02/1.60
-
Pipe

64/72

187/131
70.1%
58.4/65.2
173/193
.673/.595

225/150
66.7%
70.2/74.6
208/221
.607/.511

240/164
68.3%
74.9/81.6
222/242
.518/.447

243/162
66.7%
75.8/80.6
225/239
.437/.368

224/152
67.8%
1.22/2.56
.409/.324

World Sportsman II Cast Heads Iron

N/A

2.02/1.60

N/A

64/60
93.8%

130/107
82.3%

186/123
66.1%
58/61.2
172/181
.669/.559

212/136
64.2%
66.2/67.6
196/200
.572/.463

230/142
61.7%
71.8/70.6
213/209
.496/.387

231/143
61.9%
72.1/71.1
214/211
.416/.325

235/143
60.9%
73.3/71.1
217/211
.362/.278

204/132
64.9%
-
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

World Sportsman II Out of Box Weingartner Racing Iron

N/A

2.02/1.60
4.125
No Pipe

N/A

72/55
76.4%

133/97
72.9%

182/128
70.3%
56.8/63.7
168/189
.655/.581

228/145
63.6%
71.1/72.1
211/214
.615/.494

257/160
62.3%
80.2/79.6
238/236
.555/.436

264/183
69.3%
82.4/91
244/270
.475/.416

263/194
73.8%
82.1/96.5
243/286
.406/.378

221/151
68.3%
-
.409/.324

World Sportsman II Ported Cast Heads Iron

N/A

2.02/1.60

N/A

68/58
85.3%

139/118
84.9%

196/158
80.6%
61.2/78.6
181/233
.705/.718

235/178
75.7%
73.3/88.5
217/262
.634/.606

256/186
72.7%
79.9/92.5
237/274
.553/.507

272/190
69.9%
84.9/94.5
251/280
.489/.431

278/192
69.1%
86.7/95.5
257/283
.429/.374

229/170
74.3%
-
.409/.324

World Sportsman II Ported Iron

212/-

2.05/1.60
-
No Pipe

N/A

189/145
76.7%
57.3/72.1
170/214
.67/.659

238/170
71.4%
72.1/84.6
214/251
.633/.579

270/182
67.4%
81.8/90.5
242/268
.574/.496

284/190
66.9%
86/94.5
255/280
.503/.431

245/172
70%
1.34
.415/.324

World Sportsman II Dr Js Performance Iron

200/-

2.02/1.60
-
Pipe

N/A

65/63
96.9%

134/110
82.1%

188/130
69.1%
58.7/64.7
174/192
.676/.59

214/143
66.8%
66.8/71.1
198/211
.577/.487

224/150
67%
69.9/74.6
207/221
.484/.409

231/153
66.2%
72.1/76.1
214/225
.416/.347

234/156
66.7%
73/77.6
216/230
.361/.304

204/140
68.7%
1.17
.409/.324

World Sportsman II Ported Dr Js Performance Iron

N/A

2.05/1.60
-
Pipe

N/A

72/64
88.9%

140/110
78.6%

194/134
69.1%
58.8/66.6
174/197
.688/.609

236/163
69.1%
71.5/81.1
212/240
.627/.555

261/205
78.5%
79.1/102
234/302
.555/.559

271/223
82.3%
82.1/111
243/329
.48/.506

276/233
84.4%
83.6/116
248/343
.419/.454

230/178
77.5%
-
.415/.324

World Sportsman II Ported Iron

N/A

2.02/1.60
4.155

N/A

62/64
103%

134/118
88.1%

193/158
81.9%
60.2/78.6
178/233
.694/.718

239/199
83.3%
74.6/99
221/293
.645/.678

263/215
81.7%
82.1/107
243/317
.568/.586

268/224
83.6%
83.6/111
248/330
.482/.509

219/183
83.3%
-
.409/.324

World Sportsman II Ported Bullet Cylinder Heads Iron

219/89

2.05/1.60

72/57
79.2%

145/105
72.4%

206/142
68.9%
62.4/70.6
185/209
.73/.645

250/167
66.8%
75.7/83.1
224/246
.665/.569

270/190
70.4%
81.8/94.5
242/280
.574/.518

288/202
70.1%
87.3/100
259/298
.51/.459

297/215
72.4%
90/107
267/317
.451/.419

243/170
70.1%
1.36/2.42
.415/.324

World Sportsman 200 Tri-Mark Stealth Iron

200/-

2.02/1.60

N/A

61/60
98.4%

128/113
88.3%

184/135
73.4%
57.4/67.1
170/199
.662/.613

210/140
66.7%
65.5/69.6
194/206
.567/.477

230/144
62.6%
71.8/71.6
213/212
.496/.392

235/146
62.1%
73.3/72.6
217/215
.423/.332

197/136
68.7%
1.18
.409/.324

World Sportsman 200 Ported Tri-Mark Stealth Iron

N/A

2.02/1.60

N/A

70/59
84.3%

144/120
83.3%

197/147
74.6%
61.5/73.1
182/217
.709/.668

230/161
70%
71.8/80.1
213/237
.621/.548

247/170
68.8%
77.1/84.6
228/251
.533/.463

255/174
68.2%
79.6/86.5
236/256
.459/.395

215/154
71.9%
-
.409/.324

World Motown 220 SF600 Iron

220/70

2.08/1.60
-
No Pipe

66/56
84.8%

132/117
88.6%

191/154
80.6%
56.2/76.6
167/227
.667/.699

235/176
74.9%
69.2/87.5
205/259
.616/.60

266/189
71.1%
78.3/94
232/279
.558/.515

284/198
69.7%
83.6/98.5
248/292
.496/.45

287/202
70.4%
84.5/100
250/298
.43/.393

284/205
72.2%
83.6/102
248/302
.372/.349

240/177
73.9%
1.30/2.93
.421/.324

World Motown 220

220/70

2.08/1.60

N/A

125/105
84%

187/139
74.3%
55/69.1
163/205
.653/.631

225/166
73.8%
66.2/82.6
196/245
.59/.565

248/182
73.4%
73/90.5
216/268
.52/.496

263/190
72.2%
77.4/94.5
229/280
.459/.431

266/193
72.6%
78.3/96
232/284
.398/.376

219/163
74.2%
1.21/2.76
.421/.324

World Motown 220 Iron CHP

220/79

2.06/1.60

60/50
83.3%

123/109
88.6%

177/142
80.2%
53.1/70.6
157/209
.624/.645

222/172
77.5%
66.6/85.5
197/253
.587/.586

243/187
77%
72.9/93
216/276
.514/.51

260/195
75%
78/97
231/287
.459/.443

205/161
78.5%
1.18/2.47
.417/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

World Motown 215 SF600 Alum

215/70

2.08/1.60
-
No Pipe

N/A

69/54
78.3%

128/107
83.6%

180/141
78.3%
53/70.1
157/208
.629/.64

227/162
71.4%
66.8/80.6
198/239
.595/.552

263/177
67.3%
77.4/88
229/261
.551/.482

279/186
66.7%
82.1/92.5
243/274
.487/.422

268/194
72.4%
78.9/96.5
234/286
.401/.378

268/197
73.5%
78.9/98
234/290
.351/.336

230/166
72.2%
1.30/2.81
.421/.324

World Motown 215 SF1020 Alum

215/70

2.08/1.60
-
No Pipe

N/A

66/51
77.3%

122/102
83.6%

171/134
78.4%
50.3/66.6
149/197
.597/.609

216/154
71.3%
63.6/76.6
188/227
.566/.525

250/168
67.2%
73.6/83.6
218/248
.524/.458

265/177
66.8%
78/88
231/261
.463/.402

255/184
72.2%
75/91.5
222/271
.382/.358

255/187
73.3%
75/93
222/276
.334/.319

219/158
72.1%
1.23/2.67
.421/.324

World Motown 235 SF600 Alum

235/70

2.08/1.60
-
No Pipe

65/56
86.2%

135/107
79.3%

198/147
74.2%
58.3/73.1
173/217
.692/.668

247/174
70.4%
72.7/86.5
215/256
.647/.593

284/174
61.3%
83.6/86.5
248/256
.595/.474

296/203
68.6%
87.1/101
258/299
.517/.461

300/211
70.3%
88.3/105
262/311
.449/.411

301/215
71.4%
88.6/107
262/317
.394/.366

252/176
69.9%
1.28/3.07
.421/.324

World Motown 235 SF1020 Alum

235/70

2.08/1.60
-
No Pipe

62/53
85.5%

128/102
79.7%

188/140
74.5%
55.3/69.6
164/206
.657/.636

235/165
70.2%
69.2/82.1
205/243
.616/.562

270/183
67.8%
79.5/91
235/270
.566/.499

281/193
68.7%
82.7/96
245/284
.491/.438

285/200
70.2%
83.9/99.5
249/295
.427/.389

286/204
71.3%
84.2/101
249/301
.375/.347

239/170
71%
1.22/2.91
.421/.324

World Motown 250 CNC SF600 Alum

250/-

2.10/1.60
-
No Pipe

N/A

73/66
90.4%

137/123
89.8%

206/166
80.6%
59.5/82.6
176/245
.713/.754

262/193
73.7%
75.6/96
224/284
.68/.657

297/211
71%
85.7/105
254/311
.617/.575

309/222
71.8%
89.2/110
264/327
.535/.504

319/229
71.8%
92.1/114
273/337
.473/.446

322/232
72%
93/115
275/342
.418/.395

265/197
74.3%
1.29
.425/.324

World Motown 23 Deg SF600 Alum

235/70

2.08/1.60
-
No Pipe

304/219
72%
89.5/109
265/323
.398/.373

-
-
1.29/3.13
.421/.324

World Motown 23 Deg CNC SF600 Alum

235/70

2.08/1.60
-
No Pipe

329/238
72.3%
96.8/118
287/351
.431/.405

-
-
1.40/3.40
.421/.324

World Motown 23 Deg CNC SF1020 Alum

235/70

2.08/1.60
-
No Pipe

306/220
71.9%
90.1/109
267/324
.401/.375

-
-
1.30/3.14
.421/.324

World Motown 23 Deg / Kuntz CNC Alum

250/90

2.10/1.60

-
-
-
.425/.324

World Motown 23 Deg Vortec SF600 Alum

215/70

2.08/1.60
-
No Pipe

283/189
66.8%
83.3/94
247/279
.494/.429

-
-
1.32/2.70
.421/.324

World Motown 23 Deg Vortec SF1020 Alum

215/70

2.08/1.60
-
No Pipe

265/177
66.8%
78/88
231/261
.463/.402

-
-
1.23/2.53
.421/.324

Ultra Pro Machining Billet 9 Deg Alum

N/A

2.20/1.625

N/A

70/54
77.1%

153/103
67.3%

227/156
68.7%
59.7/75.2
177/223
.75/.698

300/209
69.7%
78.9/101
234/299
.743/.701

360/243
67.5%
94.7/117
281/347
.714/.652

406/266
65.5%
107/128
316/380
.671/.595

421/279
66.3%
111/135
328/399
.596/.535

311/209
67.3%
-
.446/.329

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Ultra Pro Machining Billet 9 Deg 4.5" BS I-50 E-50 Alum

N/A

2.23/1.625

N/A

73/54
74%

153/109
71.2%

237/166
70%
60.7/80
180/237
.772/.742

310/220
71%
79.4/106
235/314
.758/.738

368/250
67.9%
94.2/121
279/357
.72/.671

415/274
66%
106/132
315/391
.676/.613

423/287
67.8%
108/138
321/410
.591/.55

433/294
67.9%
111/142
328/420
.529/.493

334/229
68.4%
-
.452/.329

Ultra Pro Machining Billet 9 Deg 4.5" BS I-55 E-55 Alum

320/215

2.25/1.60

N/A

65/53
81.5%

135/104
77%

224/160
71.4%
56.3/79.6
167/236
.724/.727

297/216
72.7%
74.7/107
221/318
.719/.736

363/249
68.6%
91.3/124
271/367
.703/.679

413/275
66.6%
104/137
308/405
.667/.625

440/288
65.5%
111/143
328/424
.609/.561

440/295
67%
111/147
328/435
.533/.502

330/227
68.6%
1.38/1.37
.456/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS Ported Texas Speed Alum

N/A

2.02/1.57
3.90
No Pipe

N/A

65/60
92.3%

131/106
80.9%

192/146
76%
59.9/75.4
178/223
.691/.676

241/181
75.1%
75.2/93.5
223/277
.65/.628

273/203
74.4%
85.2/105
252/311
.589/.564

292/218
74.7%
91.1/113
270/334
.525/.505

226/171
75.6%
-
.409/.318

GM LSX CNC Texas Speed Alum

274/83

2.20/1.61
-
No Pipe

72/64
88.9%

171/106
62%

249/154
61.8%
65.5/75.6
194/224
.823/.695

309/200
64.7%
81.3/98.2
241/291
.766/.677

354/232
65.5%
93.1/114
276/338
.702/.628

384/248
64.6%
101/122
299/361
.634/.56

397/261
65.7%
104/128
309/380
.562/.505

311/200
64.4%
1.45/3.14
.446/.326

GM LS1 853 SF600 Alum

200/70

2.00/1.55

66.7

67/52
77.6%

122/97
79.5%

178/133
74.7%
56.7/70.5
168/209
.647/.624

215/156
72.6%
68.4/82.7
203/245
.586/.549

219/170
77.6%
69.7/90.1
207/267
.477/.478

227/180
79.3%
72.3/95.4
214/283
.412/.422

192/147
76.6%
1.14/2.57
.405/.314

GM LS1 853 Ported MTI Stage IIE Alum

N/A

2.02/1.55

N/A

65/53
81.5%

135/105
77.8%

195/141
72.3%
60.8/74.7
180/221
.702/.661

244/165
67.6%
76.1/87.4
226/259
.658/.58

276/193
69.9%
86.1/102
255/303
.596/.543

300/211
70.3%
93.6/112
277/331
.54/.495

230/163
70.9%
-
.409/.314

GM LS1 SF600

N/A

2.00/1.55
3.90
1 7/8" Pipe

N/A

136/108
79.4%

196/145
74%
62.4/76.8
185/228
.712/.68

217/170
78.3%
69.1/90.1
205/267
.591/.598

224/186
83%
71.3/98.6
211/292
.488/.523

230/198
86.1%
73.2/105
217/311
.418/.464

201/161
80.5%
-
.405/.314

GM LS1 Alum

204/70

2.00/1.55
3.90

N/A

148/103
69.6%

200/152
76%
63.7/80.6
189/239
.727/.713

216/167
77.3%
68.8/88.5
204/262
.589/.587

225/181
80.4%
71.6/95.9
212/284
.491/.509

238/190
79.8%
75.8/101
224/298
.432/.445

205/159
77.2%
1.17/2.71
.405/.314

GM LS1 Alum

204/70

2.00/1.55

123/108
87.8%

180/147
81.7%
57.3/77.9
170/231
.654/.689

219/172
78.5%
69.7/91.2
207/270
.597/.605

231/193
83.5%
73.5/102
218/303
.504/.543

188/155
82.3%
1.13/2.76
.405/.314

GM LS1 Alum CHP

204/-

2.00/1.55
-
Pipe

83/62
74.7%

134/104
77.6%

189/136
72%
60.2/72.1
178/214
.687/.638

222/165
74.3%
70.7/87.4
209/259
.605/.58

240/179
74.6%
76.4/94.9
226/281
.523/.504

252/185
73.4%
80.2/98
238/290
.458/.434

207/154
74.2%
1.24
.405/.314

GM LS1 241 Alum HRM

205/70

2.00/1.55
4.03

64/55
85.9%

137/106
77.4%

190/141
74.2%
60.5/74.7
179/221
.69/.661

216/179
82.9%
68.8/94.9
204/281
.589/.629

228/193
84.6%
72.6/102
215/303
.497/.543

238/203
85.3%
75.8/108
224/319
.432/.476

244/206
84.4%
77.7/109
230/323
.38/.414

209/171
82%
1.19/2.94
.405/.314

GM LS1 Ported AP Engineering Alum

235/-

2.02/1.575
3.970
Pipe

N/A

73/54
74%

150/111
74%

207/155
74.9%
64.6/79.6
191/236
.745/.715

252/195
77.4%
78.6/100
233/297
.68/.675

285/221
77.5%
88.9/113
263/336
.615/.612

292/231
79.1%
91.1/119
270/351
.525/.533

301/237
78.7%
93.9/122
278/360
.464/.469

248/192
77.3%
1.28
.409/.319

GM LS1 Ported ET Performance 215 SF600 Alum

215/-

2.04/1.57
3.90
No Pipe

35-72

74/57
77%

152/106
69.7%

219/150
68.5%
67/77.5
199/230
.78/.694

266/190
71.4%
81.4/98.1
241/291
.711/.66

301/204
67.8%
92.1/105
273/312
.643/.567

320/211
65.9%
97.9/109
290/323
.57/.488

252/172
68.4%
1.49
.413/.318

GM LS1 Ported ET Performance 224 SF600 Alum

224/-

2.02/1.57
3.90
No Pipe

68/56
82.4%

143/112
78.3%

196/158
80.6%
61.2/81.6
181/242
.705/.731

247/190
76.9%
77.1/98.1
228/291
.666/.66

280/206
73.6%
87.4/106
259/315
.604/.572

303/214
70.6%
94.5/111
280/328
.545/.495

311/218
70.1%
97/113
288/334
.48/.432

247/183
74.2%
1.39
.409/.318

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS1 Ported ET Performance 225 SF600 Alum

225/-

2.08/1.57
4.00
No Pipe

35-72

71/57
80.3%

153/114
74.5%

208/164
78.8%
61.2/84.7
181/251
.727/.759

265/204
77%
78/105
231/312
.694/.708

308/224
72.7%
90.6/116
269/343
.646/.622

328/231
70.4%
96.5/119
286/354
.573/.535

320/236
73.8%
94.2/122
279/361
.479/.468

264/196
74.1%
1.46
.421/.318

GM LS1 CNC M2 Alum

N/A

2.02/1.60

N/A

66/54
81.8%

141/114
80.9%

195/160
82.1%
60.8/79.6
180/236
.702/.727

252/190
75.4%
78.6/94.5
233/280
.68/.647

292/206
70.5%
91.1/102
270/304
.63/.561

317/220
69.4%
98.9/109
293/324
.57/.50

239/178
74.4%
-
.409/.324

GM LS1 Ported No Rush Alum

N/A

2.02/1.57
-
No Pipe

N/A

70/57
81.4%

151/108
71.5%

209/154
73.7%
65.2/79.5
193/236
.752/.713

260/188
72.3%
81.1/97.1
240/288
.702/.653

287/210
73.2%
89.6/108
265/321
.62/.583

288/220
76.4%
89.9/114
266/337
.518/.509

297/227
76.4%
92.7/117
275/347
.458/.45

290/204
70.3%
90.5/105
268/312
.391/.354

255/187
73.6%
-
.409/.318

GM LS1 Ported No Rush Alum

N/A

2.02/1.57
-
Pipe

N/A

70/57
81.4%

151/113
74.8%

209/167
79.9%
65.2/86.3
193/256
.752/.773

260/212
81.5%
81.1/110
240/324
.702/.736

287/233
81.2%
89.6/120
265/357
.62/.647

288/249
86.5%
89.9/129
266/381
.518/.576

297/254
85.5%
92.7/131
275/389
.458/.504

290/204
70.3%
90.5/105
268/312
.391/.354

255/205
80.4%
-
.409/.318

GM LS1 Ported Bullet Cylinder Heads Stage I Alum

217/85

2.00/1.57

77/54
70.1%

144/113
78.5%

213/158
74.2%
67.8/81.6
201/242
.774/.731

259/191
73.7%
82.4/98.7
244/292
.706/.663

262/206
78.6%
83.4/106
247/315
.571/.572

265/213
80.4%
84.4/110
250/326
.481/.493

229/176
77.1%
1.22/2.51
.405/.318

GM LS1 Ported Bullet Cylinder Heads Stage II Alum

221/91

2.02/1.575

72/57
79.2%

141/113
80.1%

203/158
77.8%
63.3/81.1
188/240
.73/.729

256/191
74.6%
79.9/98
237/290
.691/.661

280/206
73.6%
87.4/106
259/313
.604/.57

296/213
72%
92.4/109
274/324
.532/.491

235/176
74.9%
1.34/2.34
.409/.319

GM LS1 Ported Bullet Cylinder Heads Stage III Alum

225/91

2.08/1.575

72/57
79.2%

141/113
80.1%

203/158
77.8%
59.7/81.1
177/240
.709/.729

256/191
74.6%
75.3/98
223/290
.671/.661

280/206
73.6%
82.4/106
244/313
.587/.57

296/213
72%
87.1/109
258/324
.517/.491

235/176
74.9%
1.32/2.34
.421/.319

GM 5.3L CCM Alum

205/-

1.89/1.55
3.78

65/52
80%

133/101
75.9%

189/134
70.9%
67.4/71
200/210
.727/.628

208/161
77.4%
74.1/85.3
220/253
.60/.566

219/175
79.9%
78.1/92.7
231/275
.505/.492

223/187
83.9%
79.5/99.1
236/294
.429/.438

194/152
78%
1.09
.383/.314

GM 5.3L Ported West Coast Stage 1 CCM Alum

209/-

1.94/1.57
3.78

65/57
87.7%

141/109
77.3%

187/150
80.2%
63.3/77.5
187/230
.701/.694

227/175
77.1%
76.8/90.4
228/268
.638/.608

256/198
77.3%
86.6/102
257/303
.575/.55

252/211
83.7%
85.3/109
253/323
.472/.488

213/169
79.3%
1.22
.393/.318

GM 5.3L Ported Stage II ForceFed High Performance

N/A

2.02/1.57

N/A

67/62
92.5%

133/109
82%

194/148
76.3%
60.5/76.4
179/227
.698/.685

242/184
76%
75.5/95
224/282
.653/.639

274/205
74.8%
85.5/106
253/314
.591/.569

296/220
74.3%
92.4/114
274/337
.532/.509

228/173
76%
-
.409/.318

GM 5.3L Ported Absolute Speed Alum

N/A

2.02/1.60

N/A

142/116
81.7%

203/159
78.3%
63.3/79.1
188/234
.73/.722

256/196
76.6%
79.9/97.5
237/289
.691/.668

291/215
73.9%
90.8/107
269/317
.628/.586

314/228
72.6%
98/113
290/336
.565/.518

241/183
75.8%
-
.409/.324

GM 5.3L Ported Absolute Speed Alum

N/A

2.02/1.60

N/A

144/117
81.3%

204/157
77%
63.7/78.1
189/231
.734/.713

256/194
75.8%
79.9/96.5
237/286
.691/.661

293/218
74.4%
91.4/108
271/321
.632/.594

306/224
73.2%
95.5/111
283/330
.55/.509

241/182
75.6%
-
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM 5.3L Ported Texas Speed Alum

N/A

-
3.91

N/A

81/52
64.2%

150/114
76%

208/153
73.6%
-

256/183
71.5%
-

286/206
72%
-

285/221
77.5%
-

237/175
74%

GM 5.3L CNC FFHP Stage 2.5 SF600 Alum

229/84

2.055/1.60
3.905
1 3/4" Pipe

71/64
90.1%

148/119
80.4%

215/161
74.9%
64.8/80.1
192/237
.76/.731

256/199
77.7%
77.2/99
229/293
.679/.678

289/228
78.9%
87.1/113
258/336
.613/.621

311/235
75.6%
93.8/117
278/346
.55/.534

244/188
77.3%
1.36/2.80
.416/.324

GM 5.3L Ported Patriot Stage 3 SF1020 Alum

N/A

2.055/1.60
3.905

N/A

70/60
85.7%

149/113
75.8%

210/152
72.4%
63.3/75.6
188/224
.743/.69

251/189
75.3%
75.7/94
224/279
.666/.644

284/215
75.7%
85.6/107
254/317
.603/.586

302/230
76.2%
91.1/114
270/339
.534/.522

239/180
75.2%
-
.416/.324

GM LS1 806 NPS

N/A

2.00/1.55
4.016
No Pipe

N/A

66/55
83.3%

129/98
76%

182/129
70.9%
57.9/68.4
172/203
.661/.605

214/155
72.4%
68.1/82.1
202/243
.583/.545

225/167
74.2%
71.6/88.5
212/262
.491/.47

231/173
74.9%
73.5/91.7
218/272
.42/.406

236/177
75%
75.1/93.8
223/278
.368/.356

203/150
73.9%
-
.405/.314

GM LS1 5.3L 862 Ported ET Performance SF600 Alum

230/-

2.055/1.57
4.00
No Pipe

64-72

82/58
70.7%

162/115
71%

210/154
73.3%
63.3/79.5
188/236
.743/.713

265/187
70.6%
79.9/96.6
237/286
.703/.649

297/209
70.4%
89.5/108
265/320
.63/.58

320/222
69.4%
96.5/115
286/340
.566/.514

251/177
70.7%
1.39
.416/.318

GM LS1 5.3L 862 Ported ForceFed SF600 Alum

N/A

2.00/1.55

N/A

140/112
80%

202/157
77.7%
64.3/83.2
191/247
.734/.736

247/193
78.1%
78.6/102
233/303
.673/.679

282/221
78.4%
89.8/117
266/347
.615/.622

296/232
78.4%
94.2/123
279/364
.538/.544

233/183
78.4%
-
.405/.314

GM LS1 5.3L Ported TEA Stage 1.5 Alum

N/A

2.02/1.57

N/A

67/54
80.6%

140/122
87.1%

203/172
84.7%
63.3/88.8
188/263
.73/.796

251/218
86.9%
78.3/113
232/334
.677/.757

289/244
84.4%
90.2/126
267/373
.624/.678

314/260
82.8%
98/134
290/398
.565/.602

239/203
84.9%
-
.409/.318

GM LS1 5.3L Ported TEA Stage 2 Alum

N/A

2.02/1.57

N/A

67/57
85.1%

140/111
79.3%

208/169
81.3%
64.9/87.3
192/259
.748/.782

252/213
84.5%
78.6/110
233/326
.68/.739

290/241
83.1%
90.5/124
268/369
.626/.669

317/255
80.4%
98.9/132
293/390
.57/.59

241/198
81.9%
-
.409/.318

GM LS1 5.3L Ported TEA Stage 3 Alum

N/A

67/55
82.1%

143/115
80.4%

211/157
74.4%
-

257/201
78.2%
-

299/256
85.6%
-

326/276
84.7%
-

247/201
81.3%

GM LM7 5.3L Ported West Coast Stage 2 Alum

N/A

1.94/1.57

305/223
73.1%
103/115
306/341
.571/.516

-
-
-
.393/.318

GM LM7 5.3L Ported West Coast Stage 2 Alum

235/85

2.02/1.57

305/223
73.1%
95.2/115
282/341
.549/.516

-
-
1.30/2.62
.409/.318

GM LM7 LS 5.3l Ported Patriot Performance Stage I Alum

213/78

2.00/1.55

66.7

63/57
90.5%

128/103
80.5%

188/141
75%
59.8/74.7
177/221
.683/.661

234/176
75.2%
74.5/93.3
221/276
.638/.619

268/196
73.1%
85.3/104
253/308
.584/.551

289/212
73.4%
92/112
273/333
.525/.497

221/166
74.8%
1.36/2.72
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS1 5.3l / 5.7L Ported Patriot Performance Stage II OLD Alum

213/78

2.02/1.57

66.7

67/61
91%

133/108
81.2%

194/147
75.8%
60.5/75.9
179/225
.698/.68

242/183
75.6%
75.5/94.5
224/280
.653/.635

274/205
74.8%
85.5/106
253/314
.591/.569

296/220
74.3%
92.4/114
274/337
.532/.509

228/173
75.8%
1.39/2.82
.409/.318

GM LS1 5.3l / 5.7L Ported Patriot Performance Stage II Alum

220/67

2.02/1.57

63/67

67/61
91%

133/108
81.2%

194/147
75.8%
60.5/75.9
179/225
.698/.68

242/183
75.6%
75.5/94.5
224/280
.653/.635

274/205
74.8%
85.5/106
253/314
.591/.569

296/220
74.3%
92.4/114
274/337
.532/.509

228/173
75.8%
1.35/3.28
.409/.318

GM LS1 5.7L Ported TEA Stage 1 Alum

N/A

68/50
73.5%

138/105
76.1%

203/151
74.4%
-

243/191
78.6%
-

274/222
81%
-

292/245
83.9%
-

230/183
79.5%

GM LS1 5.7L Ported TEA Stage 1.5 Alum

N/A

2.02/1.57

N/A

68/52
76.5%

139/108
77.7%

200/160
80%
62.4/82.6
185/245
.72/.741

248/209
84.3%
77.4/108
229/320
.669/.726

283/237
83.7%
88.3/122
262/363
.611/.658

300/255
85%
93.6/132
277/390
.54/.59

234/194
82.8%
-
.409/.318

GM LS1 5.7L Ported West Coast Stage 2 Alum

N/A

2.02/1.57

293/223
76.1%
91.4/115
271/341
.527/.516

-
-
-
.409/.318

GM LS 5.3L 241 Weingartner Racing Alum

N/A

2.00/1.55
4.125
No Pipe

N/A

74/54
73%

156/106
67.9%

214/151
70.6%
68.1/80
202/237
.778/.708

252/176
69.8%
80.2/93.3
238/276
.687/.619

251/187
74.5%
79.9/99.1
237/294
.547/.526

256/191
74.6%
81.5/101
241/300
.465/.448

261/195
74.7%
83.1/103
246/306
.406/.392

232/168
72.4%
-
.405/.314

GM LS 5.3lL Ported PRC Stage 2.5 Alum

215/-

2.02/1.575
3.91
No Pipe

N/A

147/111
75.5%

206/145
70.4%
64.3/74.4
190/221
.741/.669

254/185
72.8%
79.3/95
235/281
.685/.64

291/204
70.1%
90.8/105
269/310
.628/.565

312/223
71.5%
97.4/114
288/339
.561/.514

242/174
71.7%
1.45
.409/.319

GM LS1 5.7L 241 Advanced Induction SF600 Alum

204/-

2.00/1.55
3.90
No Pipe

N/A

66/55
83.3%

139/101
72.7%

193/136
70.5%
61.4/72.1
182/214
.701/.638

215/160
74.4%
68.4/84.8
203/251
.586/.563

226/171
75.7%
71.9/90.6
213/269
.493/.481

233/180
77.3%
74.2/95.4
220/283
.423/.422

238/183
76.9%
75.8/97
224/287
.371/.368

207/155
74.8%
1.17
.405/.314

GM LS1 5.7L 241 Ported 219 Advanced Induction SF600 Alum

219/-

2.00/1.55
3.90
No Pipe

N/A

66/54
81.8%

143/101
70.6%

208/144
69.2%
66.2/76.3
196/226
.756/.675

251/174
69.3%
79.9/92.2
237/273
.684/.612

271/197
72.7%
86.3/104
256/309
.591/.554

285/209
73.3%
90.7/111
269/328
.518/.49

287/215
74.9%
91.4/114
271/338
.447/.432

241/173
72%
1.31
.405/.314

GM LS1 241 Ported Chad Speier Alum

N/A

2.02/1.57
4.00
1 7/8" Pipe

N/A

155/112
72.3%

219/155
70.8%
68.3/80.1
202/237
.788/.717

263/187
71.1%
82.1/96.6
243/286
.71/.649

278/211
75.9%
86.7/109
257/323
.60/.586

289/233
80.6%
90.2/120
267/357
.52/.539

295/244
82.7%
92.1/126
273/373
.455/.484

298/250
83.9%
93/129
276/383
.402/.434

301/253
84.1%
93.9/131
278/387
.361/.39

303/255
84.2%
94.5/132
280/390
.327/.354

267/211
79.1%
-
.409/.318

GM LS1 6.0L Ported AP Engineering Stage I Alum

N/A

2.02/1.575
3.970

N/A

66/62
93.9%

139/117
84.2%

213/161
75.6%
66.5/82.6
197/245
.766/.743

259/200
77.2%
80.8/103
239/304
.699/.692

283/219
77.4%
88.3/112
262/333
.611/.606

297/229
77.1%
92.7/118
275/348
.534/.528

305/243
79.7%
95.2/125
282/370
.47/.481

249/195
78.1%
-
.409/.319

GM LS1 6.0L Ported AP Engineering Alum

235/90

2.08/1.60
4.125
Pipe

N/A

75/63
84%

153/115
75.2%

217/163
75.1%
63.9/81.1
189/240
.758/.74

265/207
78.1%
78/103
231/305
.694/.705

310/243
78.4%
91.2/121
270/358
.65/.662

327/262
80.1%
96.2/130
285/386
.571/.595

328/272
82.9%
96.5/135
286/401
.491/.529

329/273
83%
96.8/136
287/402
.431/.465

276/219
79.6%
1.40/3.03
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS1 6.0L Ported ET Performance Alum

237/-

2.055/1.57
3.90

64-70

67/52
77.6%

138/112
81.2%

198/159
80.3%
59.7/82.1
177/243
.70/.736

249/182
73.1%
75.1/94
222/279
.66/.632

286/200
69.9%
86.2/103
255/306
.607/.555

311/210
67.5%
93.8/108
278/321
.55/.486

236/173
73%
1.31
.416/.318

GM LS2 243 Ported Greg Good 2 Alum

N/A

2.055/1.60
4.00

N/A

147/126
85.7%

225/171
76%
67.8/85
201/252
.796/.777

279/215
77.1%
84.1/107
249/317
.74/.732

321/237
73.8%
96.8/118
287/349
.681/.646

337/244
72.4%
102/121
301/360
.596/.554

262/199
75.9%
-
.416/.324

GM LS1/LS2 Ported PRC Alum

215/84

2.04/1.60
4.00
No Pipe

68/56
82.4%

145/115
79.3%

214/167
78%
65.5/83.1
194/246
.762/.759

271/202
74.5%
82.9/100
246/298
.724/.688

304/219
72%
93/109
276/323
.65/.597

318/238
74.8%
97.3/118
288/351
.566/.541

250/188
75.2%
1.48/2.83
.413/.324

GM LS1/LS2 Ported PRC Alum

237/85

2.10/1.60
4.03
No Pipe

66/57
86.4%

147/117
79.6%

225/170
75.6%
65/84.6
192/251
.779/.772

284/206
72.5%
82/102
243/304
.737/.702

325/227
69.8%
93.8/113
278/335
.675/.619

334/241
72.2%
96.4/120
286/355
.578/.547

263/192
73.1%
1.41/2.84
.425/.324

GM LS6

N/A

2.00/-

N/A

156/-

204/-
64.9
192
.741

243/-
77.3
229
.662

268/-
85.3
253
.584

278/-
88.5
262
.505

230
-
-
.405

GM LS6 SF600

N/A

2.00/1.55
3.90
1 7/8" Pipe

N/A

62/59
95.2%

126/108
85.7%

184/143
77.7%
58.6/75.8
174/225
.669/.67

224/163
72.8%
71.3/86.4
211/256
.61/.573

251/176
70.1%
79.9/93.3
237/276
.547/.495

257/183
71.2%
81.8/97
242/287
.467/.429

208/155
74.2%
-
.405/.314

GM LS6/LS2 243 / 799 Advanced Induction SF600 Alum

211/-

2.00/1.55
4.00
No Pipe

N/A

66/52
78.8%

139/110
79.1%

194/147
75.8%
61.8/77.9
183/231
.705/.689

236/167
70.8%
75.1/88.5
223/262
.643/.587

265/175
66%
84.4/92.7
250/275
.578/.492

260/183
70.4%
82.8/97
245/287
.472/.429

262/186
71%
83.4/98.6
247/292
.408/.374

226/161
71.4%
1.26
.405/.314

GM LS6/LS2 243 / 799 Ported 226 Advanced Induction SF600 Alum

226/-

2.00/1.55
4.00
No Pipe

N/A

66/53
80.3%

146/109
74.7%

215/144
67%
68.4/76.3
203/226
.781/.675

259/170
65.6%
82.4/90.1
244/267
.706/.598

290/197
67.9%
92.3/104
274/309
.632/.554

300/212
70.7%
95.5/112
283/333
.545/.497

301/221
73.4%
95.8/117
284/347
.469/.444

252/176
69.7%
1.33
.405/.314

GM LS6/LS2 243 / 799 Ported 232 Advanced Induction SF600 Alum

226/-

2.00/1.55
4.00
1 7/8" Pipe

N/A

69/53
76.8%

146/115
78.8%

214/157
73.4%
68.1/83.2
202/247
.778/.736

258/204
79.1%
82.1/108
243/320
.703/.717

293/256
87.4%
93.3/136
276/402
.639/.72

305/271
88.9%
97.1/144
288/426
.554/.635

315/277
87.9%
100/147
297/435
.491/.557

255/213
83.6%
1.39
.405/.314

GM LS6/LS2 243 / 799 Ported Flow Tech Induction Alum

N/A

2.00/1.55
3.90
1 3/4 Pipe

N/A

65/55
84.6%

146/120
82.2%

200/164
82%
63.7/86.9
189/258
.727/.769

248/192
77.4%
78.9/102
234/301
.676/.675

285/202
70.9%
90.7/107
269/317
.621/.568

303/209
69%
96.4/111
286/328
.551/.49

236/177
75%
-
.405/.314

GM LS6 243 / 317

210/75

2.00/1.55

64/71

236/185
78.4%
75.1/98
223/290
.429/.434

-
-
1.12/2.47
.405/.314

GM LS6 243 / 799 Ported PRC Stage 1 SF600 Alum

226.5/75

2.00/1.55

64.5

72/63
87.5%

142/121
85.2%

205/154
75.1%
65.3/81.6
193/242
.745/.722

255/191
74.9%
81.2/101
241/300
.695/.672

286/214
74.8%
91/113
270/336
.624/.602

305/220
72.1%
97.1/117
288/345
.554/.516

239/180
75.4%
-
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS6 243 / 799 Ported PRC Stage 2 SF600 Alum

238/75

2.02/1.57

64.5

75/66
88%

151/124
82.1%

209/160
76.6%
65.2/82.6
193/245
.752/.741

260/194
74.6%
81.1/100
240/297
.702/.674

293/217
74.1%
91.4/112
271/332
.632/.603

315/227
72.1%
98.3/117
291/347
.567/.525

246/184
75.1%
1.32/3.03
.409/.318

GM LS6 243 Ported West Coast Stage 2 Alum

233.3/86.3

2.02/1.57
4.03
Pipe

70/58
82.9%

142/119
83.8%

202/167
82.7%
63/86.3
187/256
.727/.773

246/206
83.7%
76.8/106
227/315
.664/.715

288/221
76.7%
89.9/114
266/338
.622/.614

312/234
75%
97.4/121
288/358
.561/.542

238/189
79.6%
-
.409/.318

GM LS6 243 CNC M2 Race Systems Alum

235/-

2.08/1.60
4.03

66/54
81.8%

141/114
80.9%

195/160
82.1%
57.4/79.6
170/236
.681/.727

252/190
75.4%
74.2/94.5
220/280
.66/.647

292/206
70.5%
85.9/102
255/304
.612/.561

319/215
67.4%
93.9/107
278/317
.557/.488

313/220
70.3%
92.1/109
273/324
.469/.428

252/184
73.1%
1.36
.421/.324

GM LS6 243 Out of Box Ported MTI Alum

N/A

2.02/1.57

N/A

70/53
75.7%

138/103
74.6%

201/144
71.6%
62.7/74.4
186/220
.723/.667

250/190
76%
78/98.1
231/291
.675/.66

285/214
75.1%
88.9/111
263/328
.615/.594

316/226
71.5%
98.6/117
292/346
.568/.523

312/230
73.7%
97.4/119
288/352
.481/.456

250/185
73.7%
-
.409/.318

GM LS6 243 NPS

N/A

2.00/1.55
-
No Pipe

N/A

62/54
87.1%

134/103
76.9%

191/131
68.6%
60.8/69.4
180/206
.694/.614

230/153
66.5%
73.2/81.1
217/240
.627/.538

252/165
65.5%
80.2/87.4
238/259
.549/.464

248/173
69.8%
78.9/91.7
234/272
.451/.406

248/-
78.9
234
.386

217/145
-
-
.405/.314

GM LS6 243 Ported NPS

N/A

2.00/1.55
-
No Pipe

N/A

65/53
81.5%

132/106
80.3%

200/148
74%
63.7/78.4
189/232
.727/.694

252/178
70.6%
80.2/94.3
238/280
.687/.626

285/194
68.1%
90.7/103
269/305
.621/.546

303/203
67%
96.4/108
286/319
.551/.476

296/208
70.3%
94.2/110
279/327
.461/.418

301/212
70.4%
95.8/112
284/333
.41/.373

253/178
70.6%
-
.405/.314

GM LS6 317 VJ Milled 0.030 Weingartner Racing Alum

N/A

2.00/1.55
4.125
No Pipe

N/A

92/69
75%

169/126
74.6%

225/159
70.7%
71.6/84.3
212/250
.818/.745

263/180
68.4%
83.7/95.4
248/283
.717/.633

267/188
70.4%
85/99.6
252/295
.582/.529

268/190
70.9%
85.3/101
253/298
.487/.445

238/169
70.7%
-
.405/.314

GM LS6 317 West Coast Alum

N/A

2.00/1.57
4.03
No Pipe

N/A

65/53
81.5%

142/112
78.9%

204/147
72.1%
64.9/75.9
192/225
.741/.68

233/165
70.8%
74.2/85.2
220/253
.635/.573

250/174
69.6%
79.6/89.9
236/266
.545/.483

253/184
72.7%
80.5/95
239/282
.46/.426

216/156
72.3%
-
.405/.318

GM LS6 317 Ported West Coast Stage 2 Alum

232.4/86.3

-
4.03
Pipe

73.5

70/59
84.3%

145/119
82.1%

210/174
82.9%
-

250/213
85.2%
-

288/228
79.2%
-

294/232
78.9%
-

237/193
81.4%

GM LS6 317 / LQ9 Ported Meaux Racing Alum

N/A

2.08/1.60

134/117
87.3%

212/172
81.1%
62.4/85.5
185/253
.741/.781

258/216
83.7%
75.9/107
225/318
.676/.736

286/231
80.8%
84.2/115
249/340
.60/.63

296/238
80.4%
87.1/118
258/351
.517/.541

302/241
79.8%
88.9/120
263/355
.452/.469

248/203
81.7%
-
.421/.324

GM LS6 317 Ported Bullet Cylinder Heads Alum

N/A

2.00/1.575

N/A

96/58
60.4%

141/109
77.3%

199/148
74.4%
63.3/76
188/225
.723/.683

241/175
72.6%
76.7/89.8
227/266
.657/.606

263/189
71.9%
83.7/97
248/287
.573/.523

282/210
74.5%
89.8/108
266/319
.512/.484

225/166
73.8%
-
.405/.319

GM LS6 CNC SDPC

N/A

2.00/1.55

N/A

67/50
74.6%

142/104
73.2%

210/150
71.4%
66.8/79.5
198/236
.763/.703

254/185
72.8%
80.9/98
240/290
.692/.651

290/203
70%
92.3/108
274/319
.632/.571

286/212
74.1%
91/112
270/333
.52/.497

236/171
72.3%
-
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS6 Ported Stage II ForceFed High Performance

N/A

2.02/1.60

59/64

73/69
94.5%

143/127
88.8%

205/161
78.5%
64/80.1
190/237
.738/.731

246/198
80.5%
76.8/98.5
227/292
.664/.675

282/223
79.1%
88/111
261/329
.609/.608

309/231
74.8%
96.4/115
286/340
.556/.525

237/188
79.3%
-
.409/.324

GM LS6 Ported TEA Stage 1 Alum

N/A

2.02/1.57
3.90
1 7/8" Pipe

N/A

64/47
73.4%

145/114
78.6%

215/166
77.2%
67.1/85.7
199/254
.774/.768

254/222
87.4%
79.3/115
235/340
.685/.771

293/244
83.3%
91.4/126
271/373
.632/.678

310/256
82.6%
96.7/132
287/392
.558/.592

243/200
82.3%
-
.409/.318

GM LS6 Ported TEA Stage 1.5 Alum

N/A

2.02/1.57

N/A

67/50
74.6%

139/119
85.6%

205/174
84.9%
64/89.9
190/266
.738/.805

254/224
88.2%
79.3/116
235/343
.685/.778

294/247
84%
91.7/128
272/378
.635/.686

320/257
80.3%
99.9/133
296/393
.576/.595

323/-
101
299
.498

256/204
-
-
.409/.318

GM LS6 Ported TEA Stage 1.5 Jasson Alum

N/A

2.02/1.57

N/A

281/258
91.8%
87.7/133
260/395
.607/.717

306/268
87.6%
95.5/138
283/410
.55/.62

294/263
89.6%
-
.409/.318

GM LS6 Ported TEA Stage 2 Alum

N/A

2.02/1.57
3.90

N/A

67/54
80.6%

139/120
86.3%

219/179
81.7%
68.3/92.5
202/274
.788/.829

271/224
82.7%
84.6/116
251/343
.731/.778

308/248
80.5%
96.1/128
285/380
.665/.689

320/260
81.3%
99.9/134
296/398
.576/.602

251/206
82%
-
.409/.318

GM LS6 Ported TEA Stage 2 HRM Alum

226/78

2.055/1.57
4.03

66/60
90.9%

144/118
81.9%

214/163
76.2%
64.5/84.2
191/249
.757/.755

269/199
74%
81.1/103
240/305
.713/.691

310/223
71.9%
93.5/115
277/341
.658/.619

329/235
71.4%
99.2/121
294/360
.582/.544

310/231
74.5%
93.5/119
277/354
.47/.458

263/195
74.2%
1.46/3.01
.416/.318

GM LS6 Ported TEA Stage 2.5 Out of Box SF600 Alum

253/-

2.02/1.57

N/A

73/59
80.8%

140/121
86.4%

205/175
85.4%
64/90.4
190/268
.738/.81

256/228
89.1%
79.9/118
237/349
.691/.792

295/264
89.5%
92.1/136
273/404
.637/.733

322/278
86.3%
100/144
298/425
.579/.643

337/-
105
312
.52

259/213
-
1.33
.409/.318

GM LS6 Ported TEA Stage 3 Alum

N/A

73/52
71.2%

148/126
85.1%

219/182
83.1%
-

269/233
86.6%
-

311/260
83.6%
-

346/270
78%
-

259/214
82.8%

GM LS6 Ported Katech Alum

240/88

2.10/1.55

N/A

75/51
68%

153/127
83%

218/167
76.6%
62.9/88.5
186/262
.754/.783

267/207
77.5%
77.1/110
228/325
.693/.728

306/221
72.2%
88.3/117
262/347
.635/.622

330/230
69.7%
95.3/122
282/361
.571/.539

255/190
74.7%
1.38/2.61
.425/.314

GM LS6 Ported Patriot Alum

N/A

2.02/1.57

59/64

72/65
90.3%

140/124
88.6%

202/160
79.2%
63/82.6
187/245
.727/.741

244/196
80.3%
76.1/101
226/300
.658/.68

280/220
78.6%
87.4/114
259/337
.604/.611

304/220
72.4%
94.9/114
281/337
.547/.509

234/184
78.6%
-
.409/.318

GM LS6 Ported Patriot - Demirjian Alum

235/85

2.05/1.60
3.90
1 3/4 Pipe

65/54
83.1%

135/102
75.6%

192/163
84.9%
58.2/81.1
172/240
.681/.74

238/169
71%
72.1/84.1
214/249
.633/.576

273/181
66.3%
82.7/90
245/267
.581/.493

294/188
63.9%
89.1/93.5
264/277
.521/.427

226/161
70.9%
1.25/2.21
.415/.324

GM LS6 Ported Stage 3 Precision Porting Alum

220/80

2.05/1.57

91/67
73.6%

164/107
65.2%

224/161
71.9%
67.9/83.2
201/246
.794/.745

270/192
71.1%
81.8/99.2
242/294
.718/.667

305/219
71.8%
92.4/113
274/335
.649/.608

298/233
78.2%
90.3/120
268/357
.528/.539

252/182
72.3%
1.39/2.91
.415/.318

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS6 Ported ET Performance Alum

234/-

2.02/1.57
4.155

N/A

66/55
83.3%

146/120
82.2%

198/163
82.3%
61.8/84.2
183/249
.712/.755

245/188
76.7%
76.4/97.1
227/288
.661/.653

282/200
70.9%
88/103
261/306
.609/.555

305/208
68.2%
95.2/107
282/318
.549/.481

235/176
74.7%
1.30
.409/.318

GM LS6 Ported ET Performance 234 Alum

234/-

2.055/1.57
3.90

N/A

71/57
80.3%

137/106
77.4%

203/145
71.4%
61.2/74.9
181/222
.718/.671

252/190
75.4%
76/98.1
225/291
.668/.66

285/203
71.2%
85.9/105
255/311
.605/.564

305/210
68.9%
92/108
272/321
.539/.486

236/171
72.3%
1.30
.416/.318

GM LS6 Ported ET Performance 237 Alum

237/-

2.08/1.57
4.155

N/A

68/56
82.4%

151/119
78.8%

207/168
81.2%
60.9/86.8
181/257
.723/.778

260/205
78.8%
76.5/106
227/314
.681/.712

301/223
74.1%
88.6/115
262/341
.631/.619

326/228
69.9%
95.9/118
284/349
.57/.528

249/189
75.7%
1.38
.421/.318

GM LS6 Ported Texas Speed 237 Alum

237/-

2.04/1.57

N/A

151/124
82.1%

209/160
76.6%
63.9/82.6
189/245
.745/.741

260/194
74.6%
79.5/100
236/297
.695/.674

293/217
74.1%
89.6/112
266/332
.626/.603

315/227
72.1%
96.4/117
286/347
.561/.525

246/184
75.1%
1.33
.413/.318

GM LS7 Ported Alum CCM

270/84

2.20/1.61
4.03

71/60
84.5%

145/120
82.8%

222/159
71.6%
58.4/78.1
173/231
.733/.718

271/192
70.8%
71.3/94.3
211/279
.671/.65

315/207
65.7%
82.9/102
246/301
.624/.561

348/219
62.9%
91.5/108
271/319
.575/.494

352/221
62.8%
92.6/109
274/322
.498/.428

276/186
67.6%
1.30/2.63
.446/.326

GM LS7 Ported ET Performance Alum

250/-

2.125/1.60
4.00

35-72

73/56
76.7%

154/110
71.4%

236/166
70.3%
66.5/82.6
197/245
.807/.754

287/199
69.3%
80.9/99
240/293
.736/.678

321/214
66.7%
90.5/106
268/315
.659/.583

345/222
64.3%
97.3/110
288/327
.59/.504

269/182
67.8%
1.38
.430/.324

GM LS7 CNC Lingenfelter Alum

275/84

2.205/1.615
-
No Pipe

174/120
69%

256/164
64.1%
67/80.1
199/237
.844/.738

312/200
64.1%
81.7/97.6
242/289
.771/.675

352/222
63.1%
92.2/108
273/321
.696/.599

384/234
60.9%
101/114
298/338
.633/.526

396/242
61.1%
104/118
307/350
.559/.467

312/197
63.1%
1.44/2.88
.447/.327

GM LS7 CNC Lingenfelter Alum

N/A

2.205/1.615
-
Pipe

174/127
73%

256/180
70.3%
67/87.9
199/260
.844/.81

312/217
69.6%
81.7/106
242/314
.771/.732

352/240
68.2%
92.2/117
273/347
.696/.648

384/260
67.7%
101/127
298/376
.633/.585

396/273
68.9%
104/133
307/395
.559/.526

312/216
69.2%
-
.447/.327

GM LS Greg Good 245 Alum

N/A

2.125/1.60
4.03
No Pipe

N/A

148/117
79.1%

228/160
70.2%
64.3/79.6
190/236
.78/.727

301/196
65.1%
84.9/97.5
251/289
.772/.668

339/247
72.9%
95.6/123
283/364
.696/.673

354/263
74.3%
99.8/131
296/388
.605/.597

355/272
76.6%
100/135
297/401
.52/.529

288/209
72.8%
-
.430/.324

GM LS7 8452 12 Deg West Coast SF600 Alum

259/86

2.20/1.61
4.155
No Pipe

163/115
70.6%

245/168
68.6%
64.5/82.5
191/245
.809/.758

306/206
67.3%
80.5/101
239/300
.758/.697

344/218
63.4%
90.5/107
268/317
.682/.59

370/226
61.1%
97.3/111
288/329
.611/.51

336/229
68.2%
88.4/112
262/333
.476/.443

294/194
65.9%
1.43/2.66
.446/.326

GM LS7 CNC West Coast Alum

267/99

2.205/1.625
4.155
No Pipe

N/A

81/58
71.6%

161/108
67.1%

250/163
65.2%
65.5/78.6
194/233
.824/.729

276/205
74.3%
72.3/98.8
214/293
.682/.688

357/232
65%
93.5/112
277/331
.706/.623

389/245
63%
102/118
302/350
.641/.548

380/251
66.1%
99.5/121
295/359
.537/.481

302/201
66.4%
1.46/2.54
.447/.329

GM LS7 Ported PRC SF600 Alum

285/-

2.25/1.61
4.125

169/119
70.4%

248/179
72.2%
62.4/87.9
185/261
.801/.808

311/211
67.8%
78.2/104
232/307
.753/.714

353/234
66.3%
88.8/115
263/341
.684/.634

386/235
60.9%
97.1/115
288/342
.623/.53

407/246
60.4%
102/121
303/358
.563/.476

312/204
65.3%
1.43
.456/.326

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

GM LS7 7.0l HRM Alum

240/-

2.10/1.60
-
No Pipe

N/A

161/113
70.2%

245/172
70.2%
70.7/85.5
210/253
.848/.781

307/200
65.1%
88.6/99.5
263/295
.797/.681

346/211
61%
99.9/105
296/311
.718/.575

374/219
58.6%
108/109
320/323
.647/.497

347/224
64.6%
100/111
297/330
.515/.436

344/228
66.3%
99.3/113
294/336
.446/.388

303/195
64.4%
1.56
.425/.324

GM LS7 CNC SDPC

283/86

2.20/1.61

70/58
82.9%

159/111
69.8%

237/157
66.2%
62.3/77.1
185/228
.783/.709

301/199
66.1%
79.2/97.7
235/290
.746/.674

349/220
63%
91.8/108
272/320
.692/.596

378/229
60.6%
99.4/112
295/333
.624/.517

389/238
61.2%
102/117
303/346
.551/.46

302/192
63.7%
1.37/2.77
.446/.326

GM LQ9 Ported Patriot Stage 2 Alum

N/A

2.055/1.57

70/66
94.3%

138/122
88.4%

200/162
81%
60.3/83.7
179/248
.707/.75

241/203
84.2%
72.7/105
215/311
.639/.705

277/227
81.9%
83.5/117
247/347
.588/.63

304/235
77.3%
91.7/121
272/360
.538/.544

232/190
81.8%
-
.416/.318

GM LQ9 Ported Patriot Stage 3 Alum

225/83

2.08/1.60
4.125

76/66
86.8%

145/122
84.1%

207/163
78.7%
60.9/81.1
181/240
.723/.74

254/205
80.7%
74.8/102
221/302
.666/.698

295/229
77.6%
86.8/114
257/337
.618/.624

320/236
73.8%
94.2/117
279/348
.559/.536

244/191
78.2%
1.42/2.84
.421/.324

GM LQ9 / LS6 / LS2 Ported Patriot Stage 2 Alum

227/70

2.055/1.57

72/66
91.7%

140/124
88.6%

202/160
79.2%
60.9/82.6
180/245
.714/.741

246/199
80.9%
74.2/103
220/305
.652/.691

280/220
78.6%
84.4/114
250/337
.594/.611

304/229
75.3%
91.7/118
272/350
.538/.53

234/186
79.5%
1.34/3.27
.416/.318

GM LQ9 / LS6 / LS2 Ported Patriot Stage 3 Alum

227/70

2.08/1.60

75/66
88%

147/124
84.4%

209/164
78.5%
61.5/81.6
182/242
.73/.745

255/206
80.8%
75/102
222/304
.668/.702

297/229
77.1%
87.4/114
259/337
.623/.624

320/235
73.4%
94.2/117
279/346
.559/.534

246/192
78%
1.41/3.36
.421/.324

GM LS Ported ET Performance 245 SF600 Alum

245/-

2.10/1.57
4.00
No Pipe

N/A

73/57
78.1%

152/114
75%

209/164
78.5%
60.3/84.7
179/251
.723/.759

266/204
76.7%
76.8/105
228/312
.69/.708

312/224
71.8%
90.1/116
267/343
.648/.622

338/231
68.3%
97.6/119
289/354
.585/.535

320/236
73.8%
92.4/122
274/361
.475/.468

266/196
73.5%
1.38
.425/.318

GM LS Ported ET Performance 245 Redone I-45 E-50 SF600 Alum

245/-

2.125/1.55
4.03

149/-

225/-
63.4
188
.769

281/-
79.2
235
.721

325/-
91.6
272
.667

354/-
99.8
296
.605

344/-
97
287
.504

280
-
1.44
.430/.314

GM LS Ported ET Performance 255 SF600 Alum

255/-

2.10/1.57
4.00
No Pipe

N/A

71/55
77.5%

147/113
76.9%

227/159
70%
65.5/82.1
194/243
.786/.736

285/213
74.7%
82.3/110
244/326
.74/.739

324/229
70.7%
93.5/118
277/350
.673/.636

349/236
67.6%
101/122
299/361
.604/.546

360/242
67.2%
104/125
308/370
.534/.48

282/199
70.4%
1.41
.425/.318

GM LS Ported ET Performance 265 SF600 Alum

265/-

2.10/1.57
4.00
No Pipe

N/A

73/55
75.3%

155/113
72.9%

212/159
75%
61.2/82.1
181/243
.734/.736

271/213
78.6%
78.2/110
232/326
.703/.739

323/229
70.9%
93.3/118
276/350
.671/.636

352/236
67%
102/122
301/361
.609/.546

373/242
64.9%
108/125
319/370
.553/.48

281/199
70.7%
1.41
.425/.318

GM LS98/76 Ported Bullet Cylinder Heads Alum

N/A1

2.00/1.575

N/A

82/66
80.5%

162/114
70.4%

233/151
64.8%
74.2/77.5
220/230
.847/.697

282/179
63.5%
89.8/91.9
266/272
.769/.619

319/198
62.1%
102/102
301/301
.695/.548

344/212
61.6%
109/109
324/322
.625/.489

358/223
62.3%
114/114
338/339
.558/.441

283/180
63.4%
-
.405/.319

Chevy L92 Alum CCM

260/90

2.16/1.59
4.03

72/63
87.5%

148/126
85.1%

212/162
76.4%
57.9/81.6
171/242
.713/.74

264/189
71.6%
72/95.2
213/282
.666/.648

302/205
67.9%
82.4/103
244/306
.61/.562

322/214
66.5%
87.9/108
260/319
.542/.489

316/221
69.9%
86.2/111
256/330
.456/.433

261/186
71.4%
1.24/2.46
.437/.322

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy L92 Livernois Motorsports Alum

N/A

2.16/1.59
4.125

N/A

79/58
73.4%

153/114
74.5%

225/147
65.3%
61.4/74
182/219
.757/.672

276/170
61.6%
75.3/85.6
223/254
.696/.583

310/183
59%
84.6/92.2
251/273
.626/.502

332/189
56.9%
90.6/95.2
268/282
.559/.432

330/193
58.5%
90.1/97.2
267/288
.476/.378

317/196
61.8%
86.5/98.7
256/292
.40/.336

278/170
61.3%
-
.437/.322

Chevy L92 Weingartner Racing Brez Alum

N/A

2.16/1.59
4.155
No Pipe

N/A

66/56
84.8%

153/114
74.5%

221/160
72.4%
60.3/80.6
179/239
.744/.731

309/189
61.2%
84.3/95.2
250/282
.78/.648

330/203
61.5%
90.1/102
267/303
.666/.557

325/211
64.9%
88.7/106
263/315
.547/.482

332/214
64.5%
90.6/108
268/319
.479/.419

278/182
65.3%
-
.437/.322

Chevy L92 Ported Head Shop Alum

N/A

2.16/1.59

N/A

158/114
72.2%

221/160
72.4%
60.3/80.6
179/239
.744/.731

280/199
71.1%
76.4/100
226/297
.707/.682

312/226
72.4%
85.1/114
252/337
.63/.62

337/244
72.4%
92/123
272/364
.567/.558

346/250
72.3%
94.4/126
280/373
.499/.49

276/199
72.1%
-
.437/.322

Chevy L92 West Coast Alum

261/90

2.16/1.59
4.03
2 1/2 Pipe

69.8

75/64
85.3%

154/126
81.8%

225/162
72%
61.4/81.6
182/242
.757/.74

275/190
69.1%
75/95.7
222/284
.694/.651

309/205
66.3%
84.3/103
250/306
.624/.562

329/215
65.3%
89.8/108
266/321
.553/.491

310/221
71.3%
84.6/111
251/330
.447/.433

267/187
69.9%
1.26/2.46
.437/.322

Chevy L92 West Coast Alum

261/90

2.16/1.59
4.155
No Pipe

69.8

74/63
85.1%

153/121
79.1%

225/157
69.8%
61.4/79.1
182/234
.757/.718

277/176
63.5%
75.6/88.6
224/263
.699/.603

313/188
60.1%
85.4/94.7
253/281
.632/.516

336/194
57.7%
91.7/97.7
272/289
.565/.443

327/198
60.6%
89.2/99.7
264/295
.472/.388

272/172
63.4%
1.29/2.20
.437/.322

Chevy L92 CNC West Coast Stage 2 Alum

268/99

-
4.03
No Pipe

75/63
84%

160/117
73.1%

224/182
81.3%
-

275/213
77.5%
-

308/232
75.3%
-

344/243
70.6%
-

355/248
69.9%
-

278/206
74.1%
1.32/2.51

Chevy L92 CNC West Coast Stage 2 Alum

268/99

-
4.155
No Pipe

75/65
86.7%

160/116
72.5%

227/180
79.3%
-

280/219
78.2%
-

323/240
74.3%
-

354/248
70.1%
-

364/253
69.5%
-

285/209
73.5%
1.36/2.56

Chevy L92 CNC West Coast Stage 3 Alum

N/A

2.20/-
4.155

N/A

79/-

161/-

236/-
62.1
184
.78

293/-
77.1
228
.726

336/-
88.4
262
.666

365/-
96
285
.603

380/-
100
296
.538

295
-
-
.446

Chevy L92 CNC West Coast Stage 3 Alum

280/99

2.20/1.60

79/57
72.2%

161/118
73.3%

237/182
76.8%
62.3/90.5
185/268
.783/.827

293/222
75.8%
77.1/110
228/327
.726/.756

336/240
71.4%
88.4/119
262/354
.666/.654

365/249
68.2%
96/124
285/367
.603/.565

375/254
67.7%
98.6/126
292/374
.531/.494

295/211
71.6%
1.34/2.57
.446/.324

Chevy L92 CNC West Coast HRM Alum

280/97

2.20/1.60

71/60
84.5%

159/116
73%

227/174
76.7%
59.7/86.5
177/256
.75/.79

270/218
80.7%
71/108
210/321
.669/.743

320/234
73.1%
84.2/116
249/345
.634/.638

349/247
70.8%
91.8/123
272/364
.576/.561

361/253
70.1%
95/126
281/373
.511/.492

281/207
73.7%
1.29/2.61
.446/.324

Chevy L92 Lingenfelter Alum

261/89

2.165/1.59

N/A

152/117
77%

222/155
69.8%
60.3/78.1
179/231
.745/.708

272/180
66.2%
73.9/90.7
219/269
.685/.617

306/191
62.4%
83.1/96.2
246/285
.616/.524

328/199
60.7%
89.1/100
264/297
.551/.455

304/202
66.4%
82.6/102
245/301
.437/.396

264/174
65.9%
1.26/2.27
.438/.322

Chevy L92 CNC Competition CNC Alum

266/93

2.165/1.59

68.5

76/58
76.3%

161/117
72.7%

229/171
74.7%
62.2/86.1
184/255
.769/.782

282/210
74.5%
76.6/106
227/313
.71/.72

323/230
71.2%
87.7/116
260/343
.651/.631

343/240
70%
93.2/121
276/358
.576/.548

353/245
69.4%
95.9/123
284/366
.508/.48

282/202
71.7%
1.33/2.63
.438/.322

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy L92 / LS3 821 Alum HRM

260/90

2.165/1.59

67/59
88.1%

147/116
78.9%

211/157
74.4%
57.3/79.1
170/234
.708/.718

259/188
72.6%
70.4/94.7
208/281
.652/.644

297/207
69.7%
80.7/104
239/309
.598/.568

312/216
69.2%
84.8/109
251/322
.524/.494

314/223
71%
85.3/112
253/333
.452/.437

257/185
71.9%
1.21/2.48
.438/.322

Chevy L92 / L76 CNC GMPP CCM Alum

280/100

2.16/1.59
4.065

N/A

150/105
70%

222/140
63.1%
60.6/70.5
180/209
.747/.64

260/168
64.6%
71/84.6
210/251
.656/.576

298/190
63.8%
81.3/95.7
241/284
.602/.521

332/201
60.5%
90.6/101
268/300
.559/.459

252/161
63.7%
1.19/2.01
.437/.322

Chevy L92 364 CNC GMPP HRM Alum

279/95

2.165/1.59

71/61
85.9%

150/110
73.3%

226/154
68.1%
61.4/77.6
182/230
.759/.704

273/184
67.4%
74.2/92.7
220/275
.687/.631

313/206
65.8%
85/104
252/307
.63/.565

341/219
64.2%
92.6/110
274/327
.572/.50

261/175
67%
1.22/2.31
.438/.322

Chevy L92 / LS3 Lingenfelter Alum

261/89

2.165/1.59

N/A

156/120
76.9%

226/158
69.9%
61.4/79.6
182/236
.759/.722

276/183
66.3%
75/92.2
222/273
.695/.627

310/194
62.6%
84.2/97.7
250/289
.624/.532

332/202
60.8%
90.2/102
267/301
.557/.462

308/205
66.6%
83.7/103
248/306
.443/.402

268/177
66%
1.27/2.30
.438/.322

Chevy L92 / LS3 CNC Lingenfelter Alum

275/93

2.165/1.59
4.065

N/A

156/116
74.4%

228/160
70.2%
61.9/80.6
184/239
.765/.731

280/199
71.1%
76.1/100
225/297
.705/.682

320/218
68.1%
86.9/110
258/325
.644/.598

346/229
66.2%
94/115
278/342
.581/.523

340/235
69.1%
92.4/118
274/351
.489/.46

278/193
69.3%
1.26/2.53
.438/.322

Chevy L92 / LS3 CNC Lingenfelter Alum

275/93

2.165/1.59
4.125

N/A

158/116
73.4%

230/161
70%
62.5/81.1
185/240
.772/.736

282/201
71.3%
76.6/101
227/300
.71/.689

322/220
68.3%
87.5/111
259/328
.649/.603

350/231
66%
95.1/116
282/345
.587/.528

344/237
68.9%
93.4/119
277/354
.495/.464

281/194
69.2%
1.27/2.55
.438/.322

Chevy L92 / LS3 823 CNC Lingenfelter HRM Alum

271/93

2.165/1.59

67/54
80.6%

141/112
79.4%

207/173
83.6%
56.2/87.1
167/258
.695/.791

261/217
83.1%
70.9/109
210/324
.657/.744

303/238
78.5%
82.3/120
244/355
.61/.653

341/252
73.9%
92.6/127
274/376
.572/.576

360/254
70.6%
97.8/128
290/379
.518/.498

269/208
77.2%
1.33/2.73
.438/.322

Chevy L92 / LS3 Ported TEA Stage 2 Alum

N/A

2.165/1.59

N/A

71/55
77.5%

155/118
76.1%

240/190
79.2%
65.2/95.7
193/284
.806/.868

302/253
83.8%
82/127
243/378
.76/.867

344/273
79.4%
93.4/137
277/407
.693/.749

360/284
78.9%
97.8/143
290/424
.604/.649

280/224
79.8%
-
.438/.322

Chevy L92 / LS3 823 Ported TEA HRM Alum

279/91

2.165/1.59

70/57
81.4%

144/110
76.4%

226/153
67.7%
61.4/77.1
182/228
.759/.699

285/191
67%
77.4/96.2
229/285
.718/.655

326/219
67.2%
88.6/110
262/327
.657/.601

350/232
66.3%
95.1/117
282/346
.587/.53

365/241
66%
99.1/121
294/360
.525/.472

283/191
67.6%
1.31/2.65
.438/.322

Chevy L92 / LS3 Ported Head Shop Alum

N/A

2.165/1.59

N/A

221/160
72.4%
60/80.6
178/239
.742/.731

280/199
71.1%
76.1/100
225/297
.705/.682

312/226
72.4%
84.8/114
251/337
.628/.62

337/244
72.4%
91.5/123
271/364
.566/.558

346/250
72.3%
94/126
278/373
.498/.49

299/216
72.1%
-
.438/.322

Chevy L92 / LS3 Advanced Induction SF600 Alum

260/-

2.165/1.59
4.03
No Pipe

N/A

80/58
72.5%

152/118
77.6%

219/157
71.7%
59.5/79.1
176/234
.735/.718

261/183
70.1%
70.9/92.2
210/273
.657/.627

280/195
69.6%
76.1/98.2
225/291
.564/.535

306/202
66%
83.1/102
246/301
.514/.462

308/207
67.2%
83.7/104
248/309
.443/.405

254/177
69.6%
1.18
.438/.322

Chevy L92 / LS3 Ported 267 Advanced Induction SF600 Alum

267/-

2.165/1.59
4.03
No Pipe

N/A

75/55
73.3%

155/109
70.3%

233/150
64.4%
63.3/75.5
188/224
.782/.686

292/182
62.3%
79.3/91.7
235/272
.735/.624

329/204
62%
89.4/103
265/304
.663/.559

349/217
62.2%
94.8/109
281/324
.586/.496

364/227
62.4%
98.9/114
293/339
.524/.445

287/182
63.2%
1.36
.438/.322

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy L92 / LS3 Ported PRC Alum

N/A

2.165/1.59

N/A

154/117
76%

223/179
80.3%
60.6/90.2
179/267
.749/.818

282/202
71.6%
76.6/102
227/301
.71/.692

323/219
67.8%
87.7/110
260/327
.651/.601

349/232
66.5%
94.8/117
281/346
.586/.53

266/190
71.3%
-
.438/.322

Chevy L92 / LS3 Ported LME Alum

N/A

2.165/1.60
4.07
No Pipe

N/A

82/73
89%

157/124
79%

242/171
70.7%
65.7/85
195/252
.812/.777

292/206
70.5%
79.3/102
235/304
.735/.702

345/232
67.2%
93.7/115
278/342
.695/.632

367/239
65.1%
99.7/119
295/352
.616/.543

281/194
69.3%
-
.438/.324

Chevy L92 364 / 716 CNC SD8760 / SD8800 Alum

279/99

2.165/1.59
4.155

69/46
66.7%

154/100
64.9%

222/136
61.3%
60.3/68.5
179/203
.745/.622

266/166
62.4%
72.3/83.6
214/248
.67/.569

309/189
61.2%
83.9/95.2
249/282
.622/.518

345/189
54.8%
93.7/95.2
278/282
.579/.432

358/209
58.4%
97.2/105
288/312
.515/.409

276/165
59.8%
1.28/2.11
.438/.322

Chevy L92 Ported TEA Alum

N/A

2.165/1.59
4.03

N/A

67/53
79.1%

150/118
78.7%

226/173
76.5%
61.4/87.1
182/258
.759/.791

287/219
76.3%
78/110
231/327
.723/.751

332/247
74.4%
90.2/124
267/369
.669/.677

353/264
74.8%
95.9/133
284/394
.592/.603

368/266
72.3%
100/134
296/397
.529/.521

286/215
75%
-
.438/.322

Chevy LS3 Darin Morgin Alum

N/A

2.165/1.60

N/A

158/-

224/-
60.8
180
.752

273/-
74.2
220
.687

305/-
82.9
245
.614

309/-
83.9
249
.519

300/-
81.5
241
.432

309/-
83.9
249
.389

316/-
85.8
254
.354

274
-
-
.438/.324

Chevy LS3 Ported Darin Morgin I-45 T-90% Alum

N/A

2.165/1.60

N/A

159/-

229/-
62.2
184
.769

282/-
76.6
227
.71

320/-
86.9
258
.644

338/-
91.8
272
.567

343/-
93.2
276
.493

349/-
94.8
281
.439

356/-
96.7
287
.398

297
-
-
.438/.324

Chevy LS3 Ported Darin Morgan / Chad Speier I-45 E-45 Alum

265/-

2.165/1.60
4.06

N/A

141/111
78.7%

219/146
66.7%
59.5/72.6
176/215
.735/.663

281/175
62.3%
76.3/87
226/258
.707/.596

322/205
63.7%
87.5/102
259/302
.649/.559

349/220
63%
94.8/109
281/324
.586/.50

355/225
63.4%
96.4/112
286/332
.511/.438

367/230
62.7%
99.7/114
295/339
.462/.392

291/187
64.5%
1.38
.438/.324

Chevy LS3 Ported Smithberg Racing Alum

N/A

2.165/1.59
4.07
No Pipe

N/A

71/41
57.7%

151/104
68.9%

233/153
65.7%
63.3/77.1
188/228
.782/.699

295/192
65.1%
80.1/96.7
237/287
.743/.658

335/216
64.5%
91/109
270/322
.675/.592

358/227
63.4%
97.2/114
288/339
.601/.519

274/178
65%
-
.438/.322

Chevy LS99 Ported Mike / New Era Performance Alum

N/A

2.165/1.60

N/A

157/-

233/-
63.3
188
.782

300/-
81.5
241
.755

318/-
86.4
256
.64

340/-
92.4
274
.571

345/-
93.7
278
.496

355/-
96.4
286
.447

363/-
98.6
292
.406

301
-
-
.438/.324

Chevy LS9 West Coast Alum

N/A

2.16/1.60
4.155

N/A

75/60
80%

156/116
74.4%

216/160
74.1%
58.9/79.6
175/236
.727/.727

265/188
70.9%
72.3/93.5
214/277
.669/.64

291/205
70.4%
79.4/102
235/302
.587/.559

280/210
75%
76.4/104
226/309
.471/.477

284/215
75.7%
77.5/107
230/317
.41/.419

249/182
73.3%
-
.437/.324

Chevy LS9 Ported West Coast Alum

N/A

2.16/1.60
4.155

N/A

75/55
73.3%

154/113
73.4%

223/172
77.1%
60.9/85.5
180/253
.75/.781

274/216
78.8%
74.8/107
222/318
.691/.736

318/234
73.6%
86.8/116
257/345
.642/.638

351/242
68.9%
95.8/120
284/357
.59/.55

357/246
68.9%
97.4/122
289/363
.515/.479

280/204
72.9%
-
.437/.324

AFR LS1 Street SF600 Alum

205/78

2.02/1.60
3.90
1 7/8" Pipe

66/76

140/112
80%

200/170
85%
62.4/84.6
185/251
.72/.772

251/203
80.9%
78.3/101
232/299
.677/.692

281/221
78.6%
87.7/110
260/326
.607/.602

298/230
77.2%
93/114
276/339
.536/.522

234/187
80%
1.45/2.95
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR LS1 Street SF600 Out of Box Alum

205/-

2.02/1.60
3.90
1 7/8" Pipe

N/A

144/116
80.6%

208/170
81.7%
64.9/84.6
192/251
.748/.772

255/206
80.8%
79.6/102
236/304
.688/.702

287/221
77%
89.6/110
265/326
.62/.602

302/232
76.8%
94.2/115
279/342
.543/.527

239/189
79%
1.47
.409/.324

AFR LS1 Street Chamber Wall opened to 4" Alum

205/78

2.02/1.60
4.00
1 7/8" Pipe

158/122
77.2%

220/170
77.3%
68.6/84.6
203/251
.791/.772

264/217
82.2%
82.4/108
244/320
.712/.739

285/232
81.4%
88.9/115
263/342
.615/.632

300/241
80.3%
93.6/120
277/355
.54/.547

245/196
80%
1.46/3.09
.409/.324

AFR LS1 Street Chamber Work / Mild Port Work Alum

205/78

2.02/1.60
-
1 7/8" Pipe

N/A

151/129
85.4%

220/190
86.4%
68.6/94.5
203/280
.791/.863

266/228
85.7%
83/113
246/336
.718/.777

293/242
82.6%
91.4/120
271/357
.632/.66

301/248
82.4%
93.9/123
278/365
.541/.563

246/207
84.2%
1.47/3.18
.409/.324

AFR LS1 210 Mongoose Street V2 Alum

210/84

2.02/1.60
3.90
1 7/8" Pipe

N/A

153/124
81%

214/178
83.2%
66.8/88.5
198/262
.77/.808

262/214
81.7%
81.8/106
242/315
.707/.729

293/237
80.9%
91.4/118
271/349
.632/.646

302/237
78.5%
94.2/118
279/349
.543/.538

245/198
80.9%
1.44/2.82
.409/.324

AFR LS1 Street 215 SF600 Alum

215/84

2.02/1.60
-
1 7/8" Pipe

N/A

152/119
78.3%

218/180
82.6%
68/89.5
202/265
.784/.818

264/234
88.6%
82.4/116
244/345
.712/.797

295/234
79.3%
92.1/116
273/345
.637/.638

314/245
78%
98/122
290/361
.565/.556

249/202
81.4%
1.46/2.92
.409/.324

AFR LS1 215 Mongoose Strip V2 Alum

215/84

2.02/1.60
4.06
1 7/8" Pipe

N/A

154/132
85.7%

219/180
82.2%
68.3/89.5
202/265
.788/.818

264/221
83.7%
82.4/110
244/326
.712/.753

297/239
80.5%
92.7/119
275/352
.641/.651

312/246
78.8%
97.4/122
288/363
.561/.559

249/204
81.7%
1.45/2.93
.409/.324

AFR LS1 Street 225 Small Bore Old SF600 Alum

225/85

2.08/1.60
3.90
1 7/8" Pipe

66/76

141/116
82.3%

205/171
83.4%
60.3/85
179/252
.716/.777

252/204
81%
74.2/101
220/301
.66/.695

287/222
77.4%
84.5/110
250/327
.602/.605

310/232
74.8%
91.2/115
270/342
.542/.527

239/189
79.1%
1.38/2.73
.421/.324

AFR LS1 Street 225 Small Bore SF600 Alum

225/85

2.08/1.60
3.90
1 7/8" Pipe

66/76

142/118
83.1%

205/175
85.4%
60.3/87
179/258
.716/.795

254/209
82.3%
74.8/104
221/308
.666/.712

288/225
78.1%
84.8/112
251/332
.604/.613

312/237
76%
91.8/118
272/349
.545/.538

240/193
80.3%
1.39/2.79
.421/.324

AFR LS1 Street 225 Small Bore Pray Ported Meaux Racing SF600 Alum

N/A

2.08/1.60
3.90
No Pipe

146/114
78.1%

203/156
76.8%
59.7/77.6
177/230
.709/.709

260/196
75.4%
76.5/97.5
227/289
.681/.668

306/216
70.6%
90.1/107
267/318
.641/.589

331/230
69.5%
97.4/114
289/339
.578/.522

333/237
71.2%
98/118
290/349
.499/.461

263/192
72.8%
-
.421/.324

AFR LS1 Street 225 Large Bore SF600 Alum

225/85

2.08/1.60
4.125
1 7/8" Pipe

66/76

150/120
80%

220/178
80.9%
64.7/88.5
192/262
.769/.808

266/220
82.7%
78.3/109
232/324
.697/.749

304/241
79.3%
89.5/120
265/355
.637/.657

320/250
78.1%
94.2/124
279/368
.559/.568

252/202
80.1%
1.42/2.94
.421/.324

AFR LS1 230 Mongoose Small Bore V2 Alum

230/85

2.08/1.60
3.90
1 7/8" Pipe

66/76

157/129
82.2%

224/183
81.7%
65.9/91
195/270
.783/.831

272/225
82.7%
80/112
237/332
.713/.766

311/244
78.5%
91.5/121
271/360
.652/.665

324/252
77.8%
95.4/125
283/371
.566/.572

258/207
80.2%
1.41/2.96
.421/.324

AFR LS1 230 Mongoose Large Bore V2 Alum

230/85

2.08/1.60
4.125
1 7/8" Pipe

66/76

158/129
81.6%

230/183
79.6%
67.7/91
201/270
.804/.831

282/225
79.8%
83/112
246/332
.739/.766

320/244
76.3%
94.2/121
279/360
.671/.665

328/252
76.8%
96.5/125
286/371
.573/.572

264/207
78.4%
1.43/2.96
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR LS1 Street 245 Large Bore SF600 Alum

245/87

2.16/1.60
4.125
1 7/8" Pipe

64/74

156/125
80.1%

225/185
82.2%
61.4/92
182/273
.757/.84

274/225
82.1%
74.8/112
222/332
.691/.766

315/247
78.4%
86/123
255/364
.636/.673

345/260
75.4%
94.2/129
279/383
.58/.59

263/208
79.2%
1.41/2.99
.437/.324

AFR LSX 245 Mongoose Strip Large Bore SF600 Alum

245/88

2.16/1.60
4.125
1 7/8" Pipe

65/73

164/131
79.9%

233/185
79.4%
63.6/92
188/273
.784/.84

290/227
78.3%
79.1/113
234/335
.732/.773

332/247
74.4%
90.6/123
268/364
.67/.673

356/257
72.2%
97.2/128
288/379
.599/.584

275/209
76.1%
1.45/2.92
.437/.324

AFR LS1 245 HRM Alum

245/87

2.16/1.60
4.03

68/55
80.9%

152/117
77%

225/176
78.2%
61.4/87.5
182/259
.757/.799

278/214
77%
75.9/106
225/315
.702/.729

318/230
72.3%
86.8/114
257/339
.642/.627

343/241
70.3%
93.6/120
277/355
.577/.547

341/242
71%
93.1/120
276/357
.492/.471

276/203
73.6%
1.40/2.78
.437/.324

AFR LS1 Ported TEA Stage 3 Alum

N/A

68/55
80.9%

141/124
87.9%

207/187
90.3%
-

262/241
92%
-

304/268
88.2%
-

341/278
81.5%
-

346/282
81.5%
-

267/230
86.2%

AFR LS1 Ported ET Performance Alum

240/-

2.08/1.57
4.00

62-72

78/52
66.7%

151/105
69.5%

219/153
69.9%
64.5/79
191/234
.765/.708

270/200
74.1%
79.5/103
235/306
.708/.694

301/220
73.1%
88.6/114
262/337
.631/.611

323/230
71.2%
95.1/119
282/352
.564/.532

333/235
70.6%
98/121
290/360
.499/.466

266/191
71.6%
1.39
.421/.318

AFR LS1 Ported ET Performance Alum

250/-

2.10/1.57
4.10

78/55
70.5%

154/111
72.1%

215/161
74.9%
62.1/83.2
184/246
.744/.745

276/210
76.1%
79.7/108
236/321
.716/.729

318/228
71.7%
91.8/118
272/349
.66/.633

343/236
68.8%
99/122
293/361
.594/.546

352/244
69.3%
102/126
301/373
.522/.484

345/-
99.6
295
.448

286/198
-
1.41
.425/.318

AirWolf LS3 Ported Dr Js Performance Alum

N/A

2.20/1.60

64-72

79/52
65.8%

155/115
74.2%

231/158
68.4%
60.8/78.6
180/233
.763/.718

291/182
62.5%
76.6/90.5
227/268
.721/.62

329/220
66.9%
86.5/109
256/324
.652/.60

354/245
69.2%
93.1/122
276/361
.585/.556

375/255
68%
98.6/127
292/376
.531/.496

385/266
69.1%
101/132
300/392
.477/.453

391/273
69.8%
103/136
305/402
.431/.413

398/278
69.8%
105/138
310/410
.394/.379

323/221
68.5%
-
.446/.324

AirWolf LS7 Ported Dr Js Performance Alum

N/A

2.20/1.60
-
1 7/8" Pipe

64-72

74/52
70.3%

158/109
69%

225/156
69.3%
59.2/77.6
175/230
.743/.709

301/201
66.8%
79.2/100
235/296
.746/.685

337/229
68%
88.7/114
263/337
.668/.624

367/245
66.8%
96.5/122
286/361
.606/.556

397/229
57.7%
104/114
309/337
.562/.446

404/270
66.8%
106/134
315/398
.50/.46

313/206
65.7%
-
.446/.324

All PRO LS Ported Meaux Racing Alum

N/A

2.10/1.60

N/A

151/109
72.2%

215/162
75.3%
62.1/80.6
184/239
.744/.736

267/198
74.2%
77.1/98.5
228/292
.693/.675

303/225
74.3%
87.5/112
259/332
.629/.613

324/240
74.1%
93.5/119
277/354
.561/.545

335/246
73.4%
96.7/122
287/363
.497/.479

338/248
73.4%
97.6/123
289/365
.439/.422

276/204
73.9%
-
.425/.324

All PRO LS Alum

244/88

2.08/1.60

62/72

-
-
-
.421/.324

All PRO LS Alum

250/88

2.125/1.60

62/72

-
-
-
.430/.324

All PRO LSW -1 Ported West Coast Alum

285/108

2.20/1.60
4.155

75/54
72%

155/109
70.3%

242/162
66.9%
63.7/80.6
189/239
.799/.736

309/213
68.9%
81.3/106
241/314
.766/.726

355/241
67.9%
93.4/120
277/355
.704/.657

382/255
66.8%
100/127
298/376
.631/.579

403/261
64.8%
106/130
314/385
.571/.508

410/262 @.750
108
320
.508

322/207
-
1.44/2.42
.446/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

All PRO LSW -2 310 Ported West Coast Alum

310/116

2.20/1.60
4.155

153/111
72.5%

225/170
75.6%
59.2/84.6
175/251
.743/.772

289/211
73%
76/105
225/311
.716/.719

344/235
68.3%
90.5/117
268/346
.682/.64

375/253
67.5%
98.6/126
292/373
.619/.575

398/262
65.8%
105/130
310/386
.563/.51

417/271
65%
110/135
325/399
.517/.462

423/273 @.850
111
330
.466

328/216
-
1.36/2.34
.446/.324

All PRO LSW -2 330 Ported West Coast Alum

330/120

2.25/1.60
4.155

143/112
78.3%

212/173
81.6%
53.3/86
158/255
.685/.786

272/212
77.9%
68.4/105
203/312
.659/.722

333/237
71.2%
83.8/118
248/349
.645/.646

386/257
66.6%
97.1/128
288/379
.623/.584

419/266
63.5%
105/132
312/392
.58/.518

437/274
62.7%
110/136
326/404
.529/.467

446/280
62.8%
112/139
332/413
.48/.424

331/226
68.4%
1.35/2.33
.456/.324

All PRO LSW LS3 -3 265 Ported West Coast Alum

265/100

2.165/1.57
4.03

70/54
77.1%

160/103
64.4%

245/155
63.3%
66.6/80.1
197/237
.822/.717

301/200
66.4%
81.8/103
242/306
.758/.694

343/221
64.4%
93.2/114
276/338
.691/.614

372/239
64.2%
101/123
299/366
.624/.553

384/248
64.6%
104/128
309/380
.552/.492

301/194
64.6%
1.45/2.48
.438/.318

All PRO LSW LS3 -3 278 Ported West Coast Alum

278/108

2.20/1.60
4.155

77/54
70.1%

152/109
71.7%

241/162
67.2%
63.4/80.6
188/239
.796/.736

312/213
68.3%
82.1/106
243/314
.773/.726

357/241
67.5%
93.9/120
278/355
.708/.657

387/241
62.3%
102/120
302/355
.639/.547

405/262
64.7%
107/130
316/386
.573/.51

309/205
66.2%
1.46/2.43
.446/.324

All PRO LSW 12 Deg Alum

272/100

2.15/1.60

62/72

-
-
-
.435/.324

All PRO LSW 12 Deg Alum

284/100

2.20/1.625

62/72

390/260
66.7%
103/125
304/371
.483/.436

-
-
1.37/2.60
.446/.329

All PRO LSW LS7 Retro Ported West Coast Alum

267/108

2.20/1.60
4.155

75/54
72%

157/109
69.4%

253/162
64%
66.6/80.6
197/239
.836/.736

321/213
66.4%
84.4/106
250/314
.795/.726

362/241
66.6%
95.2/120
282/355
.717/.657

390/255
65.4%
103/127
304/376
.644/.579

400/262
65.5%
105/130
312/386
.566/.51

314/207
66%
1.50/2.43
.446/.324

All PRO LSW LS7 Ported West Coast Alum

267/108

2.25/1.615
4.155

79/54
68.4%

166/109
65.7%

253/162
64%
63.6/79.1
189/234
.817/.729

323/213
65.9%
81.2/104
241/308
.782/.719

364/241
66.2%
91.5/118
271/349
.705/.651

394/255
64.7%
99.1/124
294/369
.636/.574

412/263
63.8%
104/128
307/380
.57/.507

319/207
65%
1.54/2.44
.456/.327

All PRO LSW LS7 12 Deg Ported West Coast Alum

280/100

2.18/1.60
4.155

N/A

73/52
71.2%

148/104
70.3%

218/156
71.6%
58.4/77.6
173/230
.727/.709

287/206
71.8%
76.9/102
228/304
.718/.702

331/227
68.6%
88.7/113
263/335
.662/.619

359/240
66.9%
96.2/119
285/354
.598/.545

380/248
65.3%
102/123
302/365
.543/.483

391/254
65%
105/126
310/374
.489/.433

302/205
67.9%
1.40/2.54
.441/.324

All PRO LSW LS7 12 Deg Ported West Coast Alum

285/105

2.20/1.60
4.155
No Pipe

58/70

75/54
72%

161/108
67.1%

242/162
66.9%
63.7/80.6
189/239
.799/.736

295/213
72.2%
77.6/106
230/314
.731/.726

343/241
70.3%
90.2/120
267/355
.68/.657

379/255
67.3%
99.7/127
295/376
.626/.579

401/261
65.1%
105/130
313/385
.568/.508

304/207
68.1%
1.41/2.49
.446/.324

All PRO LSW LS7 12 Deg Ported Jones Engineering Alum

274/-

2.20/1.60

165/110
66.7%

246/144
58.5%
64.7/71.6
192/212
.813/.654

316/204
64.6%
83.1/101
246/301
.783/.695

359/227
63.2%
94.4/113
280/335
.712/.619

372/240
64.5%
97.9/119
290/354
.614/.545

377/250
66.3%
99.2/124
294/368
.534/.487

390/254
65.1%
103/126
304/374
.483/.433

318/204
64.2%
1.42
.446/.324

All PRO LSW LS7 12 Deg Ported ET Performance Alum

N/A

64/47
73.4%

148/100
67.6%

228/142
62.3%
-

318/183
57.5%
-

375/214
57.1%
-

402/237
59%
-

414/250
60.4%
-

419/258
61.6%
-

422/263
62.3%
-

341/206
60.4%

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Avenger LSx CNC Alum

225/75

2.08/1.60

62/62
100%

127/129
101%

187/179
95.7%
55/89
163/264
.653/.813

240/204
85%
70.6/101
209/301
.629/.695

282/222
78.7%
83/110
246/327
.591/.605

308/233
75.6%
90.6/116
269/343
.538/.529

320/238
74.4%
94.2/118
279/351
.479/.463

324/240
74.1%
95.4/119
283/354
.425/.409

255/206
80.8%
1.44/3.20
.421/.324

Brodix BR7 12 Deg Alum

262/-

2.204/1.614

150/113
75.3%

244/158
64.8%
64/77.2
189/229
.805/.711

294/188
63.9%
77.1/91.9
228/272
.727/.635

334/208
62.3%
87.5/102
259/301
.661/.562

360/216
60%
94.4/106
280/313
.594/.486

276/177
63.9%
1.37
.446/.327

Brodix BR7 Ported West Coast Alum

265/99

2.205/1.615
4.155

75/54
72%

155/110
71%

252/156
61.9%
66/76.2
196/226
.831/.702

316/202
63.9%
82.8/98.6
245/292
.781/.682

357/226
63.3%
93.5/110
277/327
.706/.61

387/242
62.5%
101/118
300/350
.638/.544

395/250
63.3%
103/122
306/362
.558/.482

310/198
63.7%
1.49/2.53
.447/.327

Brodix BR7 Ported West Coast Alum

275/99

2.25/1.615
4.155

80/54
67.5%

164/110
67.1%

255/156
61.2%
64.1/76.2
190/226
.824/.702

318/202
63.5%
80/98.6
237/292
.77/.682

364/226
62.1%
91.5/110
271/327
.705/.61

394/242
61.4%
99.1/118
294/350
.636/.544

411/250
60.8%
103/122
306/362
.569/.482

318/198
62.2%
1.49/2.53
.456/.327

Brodix STS BR7 12 Deg Alum

264/-

2.204/1.614

166/119
71.7%

247/171
69.2%
64.7/83.6
192/248
.814/.77

309/208
67.3%
81/102
240/301
.764/.702

351/221
63%
92/108
273/320
.694/.597

375/229
61.1%
98.3/112
291/332
.618/.516

290/190
65.5%
1.42
.446/.327

Brodix STS BR7 264 12 Deg Alum

264/-

2.204/1.614

159/116
73%

240/169
70.4%
62.9/82.6
186/245
.791/.761

303/208
68.6%
79.4/102
235/301
.749/.702

343/224
65.3%
89.9/109
266/324
.679/.605

369/233
63.1%
96.7/114
287/337
.608/.525

364/240
65.9%
95.4/117
283/348
.514/.463

296/198
66.9%
1.40
.446/.327

Brodix STS BR7 273 12 Deg I-50 E-45 Alum

273/-

2.25/1.614

147/116
78.9%

233/169
72.5%
58.6/82.6
174/245
.753/.761

286/208
72.7%
71.9/102
213/301
.693/.702

344/224
65.1%
86.5/109
256/324
.667/.605

381/233
61.2%
95.8/114
284/337
.615/.525

416/240
57.7%
105/117
310/348
.576/.463

301/198
65.9%
1.52
.456/.327

Dart PRO1 LS1 205 Alum

205/85

2.02/1.60
4.00

156/109
69.9%

215/154
71.6%
67.1/76.6
199/227
.774/.699

258/187
72.5%
80.5/93
239/276
.696/.637

290/205
70.7%
90.5/102
268/302
.626/.559

230/164
71.3%
1.41/2.41
.409/.324

Dart PRO1 LS1 225 Alum

225/85

2.05/1.60
4.00

144/109
75.7%

202/154
76.2%
61.2/76.6
181/227
.716/.699

254/187
73.6%
77/93
228/276
.675/.637

290/205
70.7%
87.9/102
260/302
.617/.559

313/214
68.4%
94.8/106
281/315
.555/.486

241/174
72.2%
1.39/2.52
.415/.324

Dart PRO1 LS1 225 Bret Bauer Roll Clean Up Alum

230/-

2.05/1.60

N/A

144/112
77.8%

204/151
74%
61.8/75.1
183/223
.723/.686

260/193
74.2%
78.8/96
233/284
.691/.657

297/214
72.1%
90/106
267/315
.632/.583

312/225
72.1%
94.5/112
280/332
.553/.511

320/232
72.5%
97/115
287/342
.486/.452

256/188
73.3%
1.39
.415/.324

Dart CNC Out of Box Alum

248/-

2.055/1.60
4.03
No Pipe

N/A

70/53
75.7%

146/105
71.9%

210/146
69.5%
63.3/72.6
188/215
.743/.663

253/184
72.7%
76.3/91.5
226/271
.671/.627

295/213
72.2%
88.9/106
264/314
.626/.58

318/227
71.4%
95.9/113
284/335
.562/.516

314/232
73.9%
94.7/115
281/342
.476/.452

315/236
74.9%
95/117
281/348
.418/.402

264/192
72.6%
1.28
.416/.324

Dart PRO1 LS1 CNC 250 HRM Alum

249/94

2.08/1.60
4.03

70/54
77.1%

144/110
76.4%

216/157
72.7%
63.6/78.1
188/231
.755/.713

265/196
74%
78/97.5
231/289
.694/.668

304/225
74%
89.5/112
265/332
.637/.613

318/235
73.9%
93.6/117
277/346
.556/.534

317/240
75.7%
93.3/119
276/354
.475/.467

261/194
74.4%
1.28/2.55
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Dart PRO1 LS1 Ported TEA Alum

240/90

2.08/-
4.00

N/A

70/53
75.7%

144/118
81.9%

213/178
83.6%
62.7
186
.744

271/233
86%
79.8
236
.71

309/261
84.5%
90.9
269
.648

336/275
81.8%
98.9
293
.587

255/213
83.7%
1.40/3.06
.421

Dart PRO1 LS1 Ported TEA Alum

240/90

2.10/-
4.155

N/A

69/53
76.8%

147/122
83%

221/210
95%
63.8
189
.765

278/265
95.3%
80.3
238
.722

325/292
89.8%
93.8
278
.675

354/301
85%
102
303
.613

358/306
85.5%
103
306
.531

281/249
88.9%
1.49/3.40
.425

Edelbrock/ Lingenfelter 61969 LS1 SF600 Alum

202/83

2.02/1.57
3.90
No Pipe

141/115
81.6%

200/162
81%
62.4/83.7
185/248
.72/.75

245/196
80%
76.4/101
227/300
.661/.68

282/209
74.1%
88/108
261/320
.609/.58

300/217
72.3%
93.6/112
277/332
.54/.502

234/180
77%
1.49/2.61
.409/.318

Edelbrock/ Lingenfelter 61899 SF1020 Alum

230/78

2.10/1.60
4.00

147/109
74.1%

211/161
76.3%
60.9/80.1
181/237
.73/.731

260/193
74.2%
75.1/96
222/284
.675/.657

298/214
71.8%
86/106
255/315
.619/.583

321/224
69.8%
92.7/111
275/330
.555/.509

316/227
71.8%
91.2/113
270/335
.469/.442

259/188
72.6%
1.40/2.91
.425/.324

Edelbrock/ Lingenfelter (LPE) HRM Alum

234/84

2.10/1.60
4.03

63/53
84.1%

129/110
85.3%

191/160
83.8%
55.1/79.6
163/236
.661/.727

245/196
80%
70.7/97.5
210/289
.636/.668

284/213
75%
82/106
243/314
.59/.58

318/222
69.8%
91.8/110
272/327
.55/.504

305/227
74.4%
88.1/113
261/335
.452/.442

245/188
76.6%
1.36/2.70
.425/.324

Edelbrock RPM XT LS1/LS2/LS6 61949 Semi-CNC SF1020 Alum

212/76

2.02/1.57

64/57
89.1%

134/107
79.9%

193/147
76.2%
60.2/75.9
178/225
.694/.68

239/180
75.3%
74.6/93
221/275
.645/.625

274/200
73%
85.5/103
253/306
.591/.555

285/210
73.7%
88.9/108
263/321
.513/.486

225/169
75%
1.34/2.76
.409/.318

Edelbrock RPM XT LS1/LS2 61949 Semi-CNC Alum

214/78

2.02/1.57
3.90

137/111
81%

199/153
76.9%
62.1/79
184/234
.716/.708

239/188
78.7%
74.6/97.1
221/288
.645/.653

276/204
73.9%
86.1/105
255/312
.596/.567

286/212
74.1%
89.2/110
264/324
.514/.491

227/174
76.3%
1.34/2.72
.409/.318

Edelbrock LS1 4.8l / 5.3L Ported West Coast Alum

200/81

2.00/1.57
3.78

65/63
96.9%

132/115
87.1%

193/164
85%
61.4/84.7
182/251
.701/.759

235/192
81.7%
74.8/99.2
222/294
.64/.667

267/210
78.7%
85/108
252/321
.582/.583

285/217
76.1%
90.7/112
269/332
.518/.502

222/180
80.8%
1.43/2.68
.405/.318

Edelbrock LS1 Ported West Coast Alum

215/88

2.055/1.60
4.03
Pipe

68/56
82.4%

138/121
87.7%

207/171
82.6%
62.4/85
185/252
.732/.777

257/207
80.5%
77.5/103
230/305
.682/.705

291/227
78%
87.7/113
260/335
.617/.619

307/232
75.6%
92.6/115
274/342
.543/.527

240/192
79.8%
1.43/2.64
.416/.324

Edelbrock LS1 LS2 Ported West Coast Alum

245/88

2.08/1.57
4.03
Pipe

69/65
94.2%

142/119
83.8%

211/167
79.1%
62.1/86.3
184/256
.737/.773

264/210
79.5%
77.7/108
230/321
.692/.729

304/228
75%
89.5/118
265/349
.637/.633

330/236
71.5%
97.1/122
288/361
.576/.546

337/240
71.2%
99.2/124
294/367
.505/.476

265/200
75.6%
1.38/2.73
.421/.318

Edelbrock LS1 LS2 Ported West Coast HRM Alum

245/88

2.08/1.57
4.03

69/54
78.3%

146/115
78.8%

203/171
84.2%
59.7/88.3
177/262
.709/.792

254/210
82.7%
74.8/108
221/321
.666/.729

300/231
77%
88.3/119
262/354
.629/.642

325/238
73.2%
95.6/123
283/364
.568/.551

324/240
74.1%
95.4/124
283/367
.485/.476

259/201
77.6%
1.33/2.73
.421/.318

HRD Ported All Pro LS1/LS6 Alum

N/A

2.00/1.55

N/A

155/115
74.2%

219/166
75.8%
69.7/88
207/261
.796/.778

259/204
78.8%
82.4/108
244/320
.706/.717

295/219
74.2%
93.9/116
278/344
.643/.616

232/176
75.9%
-
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Mast Black Label Ported HRM Alum

270/93

2.20/1.60

74/54
73%

141/106
75.2%

229/154
67.2%
60.2/76.6
178/227
.756/.699

299/200
66.9%
78.7/99.5
233/295
.741/.681

341/232
68%
89.7/115
266/342
.676/.632

371/248
66.8%
97.6/123
289/365
.613/.563

365/261
71.5%
96/130
285/385
.517/.508

291/200
68.8%
1.37/2.81
.446/.324

Mast Black Label Ported LS7 HRM Alum

274/84

2.20/1.61

76/65
85.5%

163/118
72.4%

245/171
69.8%
64.5/84
191/249
.809/.772

307/212
69.1%
80.8/104
239/309
.761/.718

350/229
65.4%
92.1/112
273/333
.694/.62

379/243
64.1%
99.7/119
295/354
.626/.548

395/249
63%
104/122
308/362
.559/.482

307/204
66.4%
1.44/2.96
.446/.326

PRC LS3/L92 13 Deg Ported

N/A

2.165/1.60

60-68

154/117
76%

221/170
76.9%
60/84.6
178/251
.742/.772

281/205
73%
76.3/102
226/302
.707/.698

325/225
69.2%
88.3/112
262/332
.655/.613

354/235
66.4%
96.2/117
285/346
.594/.534

361/243
67.3%
98.1/121
291/358
.519/.473

283/199
70.5%
-
.438/.324

PRC LS3/L92 13 Deg Ported

260/-

2.185/1.60

60-68

157/117
74.5%

224/170
75.9%
59.7/84.6
177/251
.745/.772

279/205
73.5%
74.4/102
220/302
.696/.698

329/225
68.4%
87.7/112
260/332
.657/.613

360/235
65.3%
96/117
284/346
.599/.534

380/243
63.9%
101/121
300/358
.542/.473

288/199
69.1%
1.46
.442/.324

PRC LS Ported

237/85

2.10/1.60
4.30
No Pipe

66/57
86.4%

147/117
79.6%

225/170
75.6%
65/84.6
192/251
.779/.772

284/206
72.5%
82/102
243/304
.737/.702

325/227
69.8%
93.8/113
278/335
.675/.619

334/235
70.4%
96.4/117
286/346
.578/.534

263/191
72.6%
1.41/2.76
.425/.324

ProComp LS1 HRM Alum

219/79

2.055/1.60
4.03

72/57
79.2%

148/113
76.4%

203/155
76.4%
61.2/77.1
181/228
.718/.704

261/195
74.7%
78.7/97
233/287
.692/.664

301/213
70.8%
90.8/106
269/314
.639/.58

321/219
68.2%
96.8/109
287/323
.568/.497

306/224
73.2%
92.3/111
273/330
.464/.436

257/187
72.7%
1.47/2.84
.416/.324

ProComp LS3 CNC HRM Alum

279/94

2.20/1.60

62/53
85.5%

140/116
82.9%

206/161
78.2%
54.2/80.1
161/237
.68/.731

260/194
74.6%
68.4/96.5
203/286
.644/.661

317/225
71%
83.4/112
247/332
.628/.613

350/232
66.3%
92.1/115
273/342
.578/.527

350/244
69.7%
92.1/121
273/360
.496/.475

271/195
72.2%
1.25/2.60
.446/.324

ProComp LS3 Ported Dr Js Performance HRM Alum

279/94

2.20/1.60

65/54
83.1%

141/118
83.7%

211/163
77.3%
55.5/81.1
164/240
.697/.74

270/196
72.6%
71/97.5
210/289
.669/.668

321/225
70.1%
84.4/112
250/332
.636/.613

357/239
66.9%
93.9/119
278/352
.59/.543

359/246
68.5%
94.4/122
280/363
.508/.479

277/198
71.5%
1.29/2.62
.446/.324

ProComp LS7 CNC HRM Alum

265/84

2.20/1.61

74/52
70.3%

158/109
69%

225/156
69.3%
59.2/76.6
175/227
.743/.704

301/201
66.8%
79.2/98.7
235/293
.746/.68

337/229
68%
88.7/112
263/333
.668/.62

367/245
66.8%
96.5/120
286/357
.606/.553

394/259
65.7%
104/127
307/377
.558/.501

297/200
67.3%
1.49/3.08
.446/.326

Pro-Filer LSx Alum

215/-

2.20/1.60

308/-
81
240
.339

-
-
1.43
.446/.324

Pro-Filer LSx Alum

215/-

2.02/1.60

141/104
73.8%

202/154
76.2%
63/76.6
187/227
.727/.699

249/192
77.1%
77.7/95.5
230/283
.672/.654

280/212
75.7%
87.4/105
259/312
.604/.578

301/227
75.4%
93.9/113
278/335
.541/.516

305/231
75.7%
95.2/115
282/340
.47/.45

313/235
75.1%
97.7/117
289/346
.422/.40

256/194
75.7%
1.46
.409/.324

Pro-Filer LSx Alum

235/-

2.08/-

341/-
100
297
.397

-
-
1.45
.421

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Pro-Filer LSx CNC Smithberg Racing Saenz S-600 Alum

250/97

2.10/1.60
4.03
No Pipe

70/52
74.3%

136/85
62.5%

194/122
62.9%
56/60.7
166/180
.671/.554

252/161
63.9%
72.8/80.1
216/237
.654/.548

291/201
69.1%
84/100
249/296
.604/.548

323/227
70.3%
93.3/113
276/335
.559/.516

342/240
70.2%
98.7/119
293/354
.507/.467

256/173
67.4%
1.37/2.47
.425/.324

Pro-Filer LSx CNC Smithberg Racing Alum

250/97

2.10/1.60
4.03
No Pipe

68/52
76.5%

150/85
56.7%

208/122
58.7%
60.1/60.7
178/180
.72/.554

262/161
61.5%
75.6/80.1
224/237
.68/.548

312/201
64.4%
90.1/100
267/296
.648/.548

338/227
67.2%
97.6/113
289/335
.585/.516

349/240
68.8%
101/119
299/354
.518/.467

270/173
64%
1.40/2.47
.425/.324

RHS Pro Elite CNC Gen III

210/97

2.04/1.57

74/57
77%

152/106
69.7%

219/150
68.5%
67/77.5
199/230
.78/.694

266/190
71.4%
81.4/98.1
241/291
.711/.66

301/204
67.8%
92.1/105
273/312
.643/.567

320/211
65.9%
97.9/109
290/323
.57/.488

252/172
68.4%
1.52/2.18
.413/.318

RHS Pro Elite CNC Gen III

225/97

2.04/1.57

71/57
80.3%

153/114
74.5%

214/163
76.2%
65.5/84.2
194/249
.762/.755

276/204
73.9%
84.4/105
250/312
.737/.708

308/222
72.1%
94.2/115
279/340
.658/.617

328/231
70.4%
100/119
297/354
.584/.535

320/236
73.8%
97.9/122
290/361
.489/.468

267/195
73.2%
1.46/2.43
.413/.318

Texas Speed 237 HRM Alum

238/85

2.10/1.60
4.03

72/59
81.9%

149/115
77.2%

226/176
77.9%
65.2/87.5
193/259
.782/.799

281/217
77.2%
81.1/108
240/320
.729/.739

317/234
73.8%
91.5/116
271/345
.658/.638

336/242
72%
97/120
287/357
.581/.55

351/244
69.5%
101/121
300/360
.521/.475

277/205
74%
1.47/2.87
.425/.324

Texas Speed 285 CNC PRC HRM Alum

285/85

2.25/1.61

75/66
88%

167/119
71.3%

248/179
72.2%
62.4/87.9
185/261
.801/.808

311/211
67.8%
78.2/104
232/307
.753/.714

353/224
63.5%
88.8/110
263/326
.684/.607

386/235
60.9%
97.1/115
288/342
.623/.53

403/246
61%
101/121
300/358
.558/.476

311/202
65%
1.41/2.89
.456/.326

Trick Flow 205-LS1 SF600 Alum

205/-

2.00/1.575

299/237
79.3%
95.2/122
282/360
.543/.547

-
-
1.46
.405/.319

Trick Flow 215-LS1 TRE SF1020 Alum

N/A

2.04/1.57

N/A

70/44
62.9%

130/100
76.9%

192/162
84.4%
58.7/83.7
174/248
.684/.75

248/198
79.8%
75.9/102
225/303
.663/.687

282/210
74.5%
86.3/108
256/321
.603/.583

286/214
74.8%
87.5/111
259/328
.509/.495

284/-
86.9
257
.434

237/177
-
-
.413/.318

Trick Flow 215-LS1 CNC TRE SF1020 Alum

N/A

2.04/1.57

N/A

80/47
58.8%

139/105
75.5%

208/167
80.3%
63.6/86.3
189/256
.741/.773

262/203
77.5%
80.2/105
238/311
.70/.705

290/219
75.5%
88.7/113
263/335
.62/.608

308/230
74.7%
94.2/119
279/352
.549/.532

318/-
97.3
288
.486

254/185
-
-
.413/.318

Trick Flow 215-LS1 Meaux Racing Out of Box CNC TRE SF600 Alum

N/A

2.04/1.57
4.03
No Pipe

N/A

118/104
88.1%

193/159
82.4%
59/82.1
175/243
.688/.736

252/194
77%
77.1/100
228/297
.673/.674

296/211
71.3%
90.6/109
268/323
.633/.586

292/219
75%
89.3/113
265/335
.52/.507

293/224
76.5%
89.6/116
266/343
.447/.444

293/226
77.1%
89.6/117
266/346
.391/.392

248/191
77%
-
.413/.318

Trick Flow 215-LS1 CNC SF600 Alum

215/80

2.04/1.575
3.90
1 7/8" Pipe

68/55
80.9%

142/115
81%

215/185
86%
65.8/95
195/281
.766/.854

260/230
88.5%
79.5/118
236/350
.695/.796

300/251
83.7%
91.8/129
272/382
.641/.695

320/259
80.9%
97.9/133
290/394
.57/.598

247/208
84.1%
1.49/3.24
.413/.319

Trick Flow 215-LS1 Ported TEA Alum

215/80

2.05/1.60
3.90
1 7/8" Pipe

66/54
81.8%

138/118
85.5%

218/187
85.8%
66/93
196/276
.773/.849

272/231
84.9%
82.4/115
244/340
.723/.787

308/252
81.8%
93.3/125
276/371
.655/.687

324/262
80.9%
98.2/130
291/386
.574/.595

252/210
83.3%
1.51/3.28
.415/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Trick Flow 220-LS1 SF600 Alum

220/80

2.04/1.575
4.03
1 7/8" Pipe

305/233
76.4%
93.3/120
276/354
.543/.538

-
-
1.39/2.91
.413/.319

Trick Flow 220-LS2 SF600 Alum

220/-

2.055/1.575
4.03
1 7/8" Pipe

67/47
70.1%

133/104
78.2%

211/167
79.1%
63.6/85.7
188/254
.746/.771

261/202
77.4%
78.7/104
233/307
.692/.699

292/222
76%
88/114
261/338
.62/.615

305/233
76.4%
92/120
272/354
.539/.538

240/186
77.2%
1.39
.416/.319

Trick Flow 225-LS2 CNC SF600 Alum

225/80

2.055/1.575

68/55
80.9%

142/115
81%

220/185
84.1%
66.3/95
197/281
.778/.854

279/230
82.4%
84.1/118
249/350
.74/.796

316/251
79.4%
95.3/129
282/382
.671/.695

338/259
76.6%
102/133
302/394
.598/.598

259/208
80.3%
1.50/3.24
.416/.319

Trick Flow 225-LS2 CNC Out of Box Alum

N/A

2.055/1.575

N/A

69/56
81.2%

148/113
76.4%

219/175
79.9%
66/89.8
196/266
.774/.807

267/217
81.3%
80.5/111
239/330
.708/.751

310/229
73.9%
93.5/118
277/348
.658/.634

328/239
72.9%
98.9/123
293/363
.58/.551

254/195
76.5%
-
.416/.319

Trick Flow 225-LS2 Ported TEA Alum

225/80

2.055/1.60

67/54
80.6%

141/118
83.7%

223/187
83.9%
67.2/93
199/276
.789/.849

279/231
82.8%
84.1/115
249/340
.74/.787

316/252
79.7%
95.3/125
282/371
.671/.687

335/262
78.2%
101/130
299/386
.592/.595

259/210
81.1%
1.49/3.28
.416/.324

Trick Flow 225-LS Ported TEA Alum

225/80

2.055/1.60
4.03
1 7/8" Pipe

71/61
85.9%

144/120
83.3%

222/187
84.2%
66.9/93
198/276
.785/.849

279/233
83.5%
84.1/116
249/343
.74/.794

316/260
82.3%
95.3/129
282/383
.671/.709

336/274
81.5%
101/136
300/404
.594/.622

259/215
82.8%
1.49/3.43
.416/.324

Trick Flow 230 Advanced Induction SF600 Alum

230/-

2.055/1.575
4.00
1 7/8" Pipe

N/A

69/55
79.7%

146/108
74%

214/155
72.4%
64.5/79.6
191/236
.757/.715

274/203
74.1%
82.6/104
245/309
.727/.703

313/223
71.2%
94.4/114
280/339
.664/.617

334/244
73.1%
101/125
298/371
.591/.563

338/248
73.4%
102/127
302/377
.512/.49

270/197
72.9%
1.47
.416/.319

Trick Flow 235-LS2 Ported TEA Alum

235/80

2.08/1.60
4.125
1 7/8" Pipe

68/53
77.9%

146/124
84.9%

235/199
84.7%
69.2/99
205/293
.821/.904

293/244
83.3%
86.2/121
255/360
.768/.831

329/265
80.5%
96.8/132
287/391
.69/.722

344/276
80.2%
101/137
300/407
.601/.627

269/222
82.3%
1.46/3.45
.421/.324

Trick Flow 245-LS2 Ported TEA Alum

245/85

2.10/1.60
4.185
1 7/8" Pipe

69/56
81.2%

146/130
89%

237/201
84.8%
68.4/100
203/296
.82/.913

294/249
84.7%
84.9/124
252/367
.763/.848

336/269
80.1%
97/134
287/396
.698/.733

353/276
78.2%
102/137
302/407
.611/.627

273/225
82.4%
1.44/3.25
.425/.324

Trick Flow 245-LS2 Ported TEA Nitrous Exh Alum

245/85

2.10/1.60
4.185
1 7/8" Pipe

69/55
79.7%

146/122
83.6%

237/199
84%
68.4/99
203/293
.82/.904

294/250
85%
84.9/124
252/368
.763/.852

336/277
82.4%
97/138
287/408
.698/.755

353/290
82.2%
102/144
302/427
.611/.659

273/228
83.3%
1.44/3.41
.425/.324

Trick Flow 245-LS Ported TEA Out of Box Meaux Racing SF600 Alum

N/A

2.10/1.60
4.125
No Pipe

N/A

138/111
80.4%

223/162
72.6%
64.4/80.6
191/239
.772/.736

280/203
72.5%
80.8/101
240/299
.727/.692

314/223
71%
90.7/111
269/329
.652/.608

335/230
68.7%
96.7/114
287/339
.58/.522

318/234
73.6%
91.8/116
272/345
.472/.456

326/238
73%
94.1/118
279/351
.423/.405

276/200
72.4%
-
.425/.324

Trick Flow 245-LS Ported TEA Short Turn Ported Meaux Racing SF600 Alum

N/A

2.10/1.60
4.125
No Pipe

N/A

138/111
80.4%

223/163
73.1%
64.4/81.1
191/240
.772/.74

282/205
72.7%
81.4/102
241/302
.732/.698

316/227
71.8%
91.2/113
270/335
.656/.619

341/235
68.9%
98.5/117
292/346
.59/.534

339/240
70.8%
97.9/119
290/354
.503/.467

334/242
72.5%
96.4/120
286/357
.433/.412

282/203
72.1%
-
.425/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Trick Flow 265-LS2 Ported TEA Alum

265/85

2.10/1.60
4.155
2 Pipe

59/58
98.3%

128/129
100%

210/189
90%
60.6/94
180/279
.727/.858

281/233
82.9%
81.1/116
240/343
.729/.794

340/256
75.3%
98.2/127
291/377
.706/.698

352/267
75.9%
102/133
301/393
.609/.606

368/272
73.9%
106/135
315/401
.546/.529

377/274
72.7%
109/136
323/404
.489/.467

382/277
72.5%
110/138
327/408
.441/.419

388/279
71.9%
112/139
332/411
.403/.38

314/242
77%
1.46/3.28
.425/.324

Trick Flow 265-LS2 Ported TEA Nitrous Exh Alum

265/85

2.10/1.60
4.155
2 Pipe

59/55
93.2%

128/122
95.3%

210/199
94.8%
60.6/99
180/293
.727/.904

281/250
89%
81.1/124
240/368
.729/.852

340/277
81.5%
98.2/138
291/408
.706/.755

352/290
82.4%
102/144
301/427
.609/.659

368/298
81%
106/148
315/439
.546/.58

377/303
80.4%
109/151
323/447
.489/.516

382/305
79.8%
110/152
327/449
.441/.462

388/306
78.9%
112/152
332/451
.403/.417

314/261
83.2%
1.46/3.60
.425/.324

Trick Flow 235-LSX CNC SF600 Alum

235/80

2.08/1.60
4.125
1 7/8" Pipe

65/55
84.6%

144/124
86.1%

229/196
85.6%
67.4/97.5
200/289
.80/.89

287/242
84.3%
84.5/120
250/357
.752/.824

323/260
80.5%
95.1/129
282/383
.677/.709

340/270
79.4%
100/134
296/398
.594/.613

265/218
82.5%
1.45/3.38
.421/.324

Trick Flow 235 CNC HRM Alum

234/80

2.08/1.60
4.03

67/57
85.1%

144/113
78.5%

221/172
77.8%
65/85.5
193/253
.772/.781

272/213
78.3%
80/106
237/314
.713/.726

309/230
74.4%
90.9/114
269/339
.648/.627

333/240
72.1%
98/119
290/354
.582/.545

315/244
77.5%
92.7/121
275/360
.472/.475

266/202
76%
1.42/3.05
.421/.324

World Warhawk LS1X Alum

235/80

2.08/1.60

64/72

300/219
73%
88.3/109
262/323
.524/.497

-
-
1.28/2.74
.421/.324

World Warhawk LS1X Alum

235/80

2.08/1.60

N/A

65/63
96.9%

137/119
86.9%

202/172
85.1%
59.4/85.5
176/253
.706/.781

247/194
78.5%
72.7/96.5
215/286
.647/.661

280/206
73.6%
82.4/102
244/304
.587/.561

304/211
69.4%
89.5/105
265/311
.531/.479

234/180
77.1%
1.29/2.64
.421/.324

World Warhawk LS1 15 Deg SF600 Alum

235/87

2.08/1.60
-
No Pipe

64/72

72/63
87.5%

146/118
80.8%

209/155
74.2%
61.5/77.1
182/228
.73/.704

254/185
72.8%
74.8/92
221/273
.666/.63

282/204
72.3%
83/101
246/301
.591/.556

304/215
70.7%
89.5/107
265/317
.531/.488

313/221
70.6%
92.1/110
273/326
.469/.43

321/223
69.5%
94.5/111
280/329
.421/.38

261/189
72.2%
1.37/2.56
.421/.324

World Warhawk LS1 15 Deg Kuntz CNC SF600 Alum

255/90

2.10/1.60
-
No Pipe

67/62
92.5%

137/123
89.8%

208/169
81.3%
60.1/84.1
178/249
.72/.768

268/208
77.6%
77.4/103
229/307
.696/.709

307/233
75.9%
88.6/116
263/343
.637/.635

332/246
74.1%
95.9/122
284/363
.574/.559

345/253
73.3%
99.6/126
295/373
.512/.492

347/256
73.8%
100/127
297/377
.45/.436

278/213
76.5%
1.36/2.84
.425/.324

World Warhawk 255 CNC HRM Alum

255/87

2.10/1.60
4.03

63/56
88.9%

137/115
83.9%

200/165
82.5%
57.7/82.1
171/243
.692/.749

260/198
76.2%
75.1/98.5
222/292
.675/.675

297/214
72.1%
85.7/106
254/315
.617/.583

313/224
71.6%
90.4/111
268/330
.542/.509

328/233
71%
94.7/116
281/343
.486/.454

256/192
74.9%
1.29/2.68
.425/.324

World Warhawk 12 Deg SF600 Alum

285/106

2.20/1.60

64/72

58/35
60.3%

123/66
53.7%

194/111
57.2%
51/55.2
151/164
.641/.504

256/148
57.8%
67.3/73.6
200/218
.634/.504

304/175
57.6%
80/87
237/258
.603/.477

333/193
58%
87.6/96
260/284
.55/.438

354/203
57.3%
93.1/101
276/299
.501/.395

335/211
63%
88.1/105
261/311
.415/.359

271/158
58.3%
1.24/1.99
.446/.324

World Warhawk 12 Deg Kuntz CNC SF600 Alum

296/110

2.20/1.60
-
No Pipe

76/55
72.4%

178/108
60.7%

241/160
66.4%
63.4/79.6
188/236
.796/.727

309/198
64.1%
81.3/98.5
241/292
.766/.675

357/225
63%
93.9/112
278/332
.708/.613

387/249
64.3%
102/124
302/367
.639/.565

396/264
66.7%
104/131
309/389
.561/.514

403/274
68%
106/136
314/404
.499/.467

324/211
65.1%
1.36/2.49
.446/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy LT1

170/62

1.94/1.50

187/139
74.3%
63.3/78.7
187/233
.525/.505

190/145
76.3%
64.3/82.1
190/243
.427/.422

189/142
75.3%
1.12/2.34
.393/.304

Chevy LT1

170/62

1.94/1.50

60/46
76.7%

120/94
78.3%

171/122
71.3%
57.8/69
171/205
.641/.591

197/140
71.1%
66.6/79.2
197/235
.553/.509

207/154
74.4%
70/87.1
207/258
.465/.448

201/156
77.6%
68/88.3
201/262
.376/.378

179/133
74.3%
1.22/2.52
.393/.304

Chevy LT1 Night Train

N/A

1.94/-

N/A

56/-

106/-

164/-
55.5
164
.614

205/-
69.4
205
.576

210/-
71
211
.472

209/-
70.7
209
.391

179
-
-
.393

Chevy LT1 NPS

N/A

1.94/1.50
4.016
No Pipe

N/A

61/50
82%

119/97
81.5%

170/126
74.1%
57.5/71.3
170/211
.637/.61

203/148
72.9%
68.7/83.8
203/248
.57/.538

209/155
74.2%
70.7/87.7
209/260
.47/.451

208/158
76%
70.4/89.4
208/265
.39/.383

182/137
75.2%
-
.393/.304

Chevy LT1 '94 Kendrick Auto

N/A

1.94/1.50

N/A

61/48
78.7%

114/88
77.2%

163/117
71.8%
55.1/66.2
163/196
.611/.567

187/135
72.2%
63.3/76.4
187/226
.525/.491

190/144
75.8%
64.3/81.5
190/241
.427/.419

164/121
74%
-
.393/.304

Chevy LT1 '94 Ported Kendrick Auto

N/A

1.94/1.50

N/A

69/50
72.5%

139/101
72.7%

181/130
71.8%
61.2/73.6
181/218
.678/.63

223/159
71.3%
75.4/90
224/267
.627/.578

247/178
72.1%
83.6/101
248/298
.555/.517

198/142
71.9%
-
.393/.304

Chevy LT1 290 Weingartner Racing Iron

N/A

1.94/1.50
4.125
No Pipe

N/A

73/52
71.2%

142/106
74.6%

205/138
67.3%
69.4/78.1
205/231
.768/.669

237/152
64.1%
80.2/86
238/255
.666/.552

236/157
66.5%
79.8/88.8
237/263
.53/.456

239/201
84.1%
80.9/114
240/337
.448/.487

212/151
71.2%
-
.393/.304

Chevy LT1 372 Alum CHP

170/62

1.94/1.50
-
No Pipe

72/52
72.2%

129/100
77.5%

180/130
72.2%
60.9/73.6
180/218
.674/.63

213/142
66.7%
72.1/80.4
214/238
.598/.516

214/149
69.6%
72.4/84.3
215/250
.481/.433

215/154
71.6%
72.7/87.1
216/258
.403/.373

190/135
71%
1.26/2.48
.393/.304

Chevy LT1 372 Alum CHP

170/62

1.94/1.50
-
Pipe

72/53
73.6%

129/101
78.3%

180/136
75.6%
60.9/77
180/228
.674/.659

213/155
72.8%
72.1/87.7
214/260
.598/.563

214/165
77.1%
72.4/93.4
215/277
.481/.48

215/171
79.5%
72.7/96.8
216/287
.403/.414

190/146
76.6%
1.26/2.76
.393/.304

Chevy LT1 374 Ported Alum

N/A

2.00/1.55

N/A

65/48
73.8%

130/89
68.5%

184/121
65.8%
58.6/64.1
174/190
.669/.567

209/148
70.8%
66.5/78.4
197/232
.57/.52

227/158
69.6%
72.3/83.7
214/248
.495/.444

240/163
67.9%
76.4/86.4
226/256
.436/.382

198/136
68.6%
-
.405/.314

Chevy LT1 374 Ported Smithberg Racing Alum

190/75

2.00/1.55

285/-
90.7
269
.518

295/-
93.9
278
.459

290
-
1.55
.405/.314

Chevy LT1 561 Night Train Alum

N/A

1.94/-

N/A

58/-

115/-

170/-
57.5
170
.637

213/-
72.1
214
.598

221/-
74.8
222
.497

218/-
73.8
219
.408

187
-
-
.393

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy LT1 561 TriPinTaZ Alum

N/A

1.94/1.50

N/A

63/46
73%

120/93
77.5%

170/121
71.2%
57.5/68.5
170/203
.637/.586

198/142
71.7%
67/80.4
198/238
.556/.516

201/150
74.6%
68/84.9
201/252
.452/.436

202/154
76.2%
68.3/87.1
202/258
.378/.373

178/132
74.1%
-
.393/.304

Chevy LT1 561 Ported Smithberg Racing Alum

190/80

2.00/1.56
4.03
No Pipe

69/50
72.5%

140/109
77.9%

199/139
69.8%
63.3/72.7
188/215
.723/.648

2339/164

273/183
67%
86.9/95.7
257/284
.595/.512

283/196
69.3%
90.1/103
267/304
.514/.457

224/157
70.1%
1.49/2.45
.405/.316

Chevy LT1 643 TriPinTaZ Alum

N/A

1.94/1.50

N/A

67/47
70.1%

121/90
74.4%

170/120
70.6%
57.5/67.9
170/201
.637/.581

205/139
67.8%
69.4/78.7
205/233
.576/.505

206/147
71.4%
69.7/83.2
206/246
.463/.427

205/150
73.2%
69.4/84.9
205/252
.384/.363

181/129
71.2%
-
.393/.304

Chevy LT1 643 '96 CHW Alum

172/65

1.94/1.50

62/52
83.9%

125/100
80%

175/130
74.3%
59.2/73.6
175/218
.656/.63

209/152
72.7%
70.7/86
209/255
.587/.552

230/161
70%
77.8/91.1
231/270
.517/.468

223/173
77.6%
75.4/97.9
224/290
.418/.419

223/179
80.3%
75.4/101
224/300
.358/.372

198/149
75.5%
1.34/2.75
.393/.304

Chevy LT1 643 '96 Ported CHW Alum

188/70

2.02/1.50

70/64
91.4%

144/112
77.8%

199/138
69.3%
62.1/78.1
184/231
.716/.669

237/155
65.4%
74/87.7
219/260
.639/.563

262/164
62.6%
81.8/92.8
242/275
.566/.477

269/178
66.2%
83.9/101
249/298
.484/.431

265/185
69.8%
82.7/105
245/310
.409/.384

229/155
67.7%
1.43/2.64
.409/.304

Chevy LT1 Ported Brian Alum

N/A

2.00/1.56

66/48
72.7%

129/93
72.1%

183/130
71%
58.3/68
173/202
.665/.606

229/168
73.4%
72.9/87.9
216/260
.624/.587

262/189
72.1%
83.4/98.9
247/293
.571/.528

265/192
72.5%
84.4/100
250/298
.481/.447

214/154
72.3%
-
.405/.316

Chevy LT1 Ported CDN Performance Stage 2 SF600 Alum

N/A

2.02/1.60

N/A

76/79
103%

150/147
98%

196/183
93.4%
61.2/91
181/270
.705/.831

227/201
88.5%
70.8/100
210/296
.613/.685

256/213
83.2%
79.9/106
237/314
.553/.58

274/220
80.3%
85.5/109
253/324
.493/.50

221/193
87.4%
-
.409/.324

Chevy LT1 Ported TEA Stage 2 Alum

N/A

2.00/1.56

N/A

69/56
81.2%

140/119
85%

200/165
82.5%
63.7/86.3
189/256
.727/.769

244/198
81.1%
77.7/104
230/307
.665/.692

275/220
80%
87.5/115
259/341
.60/.615

279/237
84.9%
88.8/124
263/367
.507/.552

228/188
82.5%
-
.405/.316

Chevy LT1 Ported TEA Stage 3 Alum

N/A

2.02/1.60

N/A

72/56
77.8%

148/117
79.1%

218/161
73.9%
68/80.1
202/237
.784/.731

261/204
78.2%
81.4/101
241/301
.704/.695

289/233
80.6%
90.2/116
267/343
.624/.635

294/252
85.7%
91.7/125
272/371
.529/.572

294/262
89.1%
91.7/130
272/386
.453/.51

251/205
81.7%
-
.409/.324

Chevy LT1 Ported ET Performance Alum

207/-

2.00/1.55
4.03

66/49
74.2%

135/101
74.8%

195/142
72.8%
62.1/75.3
184/223
.709/.666

235/169
71.9%
74.8/89.6
222/265
.64/.594

260/186
71.5%
82.8/98.6
245/292
.567/.523

263/200
76%
83.7/106
248/314
.478/.469

218/160
73.3%
1.27
.405/.314

Chevy LT1 Ported No Rush Alum

N/A

2.00/1.55
-
No Pipe

N/A

71/60
84.5%

142/109
76.8%

193/148
76.7%
61.4/78.4
182/232
.701/.694

237/179
75.5%
75.4/94.9
224/281
.646/.629

262/193
73.7%
83.4/102
247/303
.571/.543

271/198
73.1%
86.3/105
256/311
.492/.464

275/202
73.5%
87.5/107
259/317
.428/.406

230/172
74.6%
-
.405/.314

Chevy LT1 Ported No Rush Alum

N/A

2.00/1.55
-
Pipe

N/A

71/62
87.3%

142/114
80.3%

193/158
81.9%
61.4/83.7
182/248
.701/.741

237/191
80.6%
75.4/101
224/300
.646/.672

262/206
78.6%
83.4/109
247/323
.571/.58

271/216
79.7%
86.3/114
256/339
.492/.506

275/219
79.6%
87.5/116
259/344
.428/.44

230/184
80%
-
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy LT1 Ported 190 Advanced Induction SF600 Alum

190/-

2.00/1.55
4.03
No Pipe

N/A

70/56
80%

143/113
79%

197/149
75.6%
62.7/79
186/234
.716/.699

244/177
72.5%
77.7/93.8
230/278
.665/.622

269/189
70.3%
85.6/100
254/297
.586/.532

275/195
70.9%
87.5/103
259/306
.50/.457

276/200
72.5%
87.9/106
260/314
.43/.402

234/171
72.9%
1.45
.405/.314

Chevy LT1 Ported 200 Advanced Induction SF600 Alum

200/-

2.00/1.56
4.03
No Pipe

52-56

69/65
94.2%

148/116
78.4%

205/153
74.6%
65.3/80
193/237
.745/.713

247/179
72.5%
78.6/93.7
233/277
.673/.625

275/190
69.1%
87.5/99.4
259/295
.60/.531

288/196
68.1%
91.7/103
272/304
.523/.457

290/201
69.3%
92.3/105
274/312
.452/.401

242/173
71.2%
1.45
.405/.316

Chevy LT1 Kyle Ported Blackstone Alum

N/A

2.02/1.60
-
Pipe

N/A

74/64
86.5%

147/118
80.3%

203/167
82.3%
63.3/83.1
188/246
.73/.759

249/197
79.1%
77.7/98
230/290
.672/.671

269/214
79.6%
83.9/106
249/315
.581/.583

284/225
79.2%
88.6/112
263/332
.511/.511

287/232
80.8%
89.6/115
265/342
.443/.452

240/192
80.1%
-
.409/.324

Chevy LT1 Ported GTP Stage 2 Alum

N/A

2.00/1.56

N/A

70/51
72.9%

122/119
97.5%

186/145
78%
59.2/75.9
175/225
.676/.675

222/176
79.3%
70.7/92.1
209/273
.605/.615

254/204
80.3%
80.9/107
240/316
.554/.57

266/217
81.6%
84.7/114
251/336
.483/.505

210/172
82%
-
.405/.316

Chevy LT1 Ported GTP Stage 2 Flowed Alum

188/-

2.00/1.56

135/106
78.5%

184/140
76.1%
58.6/73.2
174/217
.669/.652

228/164
71.9%
72.6/85.8
215/254
.621/.573

258/182
70.5%
82.1/95.2
243/282
.562/.509

267/192
71.9%
85/100
252/298
.485/.447

263/195
74.1%
83.7/102
248/302
.41/.389

223/163
73.3%
1.42
.405/.316

Chevy LT4 '96 Kendrick Auto

N/A

2.00/1.55

N/A

69/53
76.8%

135/99
73.3%

184/125
67.9%
58.6/66.2
174/196
.669/.586

218/143
65.6%
69.4/75.8
206/225
.594/.503

241/158
65.6%
76.7/83.7
227/248
.525/.444

195/131
67.5%
-
.405/.314

Chevy LT4 '96 Ported Kendrick Auto

N/A

2.00/1.55

N/A

82/58
70.7%

149/104
69.8%

193/144
74.6%
61.4/76.3
182/226
.701/.675

232/173
74.6%
73.8/91.7
219/272
.632/.608

261/189
72.4%
83.1/100
246/297
.569/.532

209/153
73.1%
-
.405/.314

Chevy LT4 Alum

195/-

2.00/1.55

156/121
77.6%

208/149
71.6%
66.2/79
196/234
.756/.699

243/177
72.8%
77.3/93.8
229/278
.662/.622

265/190
71.7%
84.4/101
250/298
.578/.535

257/196
76.3%
81.8/104
242/308
.467/.459

226/167
73.8%
1.36
.405/.314

Chevy LT4 Alum CHP

195/-

2.00/1.55
-
No Pipe

78/67
85.9%

147/109
74.1%

197/133
67.5%
62.7/70.5
186/209
.716/.624

230/159
69.1%
73.2/84.3
217/250
.627/.559

250/172
68.8%
79.6/91.2
236/270
.545/.484

243/177
72.8%
77.3/93.8
229/278
.441/.415

213/150
70.3%
1.28
.405/.314

Chevy LT4 Alum CHP

195/-

2.00/1.55
-
Pipe

78/67
85.9%

147/114
77.6%

197/141
71.6%
62.7/74.7
186/221
.716/.661

230/167
72.6%
73.2/88.5
217/262
.627/.587

250/180
72%
79.6/95.4
236/283
.545/.506

243/185
76.1%
77.3/98
229/290
.441/.434

213/157
73.8%
1.28
.405/.314

Chevy LT4 Ported ET Performance Alum

N/A

2.00/1.55
4.03

71/47
66.2%

134/97
72.4%

192/132
68.8%
61.1/70
181/207
.698/.619

238/165
69.3%
75.8/87.4
224/259
.649/.58

268/185
69%
85.3/98
253/290
.584/.52

277/195
70.4%
88.2/103
261/306
.503/.457

222/155
69.8%
-
.405/.314

Chevy LT4 Ported No Rush Alum

N/A

2.00/1.55
-
No Pipe

N/A

72/62
86.1%

142/108
76.1%

195/151
77.4%
62.1/80
184/237
.709/.708

239/177
74.1%
76.1/93.8
225/278
.651/.622

270/191
70.7%
85.9/101
255/300
.589/.537

281/198
70.5%
89.4/105
265/311
.511/.464

288/201
69.8%
91.7/107
272/316
.448/.404

290/204
70.3%
92.3/108
274/320
.395/.359

244/176
72.1%
-
.405/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy LT4 Ported PBR Alum

N/A

2.05/1.60

N/A

167/126
75.4%

214/166
77.6%
64.8/82.6
192/245
.759/.754

258/193
74.8%
78.2/96
232/284
.686/.657

290/210
72.4%
87.9/104
260/309
.617/.572

310/218
70.3%
93.9/108
278/321
.549/.495

317/226
71.3%
96/112
285/333
.482/.44

259/190
73.2%
-
.415/.324

Chevy LT4 Ported 21x Advanced Induction SF600 Alum

52-56

2.00/1.56
4.03
No Pipe

N/A

71/61
85.9%

144/107
74.3%

202/145
71.8%
64.3/75.9
191/225
.734/.675

250/175
70%
79.6/91.6
236/271
.681/.611

281/194
69%
89.4/101
265/301
.613/.542

296/203
68.6%
94.2/106
279/315
.538/.473

300/209
69.7%
95.5/109
283/324
.467/.417

246/172
70.1%
-
.405/.316

AFR LT1 180 Street Old SF600 Alum

180/64

2.02/1.60
4.06
1 3/4" Pipe

56-74

129/108
83.7%

195/156
80%
60.8/77.6
180/230
.702/.709

240/178
74.2%
74.9/88.5
222/262
.648/.606

255/190
74.5%
79.6/94.5
236/280
.55/.518

260/194
74.6%
81.1/96.5
240/286
.468/.441

216/165
76.6%
1.44/3.03
.409/.324

AFR LT1 180 Street SF600 Alum

180/64

2.02/1.60
4.06
1 3/4" Pipe

56-74

138/110
79.7%

198/158
79.8%
61.8/78.6
183/233
.712/.718

240/190
79.2%
74.9/94.5
222/280
.648/.647

260/207
79.6%
81.1/103
240/305
.561/.564

209/166
79.5%
1.44/3.23
.409/.324

AFR LT1 180 Comp Old SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

144/102
70.8%

206/152
73.8%
64.3/75.6
190/224
.741/.69

245/190
77.6%
76.4/94.5
227/280
.661/.647

260/204
78.5%
81.1/101
240/301
.561/.556

268/211
78.7%
83.6/105
248/311
.482/.479

225/172
76.5%
-
.409/.324

AFR LT1 180 Comp SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

142/115
81%

203/165
81.3%
63.3/82.1
188/243
.73/.749

247/200
81%
77.1/99.5
228/295
.666/.681

270/217
80.4%
84.3/108
250/320
.583/.591

216/174
80.9%
-
.409/.324

AFR LT1 190 Street SF600 Alum

190/64

2.02/1.60

56-74

129/108
83.7%

195/156
80%
60.8/77.6
180/230
.702/.709

240/178
74.2%
74.9/88.5
222/262
.648/.606

260/190
73.1%
81.1/94.5
240/280
.561/.518

262/194
74%
81.8/96.5
242/286
.471/.441

217/165
76.1%
1.38/3.03
.409/.324

AFR LT1/LT4 195 Street Old SF600 Alum

195/64

2.02/1.60
4.06
1 3/4" Pipe

56-74

132/108
81.8%

198/156
78.8%
61.8/77.6
183/230
.712/.709

240/178
74.2%
74.9/88.5
222/262
.648/.606

260/190
73.1%
81.1/94.5
240/280
.561/.518

262/194
74%
81.8/96.5
242/286
.471/.441

218/165
75.6%
1.34/3.03
.409/.324

AFR LT1/LT4 195 Street SF600 Alum

195/64

2.02/1.60
4.06
1 3/4" Pipe

56-74

137/110
80.3%

196/156
79.6%
61.2/77.6
181/230
.705/.709

243/190
78.2%
75.8/94.5
225/280
.656/.647

274/207
75.5%
85.5/103
253/305
.591/.564

213/166
78%
1.41/3.23
.409/.324

AFR LT1/LT4 195 Comp Old SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

135/110
81.5%

201/157
78.1%
62.7/78.1
186/231
.723/.713

249/180
72.3%
77.7/89.5
230/265
.672/.613

275/195
70.9%
85.8/97
254/287
.594/.531

280/208
74.3%
87.4/103
259/307
.504/.472

228/170
74.6%
-
.409/.324

AFR LT1/LT4 195 Comp SF600 Alum

N/A

2.02/1.60
4.06
1 3/4" Pipe

140/115
82.1%

202/165
81.7%
63/82.1
187/243
.727/.749

248/200
80.6%
77.4/99.5
229/295
.669/.681

280/217
77.5%
87.4/108
259/320
.604/.591

300/225
75%
93.6/112
277/332
.54/.511

234/184
78.8%
-
.409/.324

AFR LT4 195 Street SF600 Alum

195/64

2.05/1.60
4.06
1 3/4" Pipe

55/65

146/119
81.5%

201/166
82.6%
60.9/82.6
180/245
.713/.754

247/197
79.8%
74.8/98
222/290
.657/.671

275/213
77.5%
83.3/106
247/314
.585/.58

217/174
80%
1.41/3.33
.415/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR LT4 195 Comp SF600 Alum

195/64

2.08/1.60
4.06
1 3/4" Pipe

55/65

151/125
82.8%

211/172
81.5%
62.1/85.5
184/253
.737/.781

260/207
79.6%
76.5/103
227/305
.681/.705

293/224
76.5%
86.2/111
255/330
.614/.61

308/233
75.6%
90.6/116
269/343
.538/.529

245/192
78.6%
1.58/3.64
.421/.324

AFR LT1/LT4 203 Race SF600 Alum

203/80

2.08/1.60
4.125
1 7/8" Pipe

129/112
86.8%

188/145
77.1%
55.3/72.1
164/214
.657/.659

234/185
79.1%
68.9/92
204/273
.613/.63

263/205
77.9%
77.4/102
229/302
.551/.559

275/215
78.2%
80.9/107
240/317
.48/.488

272/220
80.9%
80/109
237/324
.407/.428

227/180
79.5%
1.35/2.75
.421/.324

AFR LT1/LT4 210 Street SF600 Alum

210/80

2.08/1.60
4.125
1 7/8" Pipe

139/110
79.1%

199/158
79.4%
58.6/78.6
174/233
.695/.718

249/192
77.1%
73.3/95.5
217/283
.652/.654

279/210
75.3%
82.1/104
243/309
.585/.572

295/220
74.6%
86.8/109
257/324
.515/.50

301/224
74.4%
88.6/111
262/330
.451/.436

244/186
76.2%
1.43/2.80
.421/.324

AFR LT1/LT4 210 Race Old SF600 Alum

210/80

2.08/1.60
4.125
1 7/8" Pipe

135/112
83%

197/145
73.6%
58/72.1
172/214
.688/.659

245/185
75.5%
72.1/92
214/273
.642/.63

273/205
75.1%
80.3/102
238/302
.572/.559

282/215
76.2%
83/107
246/317
.493/.488

285/220
77.2%
83.9/109
249/324
.427/.428

236/180
76.4%
1.36/2.75
.421/.324

AFR LT1/LT4 210 Comp SF600 Alum

210/80

2.08/1.60
4.125
1 7/8" Pipe

147/120
81.6%

206/166
80.6%
60.6/82.6
180/245
.72/.754

257/214
83.3%
75.6/106
224/315
.673/.729

290/225
77.6%
85.3/112
253/332
.608/.613

308/235
76.3%
90.6/117
269/346
.538/.534

312/240
76.9%
91.8/119
272/354
.467/.467

253/200
78.9%
1.49/3.00
.421/.324

AFR LT4 210 Race V2 Alum

210/80

2.08/1.60
4.06
1 3/4" Pipe

65-75

145/110
75.9%

199/158
79.4%
58.6/78.6
174/233
.695/.718

255/192
75.3%
75/95.5
222/283
.668/.654

292/210
71.9%
85.9/104
255/309
.612/.572

309/220
71.2%
90.9/109
269/324
.54/.50

240/178
74.2%
1.47/2.75
.421/.324

AFR LT4 210 Comp V2 Alum

210/80

2.08/1.60
4.06
1 3/4" Pipe

65-75

147/120
81.6%

201/166
82.6%
59.2/82.6
175/245
.702/.754

257/214
83.3%
75.6/106
224/315
.673/.729

296/225
76%
87.1/112
258/332
.621/.613

318/235
73.9%
93.6/117
277/346
.556/.534

244/192
78.8%
1.51/2.94
.421/.324

AFR LT4 Eliminator #10331 NPS Alum

N/A

2.05/1.60
4.0157
No Pipe

68/58
85.3%

145/112
77.2%

199/158
79.4%
60.3/78.6
179/233
.705/.718

242/186
76.9%
73.3/92.5
217/274
.643/.634

269/198
73.6%
81.5/98.5
241/292
.572/.54

266/207
77.8%
80.6/103
239/305
.471/.47

262/212
80.9%
79.4/105
235/312
.398/.413

231/179
77.6%
-
.415/.324

AFR LT4 Ported Race Prep Alum

213/65

2.08/1.60

N/A

75/52
69.3%

135/104
77%

194/148
76.3%
57.1/73.6
169/218
.678/.672

242/181
74.8%
71.2/90
211/267
.634/.617

278/201
72.3%
81.8/100
242/296
.583/.548

315/219
69.5%
92.7/109
275/323
.55/.497

233/171
73.3%
1.48/3.37
.421/.324

AFR LT4 220 Race SF600 Alum

220/80

2.08/1.60
4.125
1 7/8" Pipe

132/112
84.8%

190/145
76.3%
55.9/72.1
166/214
.664/.659

248/185
74.6%
73/92
216/273
.65/.63

280/205
73.2%
82.4/102
244/302
.587/.559

286/215
75.2%
84.2/107
249/317
.50/.488

292/220
75.3%
85.9/109
255/324
.437/.428

238/180
75.8%
1.33/2.75
.421/.324

AFR LT4 227 Race SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

135/112
83%

192/145
75.5%
55.4/72.1
164/214
.664/.659

250/185
74%
72.2/92
214/273
.649/.63

288/205
71.2%
83.2/102
246/302
.598/.559

292/215
73.6%
84.3/107
250/317
.505/.488

295/220
74.6%
85.2/109
252/324
.438/.428

242/180
74.5%
1.30/2.75
.425/.324

AFR LT4 227 Street SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

148/114
77%

210/162
77.1%
60.6/80.6
180/239
.727/.736

259/204
78.8%
74.8/101
222/301
.672/.695

292/220
75.3%
84.3/109
250/324
.606/.60

305/229
75.1%
88.1/114
261/337
.528/.52

243/186
76.5%
1.34/2.86
.425/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

AFR LT4 227 Comp SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

N/A

151/120
79.5%

219/167
76.3%
63.2/83.1
187/246
.758/.759

266/214
80.5%
76.8/106
228/315
.69/.729

298/230
77.2%
86/114
255/339
.619/.627

318/238
74.8%
91.8/118
272/351
.55/.541

327/243
74.3%
94.4/121
280/358
.485/.473

263/202
76.8%
1.44/3.04
.425/.324

AFR LT4 227 Street 60/40 V2 SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

65-75

148/114
77%

210/162
77.1%
60.6/80.6
180/239
.727/.736

261/204
78.2%
75.4/101
223/301
.677/.695

296/220
74.3%
85.5/109
253/324
.615/.60

312/229
73.4%
90.1/114
267/337
.54/.52

318/237
74.5%
91.8/118
272/349
.472/.461

258/194
75.5%
1.40/2.96
.425/.324

AFR LT4 227 Comp 60/40 V2 SF600 Alum

227/80

2.10/1.60
4.125
1 7/8" Pipe

65-75

152/120
78.9%

212/167
78.8%
61.2/83.1
181/246
.734/.759

265/214
80.8%
76.5/106
227/315
.688/.729

300/230
76.7%
86.6/114
257/339
.623/.627

319/238
74.6%
92.1/118
273/351
.552/.541

327/243
74.3%
94.4/121
280/358
.485/.473

263/202
77%
1.44/3.04
.425/.324

AFR LT4 Ported Race Prep Alum

213/65

N/A

75/52
69.3%

135/104
77%

194/148
76.3%
-

242/181
74.8%
-

278/201
72.3%
-

315/219
69.5%
-

233/171
73.3%
1.48/3.37

AFR LT4 Ported Meaux Racing I-50 E-50 Alum

N/A

2.10/1.60
4.00
No Pipe

N/A

136/99
72.8%

197/166
84.3%
56.9/82.6
169/245
.682/.754

254/196
77.2%
73.3/97.5
217/289
.659/.668

292/216
74%
84.3/107
250/318
.606/.589

315/221
70.2%
90.9/110
269/326
.545/.502

319/226
70.8%
92.1/112
273/333
.473/.44

327/226
69.1%
94.4/112
280/333
.424/.385

263/193
73.4%
-
.425/.324

AFR LT4 Ported Meaux Racing I-50 E-50 Alum

N/A

2.10/1.60
-
No Pipe

N/A

136/99
72.8%

197/166
84.3%
56.9/82.6
169/245
.682/.754

254/196
77.2%
73.3/97.5
217/289
.659/.668

292/216
74%
84.3/107
250/318
.606/.589

315/221
70.2%
90.9/110
269/326
.545/.502

324/232
71.6%
93.5/115
277/342
.481/.452

335/234
69.9%
96.7/116
287/345
.435/.399

265/195
73.6%
-
.425/.324

Dart 180 LT1/LT4 Alum

180/-

2.02/1.60
-
No Pipe

139/114
82%

193/145
75.1%
60.2/72.1
178/214
.694/.659

231/164
71%
72.1/81.6
214/242
.623/.559

249/172
69.1%
77.7/85.5
230/253
.537/.469

253/174
68.8%
78.9/86.5
234/256
.455/.395

213/154
72.2%
1.41
.409/.324

Dart 180 LT1 Advanced Induction SF600

189.8/75

2.02/1.60
4.03
No Pipe

N/A

61/48
78.7%

124/94
75.8%

176/124
70.5%
54.9/61.7
163/183
.633/.563

222/153
68.9%
69.3/76.1
205/225
.599/.521

251/171
68.1%
78.3/85
232/252
.542/.466

264/184
69.7%
82.4/91.5
244/271
.475/.418

256/192
75%
79.9/95.5
237/283
.395/.374

216/153
71%
-
.409/.324

Dart 180 LT1 Ported Advanced Induction SF600

201/-

2.02/1.60
4.03
No Pipe

69/57
82.6%

141/104
73.8%

197/141
71.6%
61.5/70.1
182/208
.709/.64

241/168
69.7%
75.2/83.6
223/248
.65/.572

277/187
67.5%
86.4/93
256/276
.598/.51

290/200
69%
90.5/99.5
268/295
.522/.454

290/205
70.7%
90.5/102
268/302
.447/.399

239/168
70%
1.44
.409/.324

Dart 200 LT1/LT4 Alum

200/-

2.02/1.60
-
No Pipe

129/114
88.4%

185/145
78.4%
57.7/72.1
171/214
.666/.659

229/164
71.6%
71.5/81.6
212/242
.618/.559

261/172
65.9%
81.4/85.5
241/253
.563/.469

263/174
66.2%
82.1/86.5
243/256
.473/.395

213/154
72.1%
1.32
.409/.324

Dart 215 LT1/LT4 Alum

215/-

2.05/1.60
-
No Pipe

127/114
89.8%

178/145
81.5%
53.9/72.1
160/214
.631/.659

216/164
75.9%
65.4/81.6
194/242
.574/.559

249/172
69.1%
75.4/85.5
224/253
.53/.469

268/174
64.9%
81.2/86.5
241/256
.475/.395

271/-
82.1
243
.412

218/154
-
1.26
.415/.324

Edelbrock Performer LT1 61909 SF1020 Alum

170/60

1.94/1.55
-
No Pipe

61/52
85.2%

117/100
85.5%

174/140
80.5%
58.9/74.2
174/220
.652/.656

220/167
75.9%
74.4/88.5
221/262
.618/.587

242/184
76%
81.9/97.5
243/289
.544/.518

232/192
82.8%
78.5/102
233/301
.435/.45

197/157
79.5%
1.42/3.20
.393/.314

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Edelbrock Performer LT1 61909 Out of Box SF1020 GMHPMAlum

175.5./69

1.94/1.55
4.03

61/53
86.9%

121/100
82.6%

178/133
74.7%
60.2/70.5
178/209
.667/.624

220/155
70.5%
74.4/82.1
221/243
.618/.545

232/168
72.4%
78.5/89
233/264
.521/.473

228/172
75.4%
77.1/91.2
229/270
.427/.403

196/146
74.4%
-
.393/.314

Edelbrock Performer RPM Xtreme LT4 61939 Semi-CNC SF1020 Alum

195/75

2.02/1.57
4.00

65/54
83.1%

119/107
89.9%

173/145
83.8%
54/74.9
160/222
.622/.671

255/181
71%
79.6/93.5
236/277
.688/.628

267/187
70%
83.3/96.6
247/286
.576/.519

270/190
70.4%
84.3/98.1
250/291
.486/.44

217/162
74.7%
1.38/2.53
.409/.318

Patriot Alum

195/70

2.02/1.60
4.00

-
-
-
.409/.324

Pro Comp Alum

190/-

2.02/1.60

58/52
89.7%

113/98
86.7%

159/133
83.6%
49.6/66.1
147/196
.572/.604

200/162
81%
62.4/80.6
185/239
.54/.552

228/180
78.9%
71.1/89.5
211/265
.492/.491

244/189
77.5%
76.1/94
226/279
.439/.429

248/192
77.4%
77.4/95.5
229/283
.382/.374

199/159
80%
1.31
.409/.324

Trick Flow GenX LT1 21 Deg SF600

185/-

2.02/1.60
4.03

65/54
83.1%

138/117
84.8%

202/162
80.2%
63/80.6
187/239
.727/.736

243/189
77.8%
75.8/94
225/279
.656/.644

270/197
73%
84.3/98
250/290
.583/.537

273/209
76.6%
85.2/104
252/308
.491/.475

225/175
77.6%
1.48
.409/.324

Trick Flow GenX LT1 21 Deg SF600 Alum

185/67

2.02/1.60
4.03
1 3/4" Pipe

65/48
73.8%

132/111
84.1%

195/151
77.4%
60.8/75.1
180/223
.702/.686

236/182
77.1%
73.6/90.5
218/268
.637/.62

258/198
76.7%
80.5/98.5
239/292
.557/.54

260/206
79.2%
81.1/102
240/304
.468/.468

216/170
78.4%
1.41/3.07
.409/.324

Trick Flow LT1 SF600 Alum

195/72

2.02/1.60
4.03
1 3/4" Pipe

51/58
113%

136/98
72.1%

191/136
71.2%
59.6/67.6
177/200
.687/.618

230/163
70.9%
71.8/81.1
213/240
.621/.555

253/177
70%
78.9/88
234/261
.546/.482

254/190
74.8%
79.3/94.5
235/280
.457/.431

213/153
71.8%
1.30/2.64
.409/.324

Trick Flow LT1 Ported Lloyd Elliot Alum

205/76

2.02/1.60

140/108
77.1%

200/144
72%
62.4/71.6
185/212
.72/.654

245/176
71.8%
76.4/87.5
227/259
.661/.60

274/190
69.3%
85.5/94.5
253/280
.591/.518

282/204
72.3%
88/101
261/301
.507/.463

228/164
72%
1.38/2.68
.409/.324

Trick Flow LT1 Ported Lloyd Elliot Alum

208/-

2.05/1.60

142/109
76.8%

199/142
71.4%
60.3/70.6
179/209
.705/.645

243/178
73.3%
73.6/88.5
218/262
.646/.606

279/204
73.1%
84.5/101
250/301
.593/.556

292/217
74.3%
88.5/108
262/320
.518/.493

231/170
73.6%
1.40
.415/.324

Trick Flow LT1 Ported 200 Advanced Induction SF600 Alum

200/78

2.08/1.60
4.03
No Pipe

N/A

70/61
87.1%

144/107
74.3%

198/145
73.2%
58.3/72.1
173/214
.692/.659

246/175
71.1%
72.4/87
215/258
.645/.596

274/194
70.8%
80.6/96.5
239/286
.574/.529

278/203
73%
81.8/101
242/299
.486/.461

279/209
74.9%
82.1/104
243/308
.418/.407

237/172
72.8%
1.40/2.68
.421/.324

Trick Flow LT1 Ported 215 Advanced Induction SF600 Alum

215/78

2.08/1.60
4.03
No Pipe

N/A

72/65
90.3%

146/111
76%

206/149
72.3%
60.6/74.1
180/220
.72/.677

253/177
70%
74.5/88
221/261
.663/.603

285/196
68.8%
83.9/97.5
249/289
.597/.534

300/205
68.3%
88.3/102
262/302
.524/.466

304/210
69.1%
89.5/104
265/309
.455/.409

249/175
70.1%
1.41/2.69
.421/.324

Trick Flow LT1 Ported TEA Alum

205/66

2.02/1.60
4.03
Pipe 1 3/4

68/54
79.4%

143/117
81.8%

217/177
81.6%
67.7/88
201/261
.781/.804

263/219
83.3%
82.1/109
243/323
.71/.746

290/243
83.8%
90.5/121
268/358
.626/.662

294/257
87.4%
91.7/128
272/379
.529/.584

241/203
83.9%
1.43/3.89
.409/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Trick Flow LT1 Ported TEA Alum

220/66

2.08/1.60
4.03
Pipe 2"

N/A

69/52
75.4%

144/119
82.6%

207/182
87.9%
60.9/90.5
181/268
.723/.827

255/224
87.8%
75/111
222/330
.668/.763

291/247
84.9%
85.6/123
254/364
.61/.673

310/257
82.9%
91.2/128
270/379
.542/.584

316/262
82.9%
93/130
276/386
.473/.51

254/215
84.8%
1.44/3.97
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Chevy Large Valve Rockville Speed

N/A

2.02/1.60

N/A

65/51
78.5%

133/102
76.7%

163/131
80.4%
50.9/65.2
151/193
.586/.595

174/139
79.9%
54.3/69.1
161/205
.469/.474

178/141
79.2%
55.5/70.1
165/208
.384/.384

162/128
79.2%
-
.409/.324

Chevy Ported Large Valve Rockville Speed

N/A

2.02/1.60

N/A

66/52
78.8%

135/112
83%

175/152
86.9%
54.6/75.6
162/224
.63/.69

197/183
92.9%
61.5/91
182/270
.532/.623

209/184
88%
65.2/91.5
193/271
.451/.501

214/-
66.8
198
.385

186/158
-
-
.409/.324

Chevy 90 Deg LB4

N/A

1.94/1.50

N/A

165/119
72.1%
55.8/67.3
165/200
.371/.346

-
-
-
.393/.304

Chevy 90 Deg L35 Sandman

N/A

1.94/1.50

N/A

60/-

100/-

143/-
48.4
143
.536

172/-
58.2
172
.483

189/-
63.9
189
.425

194/-
65.6
194
.363

201/-
68
201
.323

167
-
-
.393/.304

Chevy 90 Deg L35 Dennis

N/A

1.94/1.50

N/A

60/-

100/-

143/-
48.4
143
.536

172/-
58.2
172
.483

189/-
63.9
189
.425

199/-
67.3
199
.373

161
-
-
.393/.304

Chevy 90 Deg L35 Ported Dennis

N/A

1.94/1.60

N/A

60/62
103%

123/121
98.4%

170/172
101%
57.5/85.5
170/253
.637/.781

207/188
90.8%
70/93.5
207/277
.582/.64

230/195
84.8%
77.8/97
231/287
.517/.531

247/199
80.6%
83.6/99
248/293
.463/.452

195/175
89.6%
-
.393/.324

Chevy 90 Deg L35 Shan Mild Ported

N/A

2.02/1.60

N/A

64/54
84.4%

122/102
83.6%

164/139
84.8%
51.2/69.1
152/205
.59/.631

197/166
84.3%
61.5/82.6
182/245
.532/.565

217/181
83.4%
67.7/90
201/267
.468/.493

218/185
84.9%
68/92
202/273
.392/.42

219/188
85.8%
68.3/93.5
202/277
.338/.366

190/160
84.5%
-
.409/.324

Chevy 90 Deg Vortec

N/A

1.94/1.50
4.00

N/A

63/49
77.8%

131/106
80.9%

187/139
74.3%
63.3/78.7
187/233
.701/.673

218/155
71.1%
73.8/87.7
219/260
.612/.563

216/163
75.5%
73.1/92.2
217/273
.485/.474

217/165
76%
73.4/93.4
218/277
.406/.40

194/146
75.1%
-
.393/.304

Chevy 90 Deg LF6 Vortec Ported

N/A

65/55
84.6%

131/125
95.4%

182/166
91.2%
-

228/184
80.7%
-

259/191
73.7%
-

200/167
83.3%

Chevy 359 / 523 18 Deg Hutter Alum

244/-

2.15/1.625

147/110
74.8%

228/162
71.1%
62.8/78.1
186/231
.771/.724

282/215
76.2%
77.7/104
230/307
.715/.721

321/235
73.2%
88.4/113
262/336
.651/.631

338/243
71.9%
93.1/117
276/347
.571/.543

347/250
72%
95.6/121
283/357
.503/.479

277/203
73.1%
1.42
.435/.329

Brodix 90 Deg V6 -8 23 Deg Alum

194/-

2.08/1.60

134/110
82.1%

191/139
72.8%
56.2/69.1
167/205
.667/.631

230/155
67.4%
67.7/77.1
201/228
.603/.528

240/161
67.1%
70.6/80.1
209/237
.503/.439

199/141
71.1%
1.24
.421/.324

Brodix 90 Deg V6 -10 23 Deg Alum

210/-

2.08/1.60

145/110
75.9%

195/139
71.3%
57.4/69.1
170/205
.681/.631

240/155
64.6%
70.6/77.1
209/228
.629/.528

253/161
63.6%
74.5/80.1
221/237
.53/.439

262/166
63.4%
77.1/82.6
228/245
.458/.377

262/168
64.1%
77.1/83.6
228/248
.392/.327

226/150
66.2%
1.25
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

Average

Brodix 90 Deg V6 18 Deg Ported Kelford Cams Alum

N/A

2.08/1.60

N/A

66/63
95.5%

130/124
95.4%

193/160
82.9%
56.8/79.6
168/236
.674/.727

245/184
75.1%
72.1/91.5
214/271
.642/.627

294/198
67.3%
86.5/98.5
256/292
.616/.54

323/204
63.2%
95.1/101
282/301
.564/.463

339/207
61.1%
99.8/103
296/305
.508/.403

254/180
70.7%
-
.421/.324

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.150

.200

.250

.300

.350

.400

.450

.500

.550

Average

4 cyl Ported Alum

N/A

35.2mm/ 30.1mm

N/A

250/-
82.9
246
.492

270/175
64.8%
89.5/79.3
265/235
.472/.358

260
-
-
.281/.240

4 cyl Ported Alum

N/A

35.2mm/ 31.1mm

N/A

250/-
82.9
246
.492

270/207
76.7%
89.5/87.9
265/260
.472/.41

260
-
-
.281/.248

2.0L LSJ M2 Race Systems Alum

N/A

35.2mm/ 30.1mm
3.575

N/A

155/127
81.9%
51.4/57.6
152/171
.61/.584

192/139
72.4%
63.6/63
189/187
.604/.511

224/144
64.3%
74.3/65.3
220/193
.587/.442

243/146
60.1%
80.6/66.2
239/196
.546/.384

253/148
58.5%
83.9/67.1
248/199
.498/.34

258/149
57.8%
85.5/67.5
253/200
.451/.305

261/149
57.1%
86.5/67.5
256/200
.411/.274

227/143
63.2%
-
.281/.240

2.0L LSJ CNC M2 Race Systems Alum

N/A

36.1mm/ 31.1mm
3.575

86/86
100%

126/126
100%

166/151
91%
52.3/64.1
155/190
.637/.672

201/173
86.1%
63.3/73.5
188/218
.617/.616

235/187
79.6%
74.1/79.4
219/235
.601/.555

263/194
73.8%
82.9/82.4
246/244
.576/.493

278/199
71.6%
87.6/84.5
260/250
.533/.443

292/203
69.5%
92/86.2
273/255
.498/.402

298/206
69.1%
93.9/87.5
278/259
.457/.367

303/208
68.6%
95.5/88.3
283/262
.423/.337

240/183
76.2%
-
.288/.248

2.2 Patriot CNC Stage II Alum

173/75

1.42/1.225

81/7
8.69%

121/109
90.1%

160/138
86.3%
50.5/58.5
150/173
.614/.614

190/160
84.2%
60/67.9
178/201
.583/.57

217/174
80.2%
68.5/73.8
203/219
.555/.516

238/181
76.1%
75.1/76.8
223/228
.522/.46

264/187
70.8%
83.4/79.3
247/235
.507/.416

266/189
71.1%
84/80.2
249/238
.454/.374

208/163
78.2%
1.54/2.52
.288/.248

Ported Shaver SF1020 Alum

181/78

35.2mm/ 30.1mm

N/A

113/116
102%

148/151
102%

181/176
97.2%
60/79.8
178/236
.712/.81

214/190
88.8%
70.9/86.1
210/255
.673/.699

242/199
82.2%
80.2/90.2
238/267
.635/.61

258/204
79.1%
85.5/92.5
253/274
.58/.536

268/206
76.9%
88.8/93.4
263/277
.527/.474

-/208

219/188
85.9%
1.48/2.64
.281/.240

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Chevy 156 Peanut Iron CHP

195/-

2.06/1.72
-
No Pipe

115

54/35
64.8%

123/84
68.3%

184/117
63.6%
55.2/50.4
164/149
.649/.494

222/141
63.5%
66.6/60.7
197/180
.587/.447

226/156
69%
67.8/67.1
201/199
.478/.395

226/160
70.8%
67.8/68.9
201/204
.399/.338

227/162
71.4%
68.1/69.7
202/207
.343/.293

201/137
67.9%
1.16
.417/.348

Chevy 236 Peanut Iron CHP

208/112

2.06/1.72
-
No Pipe

120

56/44
78.6%

125/87
69.6%

183/111
60.7%
54.9/47.8
163/142
.646/.469

215/130
60.5%
64.5/55.9
191/166
.569/.412

233/144
61.8%
69.9/62
207/184
.493/.365

235/150
63.8%
70.5/64.6
209/191
.415/.317

235/155
66%
70.5/66.7
209/198
.355/.281

204/130
63.4%
1.13/1.38
.417/.348

Chevy 236 Peanut Iron CCM

208/112

2.06/1.72
-
Pipe

120

56/44
78.6%

125/90
72%

183/117
63.9%
54.9/50.4
163/149
.646/.494

215/139
64.7%
64.5/59.8
191/177
.569/.44

233/158
67.8%
69.9/68
207/201
.493/.401

235/166
70.6%
70.5/71.4
209/212
.415/.351

235/172
73.2%
70.5/74
209/219
.355/.311

204/140
68.7%
1.13/1.54
.417/.348

Chevy 360 Small Oval Ported BH Performance Iron

N/A

N/A
-
No Pipe

N/A

75/68
90.7%

160/111
69.4%

202/143
70.8%
-

230/165
71.7%
-

247/178
72.1%
-

256/192
75%
-

255/199
78%
-

225/165
73.2%

Chevy Vortec L29 '97-99 Iron

230/-

2.070/1.72

63/49
77.8%

121/91
75.2%

165/120
72.7%
49/51.6
145/153
.579/.507

198/133
67.2%
58.8/57.2
174/170
.521/.421

226/140
61.9%
67.2/60.3
199/179
.476/.355

242/142
58.7%
71.9/61.1
213/181
.425/.30

190/125
65.8%
1.05
.419/.348

Chevy Oval Port Iron

256/114

2.06/1.72

N/A

272/189
69.5%
81.6/81.3
242/241
.48/.399

-
-
1.06/1.66
.417/.348

Chevy 049 Oval Port Iron

253/115

2.06/1.72

N/A

268-260/177
67%
79.2/76.2
235/226
.399/.321

-
-
1.04/1.54
.417/.348

Chevy 049 Oval Port SF600 CHP Iron

253/116

2.06/1.72
-
Pipe

122

59/52
88.1%

124/98
79%

188/128
68.1%
56.4/55.1
167/163
.663/.541

232/152
65.5%
69.6/65.4
206/194
.614/.482

250/177
70.8%
75/76.2
222/226
.529/.449

264/187
70.8%
79.2/80.5
235/238
.466/.395

264/192
72.7%
79.2/82.6
235/245
.399/.348

265/192
72.5%
79.5/82.6
236/245
.351/.304

227/161
71%
1.05/1.66
.417/.348

Chevy 049 Oval Ported BH Performance Iron

N/A

2.19/1.88
-
No Pipe

N/A

68-77/62
85.5%

146-158/112
73.7%

215-221/149
68.3%
57.9/53.7
171/159
.723/.576

265-260/167
63.6%
69.7/60.2
206/178
.653/.484

301-280/181
62.3%
77.1/65.2
229/193
.578/.42

303-293/194
65.1%
79.1/69.9
234/207
.494/.375

296-294/201
68.1%
78.3/72.4
232/215
.42/.333

253/167
66.2%
-
.443/.381

Chevy 049 Oval Ported BH Performance Iron

N/A

2.19/1.88
-
Pipe

N/A

68-77/67
92.4%

146-158/147
96.7%

215-221/193
88.5%
57.9/69.5
171/206
.723/.746

265-260/227
86.5%
69.7/81.8
206/242
.653/.658

301-280/245
84.3%
77.1/88.3
229/262
.578/.568

303-293/249
83.6%
79.1/89.7
234/266
.494/.481

296-294/251
85.1%
78.3/90.4
232/268
.42/.416

253/219
86.5%
-
.443/.381

Chevy 049 Oval Gamrace Iron

N/A

2.07/1.72
4.30
No Pipe

N/A

175/128
73.1%
52/55.1
154/163
.614/.541

218/140
64.2%
64.8/60.3
192/179
.574/.444

236/149
63.1%
70.1/64.1
208/190
.497/.378

251/153
61%
74.6/65.8
221/195
.441/.323

255/154
60.4%
75.8/66.3
225/196
.384/.279

227/145
63.8%
-
.419/.348

Chevy 049 Oval Ported Stage 1 Gamrace Iron

260/-

2.19/1.88
4.30
No Pipe

N/A

205/142
69.3%
54.4/51.2
161/152
.68/.549

265/169
63.8%
70.4/60.9
208/180
.66/.49

302/192
63.6%
80.2/69.2
238/205
.601/.445

302/209
69.2%
80.2/75.3
238/223
.501/.404

297/225
75.8%
78.8/81.1
234/240
.422/.373

274/187
68.3%
1.16
.443/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Chevy 049 Oval Ported Dr Js Performance Iron

N/A

2.25/1.94
4.50
2" Pipe

N/A

76/68
89.5%

152/134
88.2%

228/162
71.1%
57.3/54.8
170/162
.736/.607

271/214
79%
68.2/72.4
202/215
.656/.601

315/242
76.8%
79.2/81.9
235/243
.61/.544

341/261
76.5%
85.8/88.3
254/262
.551/.489

348/289
83%
87.5/97.8
259/290
.482/.464

276/217
78.7%
-
.456/.393

Chevy 049 Oval Ported sheetmetal Iron

N/A

2.19/1.88
4.25
No Pipe

N/A

142/110
77.5%

204/138
67.6%
54.2/49.7
160/147
.677/.533

249/166
66.7%
66.1/59.8
196/177
.62/.481

288/190
66%
76.5/68.4
227/203
.573/.441

310/200
64.5%
82.3/72
244/213
.514/.387

239/161
67.4%
-
.443/.381

Chevy 063 Oval Weingartner Racing Iron

N/A

2.06/1.74
4.31
No Pipe

N/A

65-59/45
72.6%

114-106/86
78.2%

178-173/115
65.5%
52.7/48.4
156/143
.619/.48

234-215/137
61%
67.4/57.6
200/171
.594/.429

248-229/153
64.2%
71.6/64.3
212/191
.505/.383

260-247/166
65.5%
76.1/69.8
225/207
.447/.347

273-255/175
66.3%
79.2/73.6
235/218
.399/.313

270-256/180
68.4%
78.9/75.7
234/224
.348/.282

218/145
66.2%
-
.417/.352

Chevy 063 '69 Oval Chris Straub Iron

N/A

2.07/1.72
4.50

N/A

117/97
82.9%

180/123
68.3%
53.5/52.9
158/157
.632/.52

228/145
63.6%
67.7/62.4
201/185
.60/.459

248/164
66.1%
73.7/70.6
218/209
.522/.416

265/176
66.4%
78.7/75.7
233/224
.465/.372

270/183
67.8%
80.2/78.8
238/233
.406/.331

218/148
67.9%
-
.419/.348

Chevy 063 '69 Oval Chris Straub Iron

N/A

2.19/1.88
4.50

N/A

138-132/96
71.1%

202-198/123
61.5%
53.1/44.3
157/131
.664/.475

243-239/153
63.5%
64/55.1
190/163
.60/.444

272-271/175
64.5%
72.1/63
214/187
.541/.406

295-291/196
66.9%
77.8/70.6
230/209
.486/.379

293-290/215
73.8%
77.4/77.5
229/229
.415/.356

239/160
66.9%
-
.443/.381

Chevy 063 '69 Oval Chris Straub Ported Foxwell Motorsports Iron

N/A

2.19/1.80
4.50
2 1/4" Pipe

N/A

156-153/116
75.1%

216-215/150
69.6%
57.2/58.9
170/175
.715/.606

265-260/174
66.3%
69.7/68.4
206/203
.653/.527

307-290/200
67%
79.2/78.6
235/233
.594/.484

333-305/220
69%
84.7/86.5
251/256
.529/.444

327-310/242
76%
84.6/95.1
251/282
.453/.419

261/184
70.3%
-
.443/.365

Chevy 3931063 Oval Dr Js Performance Iron

N/A

2.06/1.74
-
Pipe

N/A

65/55
84.6%

117/97
82.9%

180/123
68.3%
54/51.7
160/153
.635/.514

228/145
63.6%
68.4/61
203/181
.603/.454

248/164
66.1%
74.4/69
220/204
.525/.411

265/176
66.4%
79.5/74
236/219
.467/.368

270/183
67.8%
81/77
240/228
.408/.328

218/148
67.9%
-
.417/.352

Chevy 3931063 Oval Ported Dr Js Performance Iron

N/A

2.19/1.88
-
Pipe

N/A

75/74
98.7%

150/134
89.3%

219/162
74%
58.1/58.4
172/173
.727/.626

266/206
77.4%
70.6/74.2
209/220
.662/.597

304/232
76.3%
80.7/83.6
239/248
.605/.538

321/249
77.6%
85.2/89.7
252/266
.533/.481

327/260
79.5%
86.8/93.7
257/278
.465/.431

265/207
78.3%
-
.443/.381

Chevy 088 Ported Chad Speier SF600 Iron

N/A

2.30/1.88
4.50
No Pipe

N/A

156-157/132
84.3%

232-229/163
70.7%
55.5/58.7
164/174
.728/.63

286-278/188
66.7%
67.9/67.7
201/201
.668/.545

328-314/207
64.5%
77.3/74.6
229/221
.609/.48

363-335/220
63%
84/79.3
249/235
.551/.425

380-353/231
63%
88.2/83.2
261/247
.496/.383

382-365/240
64.3%
89.9/86.5
266/256
.443/.348

385-371/248
65.6%
91/89.3
270/265
.398/.32

387-377/251
65.7%
91.9/90.4
272/268
.362/.291

315/209
66.2%
-
.466/.381

Chevy 290 Oval Port Iron CHP

253/112

2.06/1.72
-
No Pipe

105

60/47
78.3%

122/88
72.1%

172/113
65.7%
51.6/48.6
153/144
.607/.477

214/133
62.1%
64.2/57.2
190/170
.566/.421

244/152
62.3%
73.2/65.4
217/194
.516/.385

257/161
62.6%
77.1/69.3
228/205
.453/.34

260/168
64.6%
78/72.3
231/214
.393/.304

263/171
65%
78.9/73.6
234/218
.348/.271

219/141
64.4%
1.04/1.53
.417/.348

Chevy 290 Oval Port Iron CHP

253/112

2.06/1.72
-
Pipe

105

60/47
78.3%

122/90
73.8%

172/118
68.6%
51.6/50.8
153/150
.607/.499

214/138
64.5%
64.2/59.4
190/176
.566/.437

244/160
65.6%
73.2/68.9
217/204
.516/.406

257/174
67.7%
77.1/74.9
228/222
.453/.368

260/184
70.8%
78/79.2
231/235
.393/.333

263/188
71.5%
78.9/80.9
234/240
.348/.298

219/150
68.7%
1.04/1.68
.417/.348

Chevy 290 Oval Port Ported Ron Miller SF120 Iron

N/A

2.19/1.88
4.50
No Pipe

98.2

151-152/130
85.8%

215-162/157
83.3%
50/56.6
148/168
.626/.607

263-259/191
73.2%
69.3/68.8
205/204
.65/.554

288-275/215
76.4%
74.7/77.5
221/229
.56/.499

312-293/240
79.3%
80.3/86.5
238/256
.502/.464

326-291/243
78.8%
81.9/87.5
243/259
.439/.403

249/196
78.7%
-
.443/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Chevy 390 Oval NPS Stock Iron

N/A

2.065/1.72
4.25
No Pipe

N/A

69/46
66.7%

116/89
76.7%

180/114
63.3%
53.7/49.1
159/145
.633/.482

216/136
63%
64.5/58.5
191/173
.57/.431

236/155
65.7%
70.5/66.7
209/198
.498/.393

248/171
69%
74/73.6
219/218
.436/.361

260/180
69.2%
77.6/77.5
230/230
.392/.326

209/141
67.3%
-
.418/.348

Chevy 390 Oval Pace Performance Alum

290/110

2.25/1.88

110

71/58
81.7%

138/119
86.2%

193/145
75.1%
48.5/52.2
144/155
.623/.561

233/168
72.1%
58.6/60.5
174/179
.564/.487

272/189
69.5%
68.4/68.1
203/202
.527/.438

299/202
67.6%
75.2/72.8
223/216
.483/.39

318/210
66%
80/75.7
237/224
.44/.348

327/230
70.3%
82.2/82.9
244/245
.396/.333

254/180
71%
1.13/2.09
.456/.381

Chevy 390 Oval SF600 Alum

290/110

2.25/1.88
4.50
1 7/8" Pipe

110

74/71
95.9%

143/126
88.1%

207/158
76.3%
52.1/56.9
154/169
.669/.611

250/178
71.2%
62.9/64.1
186/190
.606/.516

284/200
70.4%
71.4/72
212/213
.55/.464

309/218
70.6%
77.7/78.5
230/233
.499/.421

322/232
72%
81/83.6
240/248
.446/.384

253/185
73.4%
1.11/2.11
.456/.381

Chevy 390 Oval Ported SF600 Alum

N/A

2.25/1.88
4.50
1 7/8" Pipe

112

85/73
85.9%

161/141
87.6%

230/175
76.1%
57.8/63
171/187
.743/.676

283/208
73.5%
71.2/74.9
211/222
.686/.603

332/234
70.5%
83.5/84.3
247/250
.643/.543

354/257
72.6%
89/92.6
264/274
.572/.497

361/274
75.9%
90.8/98.7
269/292
.50/.454

363/287
79.1%
91.3/103
271/306
.44/.416

298/225
75.6%
-
.456/.381

Chevy 392 / 399 Oval Alum

290/110

2.19/1.88

110

-
-
-
.443/.381

Chevy 702 Oval Port Iron CHP

253/-

2.06/1.72
-
Pipe

101

57/46
80.7%

121/89
73.6%

179/115
64.2%
53.7/49.5
159/147
.631/.486

214/135
63.1%
64.2/58.1
190/172
.566/.428

237/152
64.1%
71.1/65.4
211/194
.502/.385

254/173
68.1%
76.2/74.5
226/221
.448/.365

260/183
70.4%
78/78.8
231/233
.393/.331

260/188
72.3%
78/80.9
231/240
.344/.298

218/148
67.9%
1.03
.417/.348

Chevy 702 Oval Weingartner Ported Pocket Iron

N/A

2.19/1.88
4.50

N/A

82/64
78%

146/104
71.2%

232/127
54.7%
61.6/45.8
182/136
.77/.491

274/154
56.2%
72.7/55.5
216/164
.682/.446

295/180
61%
78.3/64.8
232/192
.587/.417

311/204
65.6%
82.6/73.5
245/218
.516/.394

306/215
70.3%
81.2/77.5
241/229
.435/.356

292/229
78.4%
77.5/82.5
230/244
.363/.332

265/173
65.4%
-
.443/.381

Chevy 702 Oval Ported I-33 E-33 Back Cut Weingartner Racing Brez

N/A

2.19/1.88
4.31
No Pipe

N/A

180/121
67.2%

247/146
59.1%
65.6/52.6
194/156
.82/.564

283/173
61.1%
75.1/62.3
223/185
.704/.502

307/197
64.2%
81.5/71
241/210
.611/.457

314/211
67.2%
83.4/76
247/225
.521/.408

314/223
71%
83.4/80.3
247/238
.447/.369

274/179
65.1%
-
.443/.381

Chevy 772 Oval Short Runner Weingartner Racing

N/A

2.19/1.88
4.50
No Pipe

N/A

63/56
88.9%

157/106
67.5%

215/139
64.7%
57.1/50.1
169/148
.713/.537

259/165
63.7%
68.8/59.4
204/176
.645/.478

251/180
71.7%
66.6/64.8
197/192
.50/.417

268/184
68.7%
71.1/66.3
211/196
.445/.356

274/187
68.2%
72.7/67.4
216/200
.39/.31

275/188
68.4%
73/67.7
216/201
.342/.273

243/164
67.6%
-
.443/.381

Chevy 781 Oval Bill Jones Iron

N/A

2.06/1.72
-
No Pipe

N/A

69/57
82.6%

142/103
72.5%

190/127
66.8%
57/54.7
169/162
.67/.537

217/158
72.8%
65.1/68
193/201
.574/.501

238/179
75.2%
71.4/77
212/228
.504/.454

270/197
73%
81/84.8
240/251
.476/.416

211/153
72.3%
-
.417/.348

Chevy 781 Oval Mild Porting Bill Jones Iron

N/A

2.06/1.72
-
No Pipe

N/A

69/62
89.9%

142/115
81%

203/152
74.9%
60.9/65.4
180/194
.716/.642

243/187
77%
72.9/80.5
216/238
.643/.593

265/207
78.1%
79.5/89.1
236/264
.561/.525

279/216
77.4%
83.7/93
248/275
.492/.456

226/175
77.5%
-
.417/.348

Chevy 781 Oval Bowl Blend Iron

258/116

2.19/1.88
4.31
No Pipe

N/A

69/69
100%

142/110
77.5%

210/140
66.7%
55.7/50.4
165/149
.697/.541

256/166
64.8%
68/59.8
201/177
.637/.481

285/180
63.2%
75.7/64.8
224/192
.567/.417

276/188
68.1%
73.3/67.7
217/201
.458/.363

234/157
67.1%
1.10/1.62
.443/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Chevy 781 Oval Bowl Blend Wolfplace FlowData Iron

N/A

2.19/1.88
4.53
No Pipe

N/A

69/56
81.2%

158/102
64.6%

217/135
62.2%
57.6/48.6
171/144
.72/.522

254/161
63.4%
67.4/58
200/172
.632/.467

263/186
70.7%
69.8/67
207/199
.524/.431

274/209
76.3%
72.7/75.3
216/223
.455/.404

272/219
80.5%
72.2/78.9
214/234
.387/.363

240/169
70.4%
-
.443/.381

Chevy 781 Oval Ported Iron

N/A

2.19/1.84

N/A

324/288
88.9%
86/108
255/321
.461/.487

-
-
-
.443/.373

Chevy 781 Oval Dave Vandenburg Mild Port Bowl Blend Iron

N/A

2.25/1.88

N/A

73/61
83.6%

140/108
77.1%

211/139
65.9%
53.1/50.1
157/148
.682/.537

273/165
60.4%
68.7/59.4
203/176
.661/.478

305/186
61%
76.7/67
227/199
.591/.431

315/202
64.1%
79.2/72.8
235/216
.509/.39

301/216
71.8%
75.7/77.8
224/231
.417/.358

258/169
65.8%
-
.456/.381

Chevy 781 Oval Short Runner Weingartner Racing Iron

N/A

2.19/1.88
4.50
No Pipe

N/A

68/57
83.8%

153/111
72.5%

215/137
63.7%
57.1/49.4
169/146
.713/.53

257/151
58.8%
68.2/54.4
202/161
.64/.438

254/158
62.2%
67.4/56.9
200/169
.506/.366

264/159
60.2%
70.1/57.3
208/170
.438/.307

263/163
62%
69.8/58.7
207/174
.374/.27

267/163
61%
70.9/58.7
210/174
.332/.236

239/149
62.3%
-
.443/.381

Chevy 781 Ported Dr Js Performance I-50 E-45 Iron

N/A

2.30/1.90
-
2" Pipe

N/A

66-63/68
105%

148-143/132
90.7%

228-225/161
71.1%
54.5/56.8
162/168
.716/.616

294-291/212
72.5%
70.4/74.8
209/222
.693/.608

335-333/240
71.9%
80.4/84.6
238/251
.633/.551

354-348/259
73.8%
84.5/91.3
250/271
.555/.495

363-352/268
75%
86/94.5
255/280
.484/.439

372-358/274
75.1%
87.9/96.6
260/286
.432/.393

375-364/277
75%
88.9/97.7
264/289
.389/.353

381-370/279
74.3%
90.4/98.4
268/292
.356/.32

313/234
74.6%
-
.466/.385

Chevy 820 Weingartner Racing Brez

N/A

2.19/1.88
4.31
No Pipe

N/A

145/132
91%

207/166
80.2%
55/59.8
163/177
.687/.642

256/193
75.4%
68/69.5
201/206
.637/.56

295/201
68.1%
78.3/72.4
232/215
.587/.466

308/214
69.5%
81.8/77.1
242/228
.511/.414

301/221
73.4%
79.9/79.6
237/236
.428/.366

252/188
74.5%
-
.443/.381

Chevy 820 Bowl Ported Weingartner Racing Brez

N/A

2.25/1.88
4.31
No Pipe

N/A

156/-

220/-
55.3
164
.711

273/-
68.7
203
.661

295/-
74.2
220
.572

315/-
79.2
235
.509

337/-
84.8
251
.466

350/-
88
261
.424

278
-
-
.456/.381

Chevy 3993820 Oval

253/114

113

71/52
73.2%

145/105
72.4%

227/144
63.4%
-

260/176
67.7%
-

279/190
68.1%
-

228/154
67.5%
1.10/1.67

Chevy 074 Ported Mike Stark Seanz 680 Alum

340/-

2.30/1.88
4.60

N/A

81/75
92.6%

166/119
71.7%

248/157
63.3%
59.7/56.6
177/168
.784/.607

312/191
61.2%
75.1/68.8
223/204
.739/.554

354/210
59.3%
85.2/75.7
252/224
.671/.487

378/233
61.6%
91/83.9
270/249
.597/.45

392/255
65.1%
94.3/91.9
280/272
.531/.422

400/272
68%
96.3/98
285/290
.474/.394

400/280
70%
96.3/101
285/299
.421/.361

331/215
64.8%
1.18
.466/.381

Chevy 188 Iron CHP

317/125

2.19/1.88
4.25
Pipe

118

68/45
66.2%

129/90
69.8%

188/131
69.7%
49.9/47.2
148/140
.624/.506

233/170
73%
61.9/61.2
183/181
.58/.493

259/188
72.6%
68.8/67.7
204/201
.516/.436

291/195
67%
77.3/70.2
229/208
.483/.377

313/200
63.9%
83.1/72
246/213
.445/.331

-/202

236/162
68.9%
0.99/1.60
.443/.381

Chevy 188 Iron CHP

317/125

2.19/1.88
4.25
No Pipe

118

68/45
66.2%

129/88
68.2%

188/128
68.1%
49.9/46.1
148/137
.624/.495

233/154
66.1%
61.9/55.5
183/164
.58/.446

259/172
66.4%
68.8/62
204/184
.516/.399

291/177
60.8%
77.3/63.8
229/189
.483/.342

313/181
57.8%
83.1/65.2
246/193
.445/.30

236/150
63.7%
0.99/1.45
.443/.381

Chevy 188 Young Performance Marine Iron

N/A

2.19/1.88
4.50
No Pipe

118

149/117
78.5%

197/150
76.1%
52.3/54
155/160
.654/.58

233/174
74.7%
61.9/62.7
183/186
.58/.504

258/184
71.3%
68.5/66.3
203/196
.514/.427

280/187
66.8%
74.3/67.4
220/200
.465/.361

287/187
65.2%
76.2/67.4
226/200
.408/.31

234/167
71.2%
-
.443/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Chevy 188 Young Performance Marine Ported Iron

N/A

2.19/1.88
4.50
No Pipe

118

150/117
78%

204/151
74%
54.2/54.4
160/161
.677/.584

246/180
73.2%
65.3/64.8
194/192
.612/.522

278/192
69.1%
73.8/69.2
219/205
.554/.445

303/197
65%
80.4/71
238/210
.503/.381

311/197
63.3%
82.6/71
245/210
.442/.326

249/172
69.3%
-
.443/.381

Chevy 188 Jim V right hand port Iron

N/A

2.19/1.88
-
No Pipe

N/A

148/101
68.2%

213/135
63.4%
56.5/48.6
168/144
.707/.522

250/162
64.8%
66.4/58.4
197/173
.622/.47

287/176
61.3%
76.2/63.4
226/188
.571/.408

317/182
57.4%
84.2/65.6
249/194
.526/.352

328/186
56.7%
87.1/67
258/199
.466/.308

257/157
61%
-
.443/.381

Chevy 291 Rect. M Chips Iron

N/A

2.19/1.88

N/A

65/55
84.6%

147/110
74.8%

211/143
67.8%
56/51.5
166/153
.70/.553

245/172
70.2%
65/62
193/184
.61/.499

266/195
73.3%
70.6/70.2
209/208
.53/.452

284/209
73.6%
75.4/75.3
223/223
.471/.404

299/220
73.6%
79.4/79.3
235/235
.425/.364

242/175
72.2%
-
.443/.381

Chevy 291 Rect. Weingartner Racing Brez Iron

N/A

2.19/1.88
4.31
No Pipe

N/A

141/112
79.4%

207/139
67.1%
55/50.1
163/148
.687/.537

251/163
64.9%
66.6/58.7
197/174
.625/.473

288/180
62.5%
76.5/64.8
227/192
.573/.417

289/194
67.1%
76.7/69.9
227/207
.48/.375

291/197
67.7%
77.3/71
229/210
.414/.326

245/164
67.1%
-
.443/.381

Chevy 291 Rect. Weingartner Racing Iron

N/A

2.19/1.72
4.50
No Pipe

N/A

67/54
80.6%

137/104
75.9%

205/132
64.4%
54.4/56.8
161/168
.68/.558

248/156
62.9%
65.8/67.1
195/199
.617/.494

287/174
60.6%
76.2/74.9
226/222
.571/.441

319/182
57.1%
84.7/78.3
251/232
.529/.384

323/187
57.9%
85.7/80.5
254/238
.459/.339

253/156
61.6%
-
.443/.348

Chevy 401 CHP

322/120

2.25/1.88
4.25
Pipe

118

70/53
75.7%

143/116
81.1%

200/142
71%
50.3/51.2
149/152
.646/.549

236/179
75.8%
59.4/64.5
176/191
.572/.519

275/204
74.2%
69.2/73.5
205/218
.533/.473

310/227
73.2%
78/81.8
231/242
.501/.439

330/244
73.9%
83/87.9
246/260
.457/.404

340/254
74.7%
85.5/91.5
253/271
.412/.368

262/195
74.5%
1.06/2.12
.456/.381

Chevy 840 Rect. Weingartner Racing Brez

N/A

2.19/1.72
4.31
No Pipe

N/A

65/60
92.3%

137/107
78.1%

195/137
70.3%
51.8/59
153/175
.647/.579

244/159
65.2%
64.8/68.4
192/203
.607/.504

283/176
62.2%
75.1/75.7
223/224
.563/.446

307/185
60.3%
81.5/79.6
241/236
.509/.391

312/192
61.5%
82.8/82.6
245/245
.444/.348

246/159
64.7%
-
.443/.348

Chevy 990 Iron CHP

318/125

2.19/1.88
4.25
Pipe

118

69/53
76.8%

125/103
82.4%

183/140
76.5%
48.6/50.4
144/149
.607/.541

233/176
75.5%
61.9/63.4
183/188
.58/.51

264/198
75%
70.1/71.3
208/211
.526/.459

292/204
69.9%
77.5/73.5
230/218
.484/.394

-/207

219/164
74.8%
0.92/1.63
.443/.381

Chevy 990 Meaux Racing Iron

N/A

2.19/1.88
4.28
Pipe

N/A

131-129/106
81.5%

202-201/138
68.5%
53.5/49.7
158/147
.669/.533

234-228/162
70.1%
61.3/58.4
182/173
.575/.47

272-250/181
69.3%
69.3/65.2
205/193
.52/.42

303-275/194
67.1%
76.7/69.9
227/207
.48/.375

322-289/197
64.5%
81.1/71
240/210
.434/.326

236/163
69%
-
.443/.381

Chevy 990 Bowls Blended Josh Iron

N/A

2.25/1.88
-
No Pipe

N/A

72/59
81.9%

143/113
79%

215/139
64.7%
54.1/50.1
160/148
.694/.537

261/165
63.2%
65.6/59.4
194/176
.632/.478

290/186
64.1%
72.9/67
216/199
.562/.431

306/204
66.7%
77/73.5
228/218
.494/.394

323/213
65.9%
81.2/76.7
241/227
.447/.353

333/216
64.9%
83.8/77.8
248/231
.403/.313

267/177
66.1%
-
.456/.381

Chevy 990 Rect. VJ Bowl Cutter I-33 E-33 Back Cut Weingartner Racing Brez

N/A

2.19/1.88
4.31
No Pipe

N/A

183/122
66.7%

245/152
62%
65/54.8
193/162
.813/.588

290/176
60.7%
77/63.4
228/188
.722/.51

317/198
62.5%
84.2/71.3
249/211
.631/.459

329/208
63.2%
87.3/74.9
259/222
.546/.402

338/213
63%
89.7/76.7
266/227
.481/.353

341/213
62.5%
90.5/76.7
268/227
.424/.309

292/183
62.8%
-
.443/.381

Chevy 920 Rect. Iron

N/A

2.19/1.88

118

-
-
-
.443/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Chevy Rect. Port

320-326/ 120

2.19/1.88

118

331/201
60.7%
87.9/72.4
260/215
.549/.388

-
-
-
.443/.381

Chevy 410 Rect. Alum

300-315/ 110

2.19/1.88

118

-
-
-
.443/.381

Chevy 400 Rect. Alum

300-315/ 110

2.25/1.88

118

-
-
-
.456/.381

Chevy ZL-1 D-port

320/120

2.19/1.88

N/A

331/213
64.4%
87.9/76.7
260/227
.549/.412

-
-
1.03/1.78
.443/.381

Chevy Alum D-port

320/120

2.19/1.88

N/A

284/206
72.5%
75.4/74.2
223/220
.565/.478

310/226
72.9%
82.3/81.4
244/241
.514/.437

328/238
72.6%
87.1/85.7
258/254
.466/.394

307/223
72.7%
1.03/1.98
.443/.381

Chevy 14011076 Ported BH Performance Alum

N/A

2.25/1.92
-
No Pipe

N/A

78/75
96.2%

155/119
76.8%

227/151
66.5%
57.1/52.2
169/155
.733/.572

274/182
66.4%
68.9/62.9
204/186
.664/.517

304/206
67.8%
76.5/71.1
227/211
.589/.468

335/228
68.1%
84.3/78.7
250/233
.541/.431

361/236
65.4%
90.8/81.5
269/242
.50/.383

276/187
67.8%
-
.456/.389

Chevy Bowtie Weingartner Racing Ported Brez

N/A

2.19/1.88
4.31
No Pipe

N/A

170/131
77.1%

241/163
67.6%
64/58.7
190/174
.80/.63

275/186
67.6%
73/67
216/199
.684/.539

307/208
67.8%
81.5/74.9
241/222
.611/.482

336/224
66.7%
89.2/80.7
264/239
.557/.433

358/235
65.6%
95/84.7
282/251
.509/.389

373/245
65.7%
99/88.3
293/262
.464/.355

294/199
67.6%
-
.443/.381

GM PS 2000 - Darin Morgan SF600 Alum

N/A

2.48/1.85
-
No Pipe

N/A

138/125
90.6%

218/175
80.3%
45.1/65.1
134/193
.639/.687

291/212
72.9%
60.2/78.9
178/234
.64/.625

372/251
67.5%
77/93.4
228/277
.654/.592

441/285
64.6%
91.3/106
271/314
.646/.56

495/311
62.8%
102/116
304/343
.622/.524

531/325
61.2%
110/121
326/358
.584/.479

547/333
60.9%
113/124
336/367
.534/.436

548/336
61.3%
113/125
336/370
.482/.396

398/261
65.7%
-
.502/.375

GM PS 2002 - Darin Morgan SF600 Alum

N/A

2.50/1.82
-
No Pipe

N/A

155/114
73.5%

247/177
71.7%
50.3/68
149/202
.718/.707

343/222
64.7%
69.9/85.3
207/253
.748/.665

423/263
62.2%
86.2/101
255/300
.738/.63

494/301
60.9%
101/116
298/343
.718/.601

532/319
60%
108/123
321/363
.663/.546

542/334
61.6%
110/128
327/380
.591/.50

551/345
62.6%
112/133
333/393
.534/.459

561/349
62.2%
114/134
339/397
.489/.418

428/269
63%
-
.506/.369

GM / DRCE PS Alum

N/A

2.515/-

N/A

144/-

251/-
50.5
150
.725

336/-
67.6
200
.728

410/-
82.5
245
.711

475/-
95.6
283
.686

530/-
107
316
.656

545/-
110
325
.591

575/-
116
343
.554

580/-
117
346
.503

427
-
-
.509

GM / DRCE 1 PS 2004 - Darin Morgan SF600 Alum

N/A

2.50/1.80
-
No Pipe

N/A

143/110
76.9%

250/167
66.8%
50.9/65.6
151/194
.727/.674

340/210
61.8%
69.3/82.5
205/245
.741/.636

422/252
59.7%
86/99
255/293
.736/.61

487/299
61.4%
99.2/117
294/348
.708/.604

531/323
60.8%
108/127
321/376
.662/.559

555/336
60.5%
113/132
335/391
.605/.509

571/342
59.9%
116/134
345/398
.553/.46

585/348
59.5%
119/137
353/405
.51/.422

432/265
61.5%
-
.506/.365

GM / DRCE 2 Pro Stock Ported MBE Alum

487/-

2.54/1.80
4.52
No Pipe

N/A

152/117
77%

244/162
66.4%
48.2/63.7
143/189
.698/.654

329/211
64.1%
64.9/82.9
192/246
.706/.639

411/263
64%
81.1/103
240/306
.706/.637

474/306
64.6%
93.5/120
277/356
.678/.618

512/327
63.9%
101/129
299/381
.628/.566

538/340
63.2%
106/134
315/396
.577/.515

550/346
62.9%
109/136
322/403
.525/.466

562/347
61.7%
111/136
329/404
.482/.42

565/349
61.8%
112/137
330/406
.441/.384

434/277
63.8%
1.16
.514/.365

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

GM / DRCE 3 - Ported Alum

N/A

2.55/1.83

N/A

149/119
79.9%

246/176
71.5%
48.2/66.9
143/198
.701/.699

350/223
63.7%
68.5/84.8
203/251
.748/.664

429/267
62.2%
84/102
249/301
.734/.636

500/307
61.4%
97.9/117
290/346
.712/.61

544/331
60.8%
107/126
316/373
.664/.563

569/344
60.5%
111/131
330/388
.608/.512

584/354
60.6%
114/135
339/399
.555/.469

600/360
60%
117/137
348/406
.513/.429

441/276
62.5%
-
.516/.371

GM / DRCE 3 - Darin Morgan SF600 Alum

N/A

2.55/1.83
-
No Pipe

N/A

147/95
64.6%

252/168
66.7%
49.3/63.9
146/189
.718/.667

343/216
63%
67.2/82.1
199/243
.733/.643

429/260
60.6%
84/98.9
249/293
.734/.62

500/295
59%
97.9/112
290/332
.712/.586

550/316
57.5%
108/120
319/356
.672/.538

573/333
58.1%
112/127
332/375
.612/.496

583/343
58.8%
114/130
338/386
.554/.454

595/350
58.8%
117/133
345/394
.509/.417

441/264
59.8%
-
.516/.371

GM / DRCE 3 - Darin Morgan SF600 Alum

N/A

2.55/-

N/A

154/-

258/-
50.5
150
.735

345/-
67.6
200
.737

425/-
83.2
247
.727

494/-
96.7
287
.704

553/-
108
321
.675

587/-
115
341
.627

598/-
117
347
.568

602/-
118
349
.515

605/-
118
351
.47

462
-
-
.516

GM / Pro Mod 5.2 BS - Darin Morgan SF600 Alum

N/A

2.60/1.95
-
No Pipe

N/A

182/160
87.9%

267/222
83.1%
50.3/74.3
149/220
.746/.827

351/286
81.5%
66.1/95.8
196/284
.736/.799

419/338
80.7%
78.9/113
234/335
.703/.756

492/358
72.8%
92.7/120
275/355
.688/.667

543/367
67.6%
102/123
303/364
.65/.586

585/371
63.4%
110/124
326/368
.613/.518

607/371
61.1%
114/124
339/368
.566/.461

606/374
61.7%
114/125
338/371
.508/.418

450/316
70.3%
-
.527/.395

AFR 265 Oval SF600 Alum

265/115

2.19/1.88
4.31
2 1/8" Pipe

119

165/135
81.8%

244/169
69.3%
64.8/60.9
192/180
.81/.653

297/219
73.7%
78.8/78.9
234/234
.739/.635

324/249
76.9%
86/89.7
255/266
.645/.578

332/272
81.9%
88.1/98
261/290
.551/.526

272/209
76.7%
1.25/2.37
.443/.381

AFR 265 Oval Partially Ported SF600 Alum

265/115

2.19/1.88
4.31
2 1/8" Pipe

112

154/127
82.5%

218/164
75.2%
57.9/59.1
171/175
.723/.634

278/200
71.9%
73.8/72
219/213
.692/.58

323/230
71.2%
85.7/82.9
254/245
.643/.533

347/255
73.5%
92.1/91.9
273/272
.576/.493

264/195
73.9%
1.31/2.22
.443/.381

AFR 265 Oval CNC Chamber Partially Ported SF600 Alum

265/115

2.19/1.88
4.31
2 1/8" Pipe

112

172/157
91.3%

245/195
79.6%
65/70.2
193/208
.813/.754

295/227
76.9%
78.3/81.8
232/242
.734/.658

326/253
77.6%
86.5/91.1
256/270
.649/.587

342/265
77.5%
90.8/95.5
269/283
.567/.512

276/219
79.5%
1.29/2.30
.443/.381

AFR 265 CNC Chamber Wolfplace FlowData Alum

265/-

2.19/1.88
4.53
No Pipe

N/A

76/64
84.2%

168/144
85.7%

252/196
77.8%
66.9/70.6
198/209
.836/.758

307/232
75.6%
81.5/83.6
241/248
.764/.673

339/248
73.2%
90/89.3
267/265
.675/.575

351/254
72.4%
93.2/91.5
276/271
.582/.491

283/215
75.8%
1.32
.443/.381

AFR 290 Oval SF600 Alum

290/115

2.25/1.88
4.31
2 Pipe

121

170/157
92.4%

241/190
78.8%
60.6/68.4
180/203
.778/.734

294/232
78.9%
73.9/83.6
219/248
.712/.673

332/260
78.3%
83.5/93.7
247/278
.643/.603

361/278
77%
90.8/100
269/297
.583/.537

374/292
78.1%
94.1/105
279/312
.518/.484

295/235
79.5%
1.29/2.54
.456/.381

AFR 290 Oval SF600 Alum

290/115

2.25/1.88
4.31
1 7/8" Pipe

112

170/138
81.2%

240/199
82.9%
60.4/71.7
179/212
.775/.769

294/239
81.3%
73.9/86.1
219/255
.712/.693

332/268
80.7%
83.5/96.5
247/286
.643/.622

361/283
78.4%
90.8/102
269/302
.583/.547

374/298
79.7%
94.1/107
279/318
.518/.494

295/238
80.5%
1.29/2.59
.456/.381

AFR 290 Oval CNC Weingartner Racing Brez

N/A

2.25/1.88
4.31
No Pipe

N/A

79/67
84.8%

167/141
84.4%

242/212
87.6%
60.9/76.4
180/226
.782/.82

298/242
81.2%
74.9/87.2
222/258
.722/.702

328/267
81.4%
82.5/96.2
244/285
.636/.619

356/274
77%
89.5/98.7
265/292
.575/.53

370/279
75.4%
93.1/101
276/298
.512/.462

294/236
80.4%
-
.456/.381

AFR 290 Oval Alum

290/115

2.25/1.88
4.31
1 7/8" Pipe

113

170/135
79.4%

240/190
79.2%
60.4/68.4
179/203
.775/.734

294/234
79.6%
73.9/84.3
219/250
.712/.678

332/265
79.8%
83.5/95.5
247/283
.643/.615

361/280
77.6%
90.8/101
269/299
.583/.541

374/295
78.9%
94.1/106
279/315
.518/.489

295/233
79%
1.29/2.57
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

AFR 300 Oval Alum

300/-

2.30/1.88
4.31
1 7/8" Pipe

113

165/135
81.8%

240/190
79.2%
57.8/68.4
171/203
.758/.734

296/234
79.1%
71.2/84.3
211/250
.701/.678

340/265
77.9%
81.8/95.5
242/283
.645/.615

378/280
74.1%
91/101
270/299
.597/.541

388/295
76%
93.4/106
277/315
.525/.489

301/233
77.4%
1.29
.466/.381

AFR 305 SF600 Alum

305/-

2.19/1.88
4.60
2 1/8" Pipe

119

154/131
85.1%

223/176
78.9%
59.2/63.4
175/188
.74/.68

287/219
76.3%
76.2/78.9
226/234
.714/.635

335/251
74.9%
88.9/90.4
264/268
.667/.582

363/276
76%
96.4/99.4
286/295
.602/.533

272/211
77.3%
1.19
.443/.381

AFR 305 CNC Chambers SF600 Alum

305/-

2.19/1.88
4.60
2 1/8" Pipe

121

163/135
82.8%

241/192
79.7%
64/69.2
190/205
.80/.742

300/237
79%
79.6/85.4
236/253
.747/.687

344/268
77.9%
91.3/96.5
271/286
.685/.622

367/284
77.4%
97.4/102
289/303
.609/.549

368/298
81%
97.7/107
289/318
.523/.494

297/236
79.3%
1.21
.443/.381

AFR 305 CNC Chambers Partially Ported SF600 Alum

305/-

2.19/1.88
4.31
2 1/8" Pipe

121

168/142
84.5%

242/187
77.3%
64.2/67.4
190/200
.803/.723

303/225
74.3%
80.4/81.1
238/240
.754/.652

339/252
74.3%
90/90.8
267/269
.675/.584

360/271
75.3%
95.6/97.6
283/289
.597/.524

282/215
76.3%
1.18
.443/.381

AFR 305 VJ Bowl Work Foxwell Motorsports Alum

N/A

2.25/1.88
4.50
2 1/4" Pipe

N/A

169-172/150
88%

246-247/196
79.5%
62/70.6
184/209
.796/.758

305-300/239
79%
76.1/86.1
225/255
.733/.693

348-334/266
78%
85.8/95.8
254/284
.661/.617

373-359/281
76.8%
92.1/101
273/300
.591/.543

380-375/290
76.8%
94.9/104
281/310
.523/.48

384-387/302
78.3%
97/109
287/322
.467/.438

386-394/312
80%
98.1/112
291/333
.42/.402

322/255
78.9%
-
.456/.381

AFR 315 CNC SF600 Alum

315/-

2.25/1.88
4.60
2 1/8" Pipe

121

169/146
86.4%

249/184
73.9%
62.6/66.3
186/196
.804/.711

312/238
76.3%
78.5/85.7
233/254
.756/.69

353/271
76.8%
88.8/97.6
263/289
.684/.629

380/296
77.9%
95.6/107
283/316
.614/.572

386/310
80.3%
97.1/112
288/331
.534/.514

387/315
81.4%
97.3/113
288/336
.469/.457

319/251
78.7%
1.23
.456/.381

AFR 315 Alum CHP

315/-

2.25/1.88
4.25
Pipe

N/A

76/62
81.6%

162/133
82.1%

232/199
85.8%
58.3/71.7
173/212
.749/.769

282/256
90.8%
70.9/92.2
210/273
.683/.742

321/284
88.5%
80.7/102
239/303
.622/.659

348/290
83.3%
87.5/104
259/310
.562/.561

368/293
79.6%
92.6/106
274/313
.509/.485

370/300
81.1%
93.1/108
276/320
.448/.435

298/251
84.3%
1.17
.456/.381

AFR 315 CNC Wolfplace FlowData Alum

315/-

2.25/1.88
4.31
No Pipe

N/A

78/69
88.5%

162/142
87.7%

239/198
82.8%
60.1/71.3
178/211
.772/.765

290/240
82.8%
72.9/86.5
216/256
.703/.696

334/267
79.9%
84/96.2
249/285
.647/.619

358/280
78.2%
90/101
267/299
.578/.541

374/283
75.7%
94.1/102
279/302
.518/.469

377/286
75.9%
94.8/103
281/305
.457/.415

305/242
79.5%
1.20
.456/.381

AFR 315 CNC Wolfplace FlowData Alum

315/-

2.25/1.88
4.53
No Pipe

N/A

78/69
88.5%

164/142
86.6%

247/198
80.2%
62.1/71.3
184/211
.798/.765

309/240
77.7%
77.7/86.5
230/256
.749/.696

350/267
76.3%
88/96.2
261/285
.678/.619

375/280
74.7%
94.3/101
279/299
.606/.541

383/283
73.9%
96.3/102
285/302
.53/.469

381/286
75.1%
95.8/103
284/305
.461/.415

316/242
76.8%
1.22
.456/.381

AFR 325 SF600 Alum

325/-

2.30/1.88
4.60
2 1/8" Pipe

119

142/131
92.3%

213/176
82.6%
51.3/63.4
152/188
.673/.68

280/219
78.2%
67.4/78.9
200/234
.664/.635

331/251
75.8%
79.7/90.4
236/268
.628/.582

370/276
74.6%
89.1/99.4
264/295
.585/.533

384/285
74.2%
92.4/103
274/304
.52/.472

287/223
77.8%
1.18
.466/.381

AFR 325 Weingartner Racing Brez

N/A

2.30/1.88
4.31
No Pipe

N/A

81/63
77.8%

166/137
82.5%

236/182
77.1%
56.8/65.6
168/194
.746/.704

293/226
77.1%
70.5/81.4
209/241
.694/.655

340/258
75.9%
81.8/92.9
242/275
.645/.598

358/274
76.5%
86.2/98.7
255/292
.566/.53

377/280
74.3%
90.7/101
269/299
.511/.464

383/282
73.6%
92.2/102
273/301
.454/.409

386/282
73.1%
92.9/102
275/301
.407/.363

317/240
75.7%
-
.466/.381

AFR 335 CNC SF600 Alum

335/-

2.30/1.88
4.60
2 1/8" Pipe

121

164/144
87.8%

240/197
82.1%
57.8/71
171/210
.758/.762

304/257
84.5%
73.2/92.6
217/274
.72/.745

352/285
81%
84.7/103
251/304
.667/.661

385/311
80.8%
92.7/112
275/332
.608/.601

404/319
79%
97.2/115
288/340
.547/.528

410/325
79.3%
98.7/117
292/347
.486/.471

323/263
81.4%
1.22
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

AFR 335 CNC SF600 Out of Box Alum

335/-

2.30/1.88
4.60
No Pipe

N/A

170/133
78.2%

249/178
71.5%
59.9/64.1
178/190
.787/.688

313/230
73.5%
75.3/82.9
223/245
.742/.667

362/259
71.5%
87.1/93.3
258/276
.686/.601

396/268
67.7%
95.3/96.5
282/286
.626/.518

405/273
67.4%
97.5/98.3
289/291
.548/.452

316/224
70.8%
1.21
.466/.381

AFR 335 CNC SF600 Alum

335/-

2.30/1.88
-
2 1/8" Pipe

121

164/142
86.6%

240/193
80.4%
57.8/69.5
171/206
.758/.746

304/244
80.3%
73.2/87.9
217/260
.72/.707

352/278
79%
84.7/100
251/297
.667/.645

385/310
80.5%
92.7/112
275/331
.608/.599

404/321
79.5%
97.2/116
288/343
.547/.532

410/327
79.8%
98.7/118
292/349
.486/.474

323/259
80.3%
1.22
.466/.381

AFR 345 SF600 Alum

345/-

2.30/1.88
4.60
2 1/8" Pipe

119

141/135
95.7%

212/169
79.7%
51/60.9
151/180
.67/.653

279/219
78.5%
67.2/78.9
199/234
.661/.635

333/249
74.8%
80.1/89.7
237/266
.631/.578

372/272
73.1%
89.5/98
265/290
.588/.526

401/285
71.1%
96.5/103
286/304
.543/.472

405/290
71.6%
97.5/104
289/310
.48/.42

306/231
75.5%
1.17
.466/.381

AFR 345 NPS Alum

N/A

2.30/1.88
4.25
No Pipe

N/A

75/57
76%

137/116
84.7%

209-208/176
84.4%
50.2/63.4
149/188
.659/.68

271-277/221
80.7%
65.9/79.6
195/236
.649/.641

319-327/243
75.2%
77.7/87.5
230/259
.612/.564

345-364/253
71.4%
85.3/91.1
253/270
.56/.489

357-388/261
70.1%
89.7/94
266/279
.504/.432

368-398/264
68.9%
92.2/95.1
273/282
.454/.383

293/219
74.7%
-
.466/.381

AFR 357 CNC SF600 Alum

357/-

2.30/1.88
4.60
2 1/8" Pipe

121

167/144
86.2%

242/197
81.4%
58.2/71
173/210
.765/.762

307/257
83.7%
73.9/92.6
219/274
.728/.745

354/285
80.5%
85.2/103
252/304
.671/.661

393/311
79.1%
94.6/112
280/332
.621/.601

415/319
76.9%
99.9/115
296/340
.562/.528

425/325
76.5%
102/117
303/347
.504/.471

329/263
79.8%
1.19
.466/.381

AFR 377 CNC SF600 Alum

357/-

2.30/1.88
4.60
2 1/8" Pipe

121

176/148
84.1%

260/205
78.8%
62.6/73.8
185/219
.822/.792

328/263
80.2%
78.9/94.7
234/281
.777/.762

382/302
79.1%
91.9/109
272/322
.724/.70

415/316
76.1%
99.9/114
296/337
.656/.611

427/330
77.3%
103/119
305/352
.578/.547

434/340
78.3%
104/122
310/363
.514/.493

437/345
78.9%
105/124
312/368
.46/.445

357/281
78.7%
1.22
.466/.381

AFR 385 CNC Alum

385/-

2.35/1.88
4.60
2.125" Pipe

121

176/149
84.7%

256/205
80.1%
59/73.8
175/219
.792/.792

327/267
81.7%
75.4/96.2
223/285
.758/.774

386/302
78.2%
89/109
264/322
.716/.70

421/322
76.5%
97.1/116
288/344
.651/.622

444/334
75.2%
102/120
303/357
.588/.553

452/344
76.1%
104/124
309/367
.524/.499

456/350
76.8%
105/126
312/374
.47/.451

365/284
77.9%
1.18
.476/.381

AFR 385 Out of Box Alum

N/A

2.35/1.88
4.625
2.25" Pipe

N/A

161/139
86.3%

230/210
91.3%
53/75.7
157/224
.711/.812

299/273
91.3%
68.9/98.3
204/291
.693/.791

357/299
83.8%
82.3/108
244/319
.662/.693

400/309
77.3%
92.2/111
273/330
.618/.597

427/315
73.8%
98.4/113
292/336
.566/.522

438/319
72.8%
101/115
299/340
.508/.462

330/266
80.6%
-
.476/.381

AFR 385 3v Performance Bad Port Out of Box Alum

385/-

2.35/-

N/A

78/-

167/-

242/-
55.8
165
.748

303/-
69.9
207
.703

349/-
80.5
238
.648

381/-
87.8
260
.589

409/-
94.3
279
.542

423/-
97.5
289
.491

433/-
99.8
296
.446

440/-
101
301
.408

350
-
1.14
.476

AJPE 316 Billet Alum

316/119

2.19/1.85
4.25
2.375" Pipe

118

151/122
80.8%

233/174
74.7%
61.9/64.7
183/192
.773/.684

290/244
84.1%
77/90.8
228/269
.722/.719

325/283
87.1%
86.3/105
256/312
.647/.667

348/302
86.8%
92.4/112
274/333
.577/.593

360/310
86.1%
95.6/115
283/342
.512/.522

367/315
85.8%
97.4/117
289/347
.457/.464

375/-
99.6
295
.415

306/250
-
1.19/2.65
.443/.375

AJPE 368 02 Billet Alum

368/130

2.35/1.88
4.50
2.375" Pipe

118

159/118
74.2%

242/175
72.3%
55.8/63
165/187
.748/.676

303/249
82.2%
69.9/89.7
207/266
.703/.722

337/291
86.4%
77.7/105
230/311
.625/.675

387/305
78.8%
89.2/110
264/326
.598/.59

390/315
80.8%
89.9/113
266/336
.517/.522

407/322
79.1%
93.8/116
278/344
.472/.467

422/329
78%
97.3/119
288/351
.435/.424

331/263
79.5%
1.15/2.53
.476/.381

AJPE 368 03 Billet Alum

368/130

2.35/1.88
4.50
2.375" Pipe

111

147/131
89.1%

222/181
81.5%
51.2/65.2
152/193
.687/.70

287/252
87.8%
66.2/90.8
196/269
.666/.731

328/295
89.9%
75.6/106
224/315
.609/.684

364/313
86%
83.9/113
249/334
.563/.605

392/322
82.1%
90.4/116
268/344
.52/.533

406/327
80.5%
93.6/118
277/349
.471/.474

421/333
79.1%
97.1/120
288/355
.434/.429

321/269
83.9%
1.14/2.56
.476/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

AJPE 5.3 Inch BS Alum

591/240

2.70/2.05
-
2.4" Pipe

102

170/131
77.1%

255/183
71.8%
44.5/55.4
132/164
.686/.649

363/232
63.9%
63.4/70.3
188/208
.733/.617

449/289
64.4%
78.4/87.6
232/259
.725/.615

525/336
64%
91.7/102
272/302
.707/.596

598/375
62.7%
104/114
309/337
.69/.57

650/404
62.2%
114/122
336/363
.656/.537

661/426
64.4%
115/129
342/382
.593/.503

665/437
65.7%
116/132
344/392
.537/.465

670/448
66.9%
117/136
347/402
.492/.433

501/326
65.1%
1.13/1.87
.547/.415

Avenger 345 CNC 24 Deg Alum

345/110

2.30/1.90

110/119

80/75
93.8%

151/133
88.1%

245/170
69.4%
59/60
175/178
.774/.65

304/201
66.1%
73.2/70.9
217/210
.72/.577

342/228
66.7%
82.3/80.4
244/238
.648/.523

364/258
70.9%
87.6/91
260/270
.575/.493

378/277
73.3%
91/97.7
270/289
.512/.454

384/288
75%
92.4/102
274/301
.455/.413

310/222
71.7%
1.11/2.62
.466/.385

Avenger 360 CNC 24 Deg Alum

360/110

2.30/1.90

110/119

79/75
94.9%

149/138
92.6%

218/178
81.7%
52.5/62.8
155/186
.689/.681

278/200
71.9%
66.9/70.5
198/209
.659/.574

337/226
67.1%
81.1/79.7
240/236
.639/.519

367/262
71.4%
88.3/92.4
262/274
.58/.501

381/282
74%
91.7/99.5
272/295
.516/.462

392/293
74.7%
94.3/103
280/306
.464/.42

303/226
74.4%
1.09/2.66
.466/.385

BMF 310 CNC Port Alum

310/150

2.30/1.88

119

259/174
67.2%
62.3/62.7
185/186
.818/.673

325/212
65.2%
78.2/76.4
232/226
.77/.615

374/250
66.8%
90/90.1
267/267
.709/.58

386/277
71.8%
92.9/99.8
275/296
.61/.535

393/292
74.3%
94.6/105
280/312
.532/.484

394/304
77.2%
94.8/110
281/324
.467/.441

400/315
78.8%
96.3/113
285/336
.421/.406

362/261
72.1%
1.29/2.10
.466/.381

BMF 310 Out of Box Weingartner Racing Alum

310/-

2.30/1.88
4.50
No Pipe

N/A

77/68
88.3%

153/130
85%

235/176
74.9%
56.6/63.4
168/188
.743/.68

281/214
76.2%
67.6/77.1
200/228
.666/.62

323/248
76.8%
77.7/89.3
230/265
.612/.575

358/268
74.9%
86.2/96.5
255/286
.566/.518

357/283
79.3%
85.9/102
255/302
.483/.469

357/299
83.8%
85.9/108
255/319
.423/.433

295/231
78.4%
1.15
.466/.381

BMF 310 Out of Box Weingartner Racing Brez Alum

310/-

2.30/1.88
4.31
No Pipe

N/A

78/63
80.8%

151/133
88.1%

219/171
78.1%
52.7/61.6
156/183
.692/.661

273/216
79.1%
65.7/77.8
195/231
.647/.626

317/258
81.4%
76.3/92.9
226/275
.601/.598

352/274
77.8%
84.7/98.7
251/292
.556/.53

372/289
77.7%
89.5/104
265/308
.504/.479

377/300
79.6%
90.7/108
269/320
.447/.435

294/234
79.6%
1.22
.466/.381

BMF/CFE 10sec CNC Alum

310/-

2.25/1.88
4.31
No Pipe

N/A

67/61
91%

130/125
96.2%

204/160
78.4%
51.3/57.6
152/171
.659/.618

282/208
73.8%
70.9/74.9
210/222
.683/.603

324/243
75%
81.5/87.5
241/259
.628/.564

356/265
74.4%
89.5/95.5
265/283
.575/.512

378/277
73.3%
95.1/99.8
282/296
.523/.459

381/288
75.6%
95.8/104
284/307
.461/.417

294/224
76.2%
1.23
.456/.381

BMF/CFE 10sec CNC Alum

310/-

2.25/1.88
4.31
2" Pipe

N/A

67/61
91%

130/131
100%

204/179
87.7%
51.3/64.5
152/191
.659/.692

282/220
78%
70.9/79.3
210/235
.683/.638

324/256
79%
81.5/92.2
241/273
.628/.594

356/280
78.7%
89.5/101
265/299
.575/.541

378/285
75.4%
95.1/103
282/304
.523/.472

381/307
80.6%
95.8/111
284/328
.461/.445

294/237
80.7%
1.23
.456/.381

BMF 330 CNC Port Alum

330/150

2.30/1.88

119

264/174
65.9%
63.5/62.7
188/186
.834/.673

331/212
64%
79.7/76.4
236/226
.784/.615

397/250
63%
95.6/90.1
283/267
.753/.58

398/277
69.6%
95.8/99.8
284/296
.629/.535

398/292
73.4%
95.8/105
284/312
.539/.484

400/304
76%
96.3/110
285/324
.474/.441

400/315
78.8%
96.3/113
285/336
.421/.406

370/261
70.5%
1.21/2.10
.466/.381

BMF 350 CNC Port Alum

350/150

2.30/1.88

119

259/174
67.2%
62.3/62.7
185/186
.818/.673

326/212
65%
78.5/76.4
232/226
.773/.615

372/250
67.2%
89.5/90.1
265/267
.705/.58

407/277
68.1%
98/99.8
290/296
.643/.535

414/292
70.5%
99.6/105
295/312
.561/.484

416/304
73.1%
100/110
297/324
.493/.441

418/315
75.4%
101/113
298/336
.44/.406

373/261
69.8%
1.19/2.10
.466/.381

BMF 385 CNC Port Alum

385/150

2.30/1.88

119

267/174
65.2%
64.3/62.7
190/186
.844/.673

336/212
63.1%
80.9/76.4
240/226
.796/.615

381/250
65.6%
91.7/90.1
272/267
.722/.58

405/277
68.4%
97.5/99.8
289/296
.64/.535

420/292
69.5%
101/105
300/312
.569/.484

432/304
70.4%
104/110
308/324
.512/.441

442/315
71.3%
106/113
315/336
.466/.406

383/261
68%
1.15/2.10
.466/.381

BMF2 405 CNC Port Alum

405/150

2.35/1.88

119

258/174
67.4%
59.5/62.7
176/186
.798/.673

325/212
65.2%
74.9/76.4
222/226
.754/.615

375/250
66.7%
86.5/90.1
256/267
.696/.58

411/277
67.4%
94.8/99.8
281/296
.636/.535

429/292
68.1%
98.9/105
293/312
.569/.484

443/304
68.6%
102/110
303/324
.514/.441

456/315
69.1%
105/113
312/336
.47/.406

385/261
67.6%
1.13/2.10
.476/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

BMF - Texas Pro Stock Ported Slick Rick Racing Heads Alum

N/A

2.35/-

N/A

230/-
53
157
.711

312/-
71.9
213
.724

376/-
86.7
257
.698

418/-
96.4
286
.646

451/-
104
308
.598

466/-
107
318
.54

475/-
110
324
.49

480/-
111
328
.445

484/-
112
331
.408

410
-
-
.476

BMF - Texas Pro Stock Ported Slick Rick Racing Heads Alum

N/A

2.375/-

N/A

232/-
52.4
155
.71

314/-
70.9
210
.721

383/-
86.5
256
.703

437/-
98.6
292
.669

459/-
104
307
.602

480/-
108
321
.551

492/-
111
329
.502

495/-
112
331
.454

496/-
112
332
.414

421
-
-
.481

BMF - Texas Pro Stock Ported Slick Rick Racing Heads Alum

N/A

2.40/-

N/A

250/-
55.3
164
.757

320/-
70.7
210
.727

390/-
86.2
255
.709

446/-
98.6
292
.675

473/-
105
310
.614

484/-
107
317
.55

494/-
109
324
.499

504/-
111
330
.458

511/-
113
335
.422

430
-
-
.486

Brodix JJ 270 Alum

270/-

2.25/1.88

119

159/116
73%

223/145
65%
56.1/52.2
166/155
.72/.561

270/172
63.7%
67.9/62
201/184
.654/.499

314/196
62.4%
79/70.6
234/209
.609/.455

334/217
65%
84/78.2
249/232
.539/.419

340/236
69.4%
85.5/85
253/252
.471/.391

273/180
66%
1.26
.456/.381

Brodix JJ 294 Alum

294/-

2.25/1.88

119

160/116
72.5%

226/145
64.2%
56.8/52.2
168/155
.73/.561

276/172
62.3%
69.4/62
206/184
.669/.499

314/196
62.4%
79/70.6
234/209
.609/.455

337/217
64.4%
84.8/78.2
251/232
.544/.419

342/236
69%
86/85
255/252
.473/.391

276/180
65.4%
1.16
.456/.381

Brodix-HVH Oval Alum

N/A

2.25/1.88

N/A

170/126
74.1%

250/177
70.8%
62.9/63.8
186/189
.807/.684

307/212
69.1%
77.2/76.4
229/226
.744/.615

347/246
70.9%
87.3/88.6
259/263
.672/.571

373/267
71.6%
93.8/96.2
278/285
.602/.516

384/279
72.7%
96.6/101
286/298
.532/.462

388/288
74.2%
97.6/104
289/307
.47/.417

317/228
71.9%
-
.456/.381

Brodix BB-1 OEFI Alum

258/-

2.25/1.88

119

162/106
65.4%

219/137
62.6%
55.1/49.4
163/146
.707/.53

252/166
65.9%
63.4/59.8
188/177
.61/.481

265/190
71.7%
66.6/68.4
197/203
.514/.441

272/211
77.6%
68.4/76
203/225
.439/.408

273/225
82.4%
68.7/81.1
203/240
.378/.373

241/173
71.7%
1.06
.456/.381

Brodix RR BB-O CCM Alum

270/-

2.25/1.88
-
Pipe

119

74/64
86.5%

163/113
69.3%

218/145
66.5%
54.8/52.2
162/155
.704/.561

267/171
64%
67.2/61.6
199/183
.647/.496

306/194
63.4%
77/69.9
228/207
.593/.45

328/216
65.9%
82.5/77.8
244/231
.53/.417

341/234
68.6%
85.8/84.3
254/250
.472/.388

348/244
70.1%
87.5/87.9
259/260
.422/.354

282/188
66.8%
1.29
.456/.381

Brodix RR BB-O 26 Deg Alum

270/-

2.25/1.88

119

154/106
68.8%

221/137
62%
55.6/49.4
165/146
.714/.53

274/164
59.9%
68.9/59.1
204/175
.664/.475

316/188
59.5%
79.5/67.7
235/201
.612/.436

335/211
63%
84.3/76
250/225
.541/.408

342/229
67%
86/82.5
255/244
.473/.379

274/173
63%
1.27
.456/.381

Brodix RR BB-O CNC Chamber Wolfplace FlowData Alum

270/-

2.25/1.88
4.53
No Pipe

N/A

77/65
84.4%

152/118
77.6%

224/147
65.6%
56.3/53
167/157
.724/.568

283/178
62.9%
71.2/64.1
211/190
.686/.516

318/205
64.5%
80/73.8
237/219
.616/.475

344/230
66.9%
86.5/82.9
256/245
.556/.445

347/248
71.5%
87.3/89.3
259/265
.48/.411

278/188
67.5%
1.29
.456/.381

Brodix RR BB-R 26 Deg Alum

294/-

2.25/1.88

119

160/106
66.3%

227/137
60.4%
57.1/49.4
169/146
.733/.53

279/164
58.8%
70.2/59.1
208/175
.676/.475

317/188
59.3%
79.7/67.7
236/201
.614/.436

328/211
64.3%
82.5/76
244/225
.53/.408

340/229
67.4%
85.5/82.5
253/244
.471/.379

275/173
62.7%
1.16
.456/.381

Brodix RR BB-R CNC Chamber Hekimian Racing Alum

N/A

2.25/1.88

119

161/112
69.6%

228/146
64%
57.3/52.6
170/156
.736/.564

281/178
63.3%
70.7/64.1
209/190
.681/.516

321/203
63.2%
80.7/73.1
239/217
.622/.471

339/222
65.5%
85.3/80
253/237
.547/.429

346/235
67.9%
87/84.7
258/251
.479/.389

279/183
65.4%
-
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Brodix RR BB-R Ported Mike Stark I-45 E-45 Saenz 680 Alum

310/-

2.25/1.88
4.31
No Pipe

N/A

75/66
88%

156/123
78.8%

230/154
67%
57.8/55.5
171/164
.743/.595

297/184
62%
74.7/66.3
221/196
.719/.533

341/209
61.3%
85.8/75.3
254/223
.661/.485

370/232
62.7%
93.1/83.6
276/248
.598/.448

384/250
65.1%
96.6/90.1
286/267
.532/.414

385/265
68.8%
96.8/95.5
287/283
.466/.384

387/275
71.1%
97.3/99.1
288/294
.417/.354

319/212
66.4%
1.25
.456/.381

Brodix RR BB-2 Plus Alum

312/-

2.25/1.88

119

150/116
77.3%

215/145
67.4%
54.1/52.2
160/155
.694/.561

265/172
64.9%
66.6/62
197/184
.642/.499

311/196
63%
78.2/70.6
232/209
.603/.455

334/217
65%
84/78.2
249/232
.539/.419

344/236
68.6%
86.5/85
256/252
.476/.391

270/180
66.8%
1.10
.456/.381

Brodix RR BB-2 Plus STS Alum

320/-

2.25/1.88

119

162/126
77.8%

244/164
67.2%
61.4/59.1
182/175
.788/.634

285/201
70.5%
71.7/72.4
212/215
.69/.583

328/228
69.5%
82.5/82.1
244/243
.636/.529

359/251
69.9%
90.3/90.4
268/268
.58/.485

369/267
72.4%
92.8/96.2
275/285
.511/.442

373/284
76.1%
93.8/102
278/303
.452/.412

303/217
71.7%
1.17
.456/.381

Brodix BB-1 26 Deg Alum

280/-

2.25/1.88

119

150/106
70.7%

209/137
65.6%
52.6/49.4
156/146
.675/.53

259/166
64.1%
65.1/59.8
193/177
.627/.481

290/190
65.5%
72.9/68.4
216/203
.562/.441

300/211
70.3%
75.5/76
224/225
.484/.408

303/225
74.3%
76.2/81.1
226/240
.419/.373

252/173
68.5%
1.08
.456/.381

Brodix BB-1 26 Deg 305 CNC M2 Race Systems Alum

305/-

2.25/1.88

119

154/135
87.7%

236/176
74.6%
59.4/63.4
176/188
.762/.68

293/211
72%
73.7/76
218/225
.71/.612

339/242
71.4%
85.3/87.2
253/258
.657/.561

362/265
73.2%
91/95.5
270/283
.585/.512

371/281
75.7%
93.3/101
276/300
.514/.466

293/218
74.6%
1.22
.456/.381

Brodix BB-1 26 Deg 308 CNC M2 Race Systems Alum

308/-

2.30/1.88
4.50

118

253/188
74.3%
60.9/67.7
180/201
.799/.727

311/215
69.1%
74.9/77.5
222/229
.737/.623

349/250
71.6%
84/90.1
249/267
.662/.58

367/282
76.8%
88.3/102
262/301
.58/.545

376/301
80.1%
90.5/108
268/321
.509/.499

380/307
80.8%
91.5/111
271/328
.45/.445

339/257
75.8%
1.23
.466/.381

Brodix BB-2 26 Deg Alum

305/-

2.25/1.88

119

157/107
68.2%

212/137
64.6%
53.3/49.4
158/146
.685/.53

263/166
63.1%
66.1/59.8
196/177
.637/.481

294/190
64.6%
73.9/68.4
219/203
.57/.441

312/214
68.6%
78.5/77.1
233/228
.504/.414

320/226
70.6%
80.5/81.4
238/241
.443/.374

260/173
66.8%
1.05
.456/.381

Brodix BB-2 Plus 26 Deg Alum

312/-

2.25/1.88

119

150/122
81.3%

215/148
68.8%
54.1/53.3
160/158
.694/.572

265/187
70.6%
66.6/67.4
197/200
.642/.542

311/216
69.5%
78.2/77.8
232/231
.603/.501

334/229
68.6%
84/82.5
249/244
.539/.443

344/238
69.2%
86.5/85.7
256/254
.476/.394

270/190
70.4%
1.10
.456/.381

Brodix BB-2 Plus STS 26 Deg Alum

320/-

2.25/1.88

119

162/132
81.5%

244/169
69.3%
61.4/60.9
182/180
.788/.653

285/204
71.6%
71.7/73.5
212/218
.69/.591

328/234
71.3%
82.5/84.3
244/250
.636/.543

359/261
72.7%
90.3/94
268/279
.58/.504

369/274
74.3%
92.8/98.7
275/292
.511/.454

373/284
76.1%
93.8/102
278/303
.452/.412

303/223
73.5%
1.17
.456/.381

Brodix BB-2X 26 Deg Alum

340/-

2.30/1.88

119

154/106
68.8%

211/137
64.9%
50.8/49.4
150/146
.667/.53

260/166
63.8%
62.6/59.8
185/177
.616/.481

292/190
65.1%
70.3/68.4
208/203
.554/.441

312/211
67.6%
75.1/76
223/225
.493/.408

323/225
69.7%
77.7/81.1
230/240
.437/.373

259/173
66.7%
0.95
.466/.381

Brodix BB-2X 26 Deg Alum

340/-

2.30/1.88

119

153/122
79.7%

221/138
62.4%
53.2/49.7
158/147
.698/.533

276/171
62%
66.4/61.6
197/183
.654/.496

322/198
61.5%
77.5/71.3
230/211
.61/.459

357/216
60.5%
85.9/77.8
255/231
.564/.417

363/229
63.1%
87.4/82.5
259/244
.492/.379

282/179
63.5%
1.07
.466/.381

Brodix BB-2X 26 Deg 3V Performance Ported Alum

N/A

2.30/1.88
4.50
No Pipe

N/A

148-146/126
85.7%

213-209/161
76.3%
50.8/58
150/172
.667/.622

265-258/204
78%
62.9/73.5
186/218
.62/.591

310-301/244
79.9%
73.5/87.9
218/260
.579/.566

345-319/275
82.8%
79.9/99.1
237/294
.525/.532

368-337/291
82.6%
84.8/105
251/311
.477/.482

376-353/301
82.6%
87.7/108
260/321
.432/.436

282/229
81.2%
-
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Brodix BB-2X 26 Deg CNC CC Alum

341/-

2.30/1.88

N/A

153/132
86.3%

225/176
78.2%
54.2/63.4
160/188
.711/.68

285/211
74%
68.6/76
203/225
.675/.612

333/235
70.6%
80.1/84.7
237/251
.631/.545

368/254
69%
88.6/91.5
262/271
.581/.491

365/264
72.3%
87.9/95.1
260/282
.494/.437

365/270
74%
87.9/97.3
260/288
.432/.391

299/220
73.6%
1.08
.466/.381

Brodix BB-2X 26 Deg Sonny's Alum

341/124

2.30/1.90

119

367/265
72.2%
88.3/93.5
262/277
.435/.38

-
-
1.08/2.14
.466/.385

Brodix BB-2Xtra 26 Deg Alum

340/-

2.30/1.88

119

160/132
82.5%

220/159
72.3%
53/57.3
157/170
.695/.615

277/193
69.7%
66.7/69.5
198/206
.656/.56

325/219
67.4%
78.2/78.9
232/234
.616/.508

360/234
65%
86.6/84.3
257/250
.569/.452

379/250
66%
91.2/90.1
270/267
.513/.414

287/198
69%
1.11
.466/.381

Brodix BB-2Xtra 26 Deg CNC M2 Race Systems Alum

355/-

2.30/1.88
4.50

119

183/134
73.2%

235/177
75.3%
56.6/63.8
168/189
.743/.684

294/216
73.5%
70.8/77.8
210/231
.697/.626

340/247
72.6%
81.8/89
242/264
.645/.573

376/268
71.3%
90.5/96.5
268/286
.594/.518

395/280
70.9%
95.1/101
282/299
.535/.464

408/288
70.6%
98.2/104
291/307
.483/.417

319/230
72.2%
1.15
.466/.381

Brodix BB-3 26 Deg EVM 30 Alum

370/-

2.35/1.88

119

145/93
64.1%

206/129
62.6%
47.5/46.5
141/138
.637/.499

265/161
60.8%
61.1/58
181/172
.615/.467

316/187
59.2%
72.9/67.4
216/200
.586/.434

351/213
60.7%
80.9/76.7
240/227
.543/.412

371/229
61.7%
85.5/82.5
253/244
.492/.379

276/169
61.2%
1.00
.476/.381

Brodix BB-3Xtra 24 Deg Alum

363/-

2.30/1.88

119

154/142
92.2%

230/187
81.3%
55.4/67.4
164/200
.727/.723

300/217
72.3%
72.2/78.2
214/232
.711/.629

356/243
68.3%
85.7/87.5
254/259
.675/.564

387/265
68.5%
93.1/95.5
276/283
.611/.512

389/275
70.7%
93.6/99.1
277/294
.527/.456

389/280
72%
93.6/101
277/299
.461/.406

391/281
71.9%
94.1/101
279/300
.412/.362

325/236
72.8%
1.08
.466/.381

Brodix BB-3Xtra BP 24 Deg CNC Alum

366/-

2.30/1.88

119

154/130
84.4%

237/177
74.7%
57/63.8
169/189
.749/.684

307/239
77.9%
73.9/86.1
219/255
.728/.693

362/278
76.8%
87.1/100
258/297
.686/.645

394/284
72.1%
94.8/102
281/303
.622/.549

416/290
69.7%
100/104
297/310
.563/.48

423/295
69.7%
102/106
302/315
.501/.428

423/297
70.2%
102/107
302/317
.446/.383

340/249
73.3%
1.16
.466/.381

Brodix BB-3Xtra O 24 Deg 335 CNC I-45 E-45 Alum

335/-

2.35/1.88

119

162/142
87.7%

233/187
80.3%
53.7/67.4
159/200
.721/.723

298/217
72.8%
68.7/78.2
204/232
.691/.629

355/243
68.5%
81.8/87.5
243/259
.659/.564

397/265
66.8%
91.5/95.5
271/283
.614/.512

417/275
65.9%
96.1/99.1
285/294
.553/.456

420/280
66.7%
96.8/101
287/299
.487/.406

411/281
68.4%
94.8/101
281/300
.424/.362

337/236
70.2%
1.25
.476/.381

Brodix BB-3Xtra O 24 Deg 380 CNC I-45 E-45 Alum

380/-

2.35/1.88

119

159/134
84.3%

237/182
76.8%
54.6/65.6
162/194
.733/.704

309/219
70.9%
71.2/78.9
211/234
.717/.635

360/254
70.6%
83/91.5
246/271
.668/.589

401/254
63.3%
92.5/91.5
274/271
.62/.491

430/301
70%
99.1/108
294/321
.57/.499

443/306
69.1%
102/110
303/327
.514/.444

442/311
70.4%
102/112
302/332
.456/.401

348/245
70.5%
1.17
.476/.381

Brodix BB-3Xtra O 24 Deg 332 CNC I-50 E-50 Alum

332/-

2.30/1.88

119

153/130
85%

231/177
76.6%
55.6/63.8
165/189
.73/.684

300/239
79.7%
72.2/86.1
214/255
.711/.693

354/278
78.5%
85.2/100
252/297
.671/.645

396/284
71.7%
95.3/102
282/303
.626/.549

424/290
68.4%
102/104
302/310
.574/.48

425/295
69.4%
102/106
303/315
.504/.428

428/297
69.4%
103/107
305/317
.451/.383

339/249
73.4%
1.29
.466/.381

Brodix BB-3Xtra O 24 Deg 351 CNC D & F Alum

351/-

2.30/1.88

119

163/130
79.8%

240/177
73.8%
57.8/63.8
171/189
.758/.684

312/239
76.6%
75.1/86.1
223/255
.739/.693

360/278
77.2%
86.6/100
257/297
.682/.645

393/284
72.3%
94.6/102
280/303
.621/.549

412/290
70.4%
99.2/104
294/310
.558/.48

418/295
70.6%
101/106
298/315
.495/.428

425/297
69.9%
102/107
303/317
.448/.383

340/249
73.1%
1.21
.466/.381

Brodix BB-3Xtra O 24 Deg 351 CNC I-50 E-50 Alum

351/-

2.35/1.88

119

154/130
84.4%

229/177
77.3%
52.8/63.8
156/189
.708/.684

298/239
80.2%
68.7/86.1
204/255
.691/.693

353/278
78.8%
81.4/100
241/297
.655/.645

400/284
71%
92.2/102
273/303
.618/.549

433/290
67%
99.8/104
296/310
.574/.48

441/295
66.9%
102/106
301/315
.511/.428

443/297
67%
102/107
303/317
.457/.383

344/249
72.3%
1.26
.476/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Brodix BB-3Xtra O 24 Deg 365 CNC I-50 E-50 Alum

365/-

2.35/1.88

119

151/130
86.1%

224/177
79%
51.6/63.8
153/189
.693/.684

294/239
81.3%
67.8/86.1
201/255
.682/.693

351/278
79.2%
80.9/100
240/297
.651/.645

400/284
71%
92.2/102
273/303
.618/.549

433/290
67%
99.8/104
296/310
.574/.48

451/295
65.4%
104/106
308/315
.523/.428

460/297
64.6%
106/107
314/317
.474/.383

346/249
72%
1.26
.476/.381

Brodix BB-3Xtra O 24 Deg 3v Performance Bad Port Alum

355/-

2.35/-

N/A

87/-

168/-

242/-
55.8
165
.748

304/-
70.1
208
.705

348/-
80.2
238
.646

375/-
86.5
256
.58

397/-
91.5
271
.526

418/-
96.4
286
.485

428/-
98.7
292
.441

433/-
99.8
296
.402

346
-
1.22
.476

Brodix BB-377 HH 24 Deg Oval CNC I-52 E-55 Alum

377/-

2.375/1.85

N/A

145/122
84.1%

221/190
86%
49.9/70.7
148/209
.676/.746

296/231
78%
66.8/85.9
198/255
.679/.681

353/266
75.4%
79.7/99
236/293
.648/.627

397/287
72.3%
89.6/107
266/316
.607/.564

434/304
70%
98/113
290/335
.569/.512

457/306
67%
103/114
306/337
.524/.451

469/308
65.7%
106/115
314/340
.478/.403

347/252
72.7%
1.24
.481/.375

Brodix BP HH BB 383 24 Deg Oval CNC I-52 E-55 Alum

383/-

2.375/1.85

119

145/122
84.1%

221/190
86%
49.9/70.7
148/209
.676/.746

296/231
78%
66.8/85.9
198/255
.679/.681

353/266
75.4%
79.7/99
236/293
.648/.627

397/287
72.3%
89.6/107
266/316
.607/.564

434/304
70%
98/113
290/335
.569/.512

457/306
67%
103/114
306/337
.524/.451

469/308
65.7%
106/115
314/340
.478/.403

347/252
72.7%
1.22
.481/.375

Brodix BP HH BB 383 MC 24 Deg Oval CNC I-55 E-55 25/50 Alum

383/-

2.40/1.85

119

143/122
85.3%

218/169
77.5%
48.2/62.9
143/186
.66/.664

291/211
72.5%
64.3/78.5
191/233
.661/.622

352/247
70.2%
77.8/91.9
231/272
.64/.582

402/270
67.2%
88.9/100
263/298
.609/.53

449/294
65.5%
99.3/109
294/324
.583/.495

470/304
64.7%
104/113
308/335
.534/.448

481/311
64.7%
106/116
315/343
.485/.407

351/241
68.7%
1.26
.486/.375

Brodix BP HH BB 395 MC 24 Deg Oval CNC I-55 E-55 25/50 Alum

395/-

2.40/1.85

119

141/126
89.4%

217/166
76.5%
48/61.8
142/183
.657/.652

291/208
71.5%
64.3/77.4
191/229
.661/.613

352/244
69.3%
77.8/90.8
231/269
.64/.575

405/266
65.7%
89.5/99
265/293
.613/.522

445/291
65.4%
98.4/108
291/321
.577/.49

469/301
64.2%
104/112
307/332
.533/.443

488/306
62.7%
108/114
320/337
.493/.401

351/239
67.9%
1.24
.486/.375

Brodix BB-4 24 Deg Alum

340/-

2.35/1.88

134

151/132
87.4%

211/161
76.3%
48.6/58
144/172
.653/.622

261/188
72%
60.2/67.7
178/201
.605/.545

303/216
71.3%
69.9/77.8
207/231
.562/.501

334/236
70.7%
77/85
228/252
.516/.456

361/252
69.8%
83.2/90.8
247/269
.478/.417

270/198
73.1%
1.06
.476/.381

Brodix BB-4 24 Deg Raised Port MBE SF600 Alum

385/-

2.375/1.80
4.52
No Pipe

134

148/117
79.1%

224-221/167
75.1%
50.2/65.6
149/194
.681/.674

290-289/211
72.9%
65.3/82.9
194/246
.664/.639

339-340/247
72.8%
76.6/97.1
227/288
.623/.598

394/270
68.5%
88.9/106
264/314
.603/.545

441-428/286
65.8%
98.1/112
291/333
.57/.495

469-449/295
64.3%
104/116
307/343
.527/.447

465-462/298
64.3%
105/117
310/347
.473/.401

464-470/300
64.2%
105/118
312/349
.429/.363

358/243
68.1%
1.21
.481/.365

Brodix BB-4Xtra 24 Deg M2 Race Systems CNC Alum

390/-

2.35/1.88
4.50

119

148/122
82.4%

214/161
75.2%
49.3/58
146/172
.662/.622

271/192
70.8%
62.5/69.2
185/205
.629/.557

332/221
66.6%
76.5/79.6
227/236
.616/.513

380/253
66.6%
87.6/91.1
260/270
.588/.489

414/269
65%
95.4/96.9
283/287
.549/.446

431/279
64.7%
99.4/101
294/298
.50/.404

313/214
68.4%
1.11
.476/.381

Brodix BB-4Xtra 24 Deg M2 Race Systems CNC Alum

390/-

2.35/1.90
4.60

119

141/122
86.5%

206/156
75.7%
47.5/55
141/163
.637/.597

275/190
69.1%
63.4/67
188/199
.638/.545

327/222
67.9%
75.4/78.3
223/232
.607/.509

382/245
64.1%
88.1/86.4
261/256
.591/.469

425/263
61.9%
98/92.8
290/275
.563/.431

447/276
61.7%
103/97.3
305/288
.518/.396

315/211
66.9%
1.15
.476/.385

Brodix BB-5 26 Deg Alum

387/-

2.35/1.90

108

108/77
71.3%

150/103
68.7%
34.6/36.3
102/108
.464/.394

203/134
66%
46.8/47.3
139/140
.471/.384

258/167
64.7%
59.5/58.9
176/175
.479/.383

309/200
64.7%
71.2/70.5
211/209
.478/.382

354/222
62.7%
81.6/78.3
242/232
.469/.364

384/238
62%
88.5/83.9
262/249
.445/.341

252/163
64.6%
0.99
.476/.385

Brodix BB-5 Sonny's Alum

390/-

2.35/1.90

108

111/74
66.7%

163/116
71.2%
37.6/40.9
111/121
.504/.444

219/153
69.9%
50.5/54
150/160
.508/.439

276/187
67.8%
63.6/66
189/195
.512/.429

321/213
66.4%
74/75.1
219/223
.496/.407

360/233
64.7%
83/82.2
246/243
.477/.382

242/163
67.3%
0.92
.476/.385

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Brodix BB-5 Sonny's Sportsman Alum

395/123

2.35/1.90

123

405/275
67.9%
93.4/97
277/287
.47/.394

-
-
1.03/2.24
.476/.385

Brodix BB-5 Sonny's Max Flow Alum

406/149

2.35/1.90

113.5

421/311
73.9%
97.1/110
288/325
.488/.446

439/-
101
300
.453

430
-
1.08/2.09
.476/.385

Brodix Big Duke Weingartner Racing

N/A

2.40/1.90
4.50
No Pipe

N/A

81/73
90.1%

178/137
77%

253/179
70.8%
55.9/63.1
166/187
.766/.685

296/210
70.9%
65.4/74.1
194/219
.672/.602

345/239
69.3%
76.3/84.3
226/250
.627/.548

380/272
71.6%
84/95.9
249/284
.575/.52

404/302
74.8%
89.3/107
265/316
.524/.495

424/314
74.1%
93.7/111
278/328
.481/.45

433/324
74.8%
95.7/114
284/339
.437/.413

438/331
75.6%
96.8/117
287/346
.398/.38

350/256
73.2%
-
.486/.385

Brodix Big Duke - PB 1800 18 Deg Alum

415/-

2.40/1.90
4.60

141/126
89.4%

200/166
83%
44.2/58.5
131/173
.606/.635

263/200
76%
58.1/70.5
172/209
.597/.574

322/225
69.9%
71.2/79.4
211/235
.585/.516

370/242
65.4%
81.8/85.4
242/253
.56/.463

407/253
62.2%
90/89.2
267/264
.528/.415

418/257
61.5%
92.4/90.6
274/269
.475/.369

303/210
69.3%
1.01
.486/.385

Brodix Big Duke - PB 1800 18 Deg Ported Alum

415/-

2.40/1.90
4.60

165/126
76.4%

242/180
74.4%
53.5/63.5
158/188
.733/.688

318/236
74.2%
70.3/83.2
208/247
.722/.677

388/296
76.3%
85.8/104
254/309
.705/.679

430/313
72.8%
95.1/110
282/327
.651/.599

463/319
68.9%
102/113
303/333
.601/.523

483/338
70%
107/119
316/353
.548/.485

356/258
72.6%
1.16
.486/.385

Brodix Big Duke - PB 1801 18 Deg Ported Alum

375/-

2.40/1.90
4.50

162/129
79.6%

245/180
73.5%
54.2/63.5
160/188
.742/.688

312/222
71.2%
69/78.3
204/232
.709/.637

367/269
73.3%
81.1/94.9
240/281
.667/.617

411/301
73.2%
90.9/106
269/315
.622/.576

442/308
69.7%
97.7/109
289/322
.574/.505

463/315
68%
102/111
303/329
.526/.452

343/246
71.8%
1.23
.486/.385

Brodix Big Duke - PB 1802 18 Deg Alum

456/-

2.40/1.90
4.60

146/112
76.7%

216/159
73.6%
47.7/56.1
141/166
.654/.608

289/199
68.9%
63.9/70.2
189/208
.656/.571

359/233
64.9%
79.4/82.2
235/243
.652/.535

417/266
63.8%
92.2/93.8
273/278
.631/.509

454/287
63.2%
100/101
297/300
.589/.47

478/300
62.8%
106/106
313/314
.543/.43

495/308
62.2%
109/109
324/322
.50/.393

357/233
65.3%
1.09
.486/.385

Brodix Big Duke - PB 1802 18 Deg CNC Chamber Alum

456/-

2.40/1.90

N/A

156/135
86.5%

230/180
78.3%
50.8/63.5
151/188
.696/.688

305/219
71.8%
67.4/77.2
200/229
.693/.628

361/252
69.8%
79.8/88.9
236/263
.656/.578

414/294
71%
91.5/104
271/307
.627/.562

453/306
67.5%
100/108
297/320
.588/.502

476/313
65.8%
105/110
312/327
.541/.449

342/243
70.9%
1.04
.486/.385

Brodix Big Duke - PB 1803 18 Deg CNC Chamber Alum

413/-

2.45/1.86

137/110
80.3%

217/162
74.7%
46/59.6
136/177
.644/.633

296/204
68.9%
62.8/75.1
186/222
.659/.598

362/238
65.7%
76.8/87.6
228/260
.644/.558

418/265
63.4%
88.7/97.5
263/289
.62/.518

464/288
62.1%
98.4/106
292/314
.59/.482

484/320
66.1%
103/118
304/349
.538/.469

490/328
66.9%
104/121
308/358
.484/.427

359/239
66.8%
1.19
.496/.377

Brodix Big Duke - BP PB 1803 18 Deg CNC Alum

410/-

2.45/1.86

91/95

145/126
86.9%

224/172
76.8%
47.5/63.3
141/188
.664/.672

300/211
70.3%
63.6/77.7
189/230
.667/.618

369/245
66.4%
78.3/90.2
232/267
.657/.574

425/270
63.5%
90.2/99.4
267/294
.63/.527

475/318
66.9%
101/117
299/347
.604/.532

500/338
67.6%
106/124
314/369
.556/.495

515/351
68.2%
109/129
324/383
.509/.457

369/254
68.8%
1.26
.496/.377

Brodix Big Duke - KC PB 1803 18 Deg CNC M2 Race Systems Alum

410/-

2.45/1.86

138/116
84.1%

218/164
75.2%
46.2/60.4
137/179
.647/.641

300/204
68%
63.6/75.1
189/222
.667/.598

364/235
64.6%
77.2/86.5
229/256
.648/.551

420/266
63.3%
89.1/97.9
264/290
.623/.52

460/294
63.9%
97.6/108
289/321
.585/.492

489/323
66.1%
104/119
307/352
.544/.473

505/343
67.9%
107/126
317/374
.499/.447

362/243
67.2%
1.23
.496/.377

Brodix Big Duke 12 Deg CNC Slick Rick Racing Heads Alum

N/A

2.52/1.86
-
No Pipe

N/A

233/168
72.1%
46.7/61.8
138/183
.672/.656

322/225
69.9%
64.6/82.8
191/245
.696/.659

399/293
73.4%
80/108
237/320
.69/.687

468/327
69.9%
93.8/120
278/357
.675/.639

512/340
66.4%
103/125
304/371
.633/.569

535/348
65%
107/128
318/379
.579/.51

550/352
64%
110/130
327/384
.529/.458

556/355
63.8%
111/131
330/387
.481/.416

563/357
63.4%
113/131
334/389
.443/.38

460/307
66.8%
-
.510/.377

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Brodix - KC PB 1600 16 Deg Ported Alum

416/-

2.45/1.86

147/113
76.9%

232/177
76.3%
49.2/65.1
146/193
.688/.692

314/224
71.3%
66.6/82.4
197/244
.699/.656

383/274
71.5%
81.2/101
241/299
.682/.642

439/310
70.6%
93.1/114
276/338
.651/.606

482/333
69.1%
102/123
303/363
.613/.558

506/340
67.2%
107/125
318/371
.563/.498

515/345
67%
109/127
324/376
.509/.449

377/265
70.1%
1.24
.496/.377

Brodix - KC PB 5000 5.0 Inch BS 15 Deg CNC Alum

506/-

2.52/1.86

154/116
75.3%

237/172
72.6%
47.5/63.3
141/188
.683/.672

323/219
67.8%
64.8/80.6
192/239
.699/.642

398/263
66.1%
79.8/96.8
236/287
.689/.617

437/297
68%
87.6/109
260/324
.63/.58

506/330
65.2%
101/121
301/360
.625/.553

539/351
65.1%
108/129
320/383
.583/.514

557/364
65.4%
112/134
331/397
.535/.474

394/264
67%
1.10
.510/.377

Brodix / Sonny's PB 2005 14.5 Deg I-55 E-55 Alum

490/-

2.52/1.86

129/111
86%

199/156
78.4%
39.9/57.4
118/170
.574/.61

287/196
68.3%
57.5/72.1
170/214
.621/.574

334/231
69.2%
67/85
198/252
.578/.542

431/258
59.9%
86.4/95
256/281
.621/.504

482/274
56.8%
96.6/101
286/299
.596/.459

517/287
55.5%
104/106
307/313
.559/.421

540/293
54.3%
108/108
321/320
.519/.382

365/226
61.9%
1.10
.510/.377

Brodix / Sonny's PB 2005 14.5 Deg Minor Port I-55 E-55 Alum

490/-

2.52/1.86

153/132
86.3%

241/187
77.6%
48.3/68.8
143/204
.695/.731

323/227
70.3%
64.8/83.5
192/248
.699/.665

395/258
65.3%
79.2/95
235/281
.683/.605

452/289
63.9%
90.6/106
269/315
.652/.565

499/326
65.3%
100/120
296/355
.617/.546

517/338
65.4%
104/124
307/369
.559/.495

540/343
63.5%
108/126
321/374
.519/.447

390/263
67.3%
1.10
.510/.377

Brodix / Sonny's STS PB 2005 14.5 Deg E-Tulip I-55 E-55 Alum

N/A

2.52/1.86

N/A

144/119
82.6%

222/182
82%
44.5/67
132/198
.64/.711

309/229
74.1%
62/84.3
184/250
.668/.671

384/265
69%
77/97.5
228/289
.664/.621

451/301
66.7%
90.4/111
268/328
.65/.588

505/333
65.9%
101/123
300/363
.624/.558

548/357
65.1%
110/131
326/389
.593/.523

563/362
64.3%
113/133
334/395
.541/.471

391/269
68.7%
-
.510/.377

Brodix EB 650 Alum

N/A

2.475/1.92

N/A

105/88
83.8%

181/130
71.8%

255/173
67.8%
53/59.8
157/177
.749/.655

330/214
64.8%
68.6/73.9
203/219
.727/.608

395/268
67.8%
82.1/92.6
243/274
.696/.609

450/307
68.2%
93.5/106
277/314
.661/.581

482/335
69.5%
100/116
297/343
.607/.543

498/344
69.1%
104/119
307/352
.548/.488

370/253
68.4%
-
.501/.389

Brodix PB 1200 12 Deg CNC Alum

483/-

2.52/1.86

147/126
85.7%

227/180
79.3%
45.5/66.2
135/196
.655/.703

312/224
71.8%
62.6/82.4
185/244
.675/.656

388/264
68%
77.8/97.2
230/288
.671/.619

460/305
66.3%
92.2/112
273/333
.663/.596

509/319
62.7%
102/117
302/348
.629/.534

545/333
61.1%
109/123
324/363
.589/.488

571/338
59.2%
114/124
339/369
.549/.44

395/261
66.1%
1.18
.510/.377

Brodix PB 1200 12 Deg CNC Alum

483/-

2.52/1.86

68/72

151/126
83.4%

235/180
76.6%
47.1/66.2
140/196
.678/.703

323/224
69.3%
64.8/82.4
192/244
.699/.656

395/264
66.8%
79.2/97.2
235/288
.683/.619

459/305
66.4%
92/112
273/333
.662/.596

513/319
62.2%
103/117
305/348
.634/.534

549/333
60.7%
110/123
326/363
.594/.488

563/338
60%
113/124
334/369
.541/.44

399/261
65.5%
1.17
.510/.377

Brodix PB 1201 12 Deg CNC Alum

480/-

2.45/1.86

156/122
78.2%

249/176
70.7%
52.8/64.8
156/192
.739/.688

332/231
69.6%
70.4/85
209/252
.739/.677

398/276
69.3%
84.4/102
250/301
.708/.647

460/300
65.2%
97.6/110
289/327
.682/.586

499/303
60.7%
106/112
314/330
.634/.507

522/339
64.9%
111/125
328/370
.581/.497

530/340
64.2%
112/125
333/371
.524/.443

393/261
66.3%
1.10
.496/.377

Brodix PB 1201 12 Deg CNC Alum

480/-

2.45/1.86

68/72

151/122
80.8%

243/176
72.4%
51.5/64.8
153/192
.721/.688

330/231
70%
70/85
207/252
.734/.677

400/276
69%
84.8/102
251/301
.712/.647

454/300
66.1%
96.3/110
285/327
.673/.586

495/303
61.2%
105/112
311/330
.629/.507

521/339
65.1%
111/125
327/370
.58/.497

533/340
63.8%
113/125
335/371
.527/.443

391/261
66.7%
1.11
.496/.377

Brodix KC PB 1202 12 Deg CNC Alum

497/-

2.48/1.86

66/70

154/122
79.2%

247/174
70.4%
51.1/64
152/190
.724/.68

332/229
69%
68.7/84.3
204/250
.73/.671

401/274
68.3%
83/101
246/299
.705/.642

468/303
64.7%
96.9/112
287/330
.686/.592

509/328
64.4%
105/121
312/358
.639/.549

535/338
63.2%
111/124
328/369
.588/.495

553/339
61.3%
114/125
339/370
.54/.442

400/263
65.9%
1.11
.502/.377

Brodix KC PB 1204 12 Deg CNC Alum

510/-

2.52/1.86

71/75

157/116
73.9%

216/169
78.2%
43.3/62.2
128/184
.623/.66

298/221
74.2%
59.7/81.3
177/241
.645/.648

369/261
70.7%
74/96.1
219/285
.638/.612

434/321
74%
87/118
258/350
.626/.627

489/344
70.3%
98/127
290/375
.604/.576

542/358
66.1%
109/132
322/390
.586/.525

578/370
64%
116/136
343/403
.556/.482

385/270
70.1%
1.13
.510/.377

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Brodix PB 5000 16 Deg 5.0 BS CNC Alum

515/-

2.52/1.86

154/116
75.3%

237/172
72.6%
47.5/63.3
141/188
.683/.672

323/219
67.8%
64.8/80.6
192/239
.699/.642

398/263
66.1%
79.8/96.8
236/287
.689/.617

461/297
64.4%
92.4/109
274/324
.665/.58

506/330
65.2%
101/121
301/360
.625/.553

539/351
65.1%
108/129
320/383
.583/.514

557/364
65.4%
112/134
331/397
.535/.474

397/264
66.5%
1.08
.510/.377

Brodix PB 5001 16 Deg 5.0 BS CNC Alum

515/-

2.52/1.86

156/119
76.3%

245/169
69%
49.1/62.2
146/184
.707/.66

338/217
64.2%
67.8/79.9
201/237
.731/.636

415/261
62.9%
83.2/96.1
247/285
.718/.612

471/301
63.9%
94.4/111
280/328
.679/.588

511/343
67.1%
102/126
304/374
.632/.574

545/367
67.3%
109/135
324/400
.589/.538

566/382
67.5%
113/141
336/417
.544/.498

406/270
66.5%
1.10
.510/.377

Brodix PB 5002 16 Deg 5.0 BS CNC Alum

509/-

2.52/1.86

148/113
76.4%

242/167
69%
48.5/61.5
144/182
.698/.652

335/217
64.8%
67.2/79.9
199/237
.725/.636

406/254
62.6%
81.4/93.5
241/277
.703/.595

464/316
68.1%
93/116
276/345
.669/.617

505/348
68.9%
101/128
300/379
.624/.583

535/353
66%
107/130
318/385
.579/.517

546/359
65.8%
109/132
324/391
.525/.468

398/266
66.9%
1.07
.510/.377

Brodix - Texas Pro Stock Type Ported Slick Rick Racing Heads I-50 E-55 Alum

N/A

2.40/1.80

157/126
80.3%

248/160
64.5%
54.8/62.9
162/186
.751/.646

330-329/200
60.7%
72.8/78.6
216/233
.748/.606

402-394/235
59%
88/92.3
261/274
.723/.569

450-438/262
59%
98.1/103
291/305
.672/.529

470-466/278
59.4%
103/109
307/324
.607/.481

485-483/290
59.9%
107/114
317/338
.55/.439

500-488/298
60.3%
109/117
324/347
.499/.401

508-490/303
60.7%
110/119
327/353
.453/.367

510-490/308
61.6%
111/121
327/359
.413/.339

402/246
61.2%
-
.486/.365

Brodix SR20 Conventional Darin Morgan Alum

N/A

2.40/1.80

180-182/132
72.9%

263-266/180
68.1%
58.5/70.7
173/210
.801/.727

346-345/218
63.1%
76.4/85.7
226/254
.785/.66

409-411/257
62.7%
90.6/101
269/299
.745/.623

460-461/288
62.5%
102/113
302/335
.697/.581

488-484/311
64%
107/122
318/362
.631/.538

499-493/331
66.7%
110/130
325/385
.563/.501

503-502/340
67.7%
111/134
329/396
.507/.458

509/344
67.6%
113/135
333/401
.462/.417

406/267
65.7%
-
.486/.365

Canfield 305 Alum CHP

305/-

2.25/1.88
4.25
Pipe

114

75/61
81.3%

161/115
71.4%

215/163
75.8%
54.1/58.7
160/174
.694/.63

257/199
77.4%
64.6/71.7
192/212
.623/.577

303/228
75.2%
76.2/82.1
226/243
.587/.529

328/251
76.5%
82.5/90.4
244/268
.53/.485

339/265
78.2%
85.3/95.5
253/283
.469/.439

332/273
82.2%
83.5/98.3
247/291
.402/.396

276/213
77.2%
1.11
.456/.381

Canfield 310 Alum

310/100

2.25/1.88

113/
119/
125

72/74
102%

138/123
89.1%

204/176
86.3%
51.3/63.4
152/188
.659/.68

266/205
77.1%
66.9/73.8
198/219
.644/.594

318/237
74.5%
80/85.4
237/253
.616/.55

347/260
74.9%
87.3/93.7
259/278
.56/.503

353/273
77.3%
88.8/98.3
263/291
.489/.452

355/284
80%
89.3/102
265/303
.43/.412

283/223
78.6%
1.15/2.84
.456/.381

Canfield 310 VJ Bowl work Chad Speier Alum

315/-

2.25/1.88

N/A

155-153/-

217/-
54.6
162
.701

282-286/-
71.4
212
.688

329-330/-
82.9
246
.639

349-339/-
86.5
256
.556

352-340/-
87
258
.479

355-344/-
87.9
260
.423

343-353/-
87.5
259
.375

341-355/-
87.5
259
.337

302
-
1.11
.456/.381

Canfield 310 Ported CFM Technologies Alum

N/A

2.25/1.88

N/A

180/133
73.9%

259/182
70.3%
65.1/65.6
193/194
.837/.704

311/221
71.1%
78.2/79.6
232/236
.753/.641

348/250
71.8%
87.5/90.1
259/267
.674/.58

367/279
76%
92.3/101
273/298
.593/.539

373/295
79.1%
93.8/106
278/315
.516/.489

306/227
74%
-
.456/.381

Canfield 310 Ported Jim V Alum

N/A

2.25/1.88
-
No Pipe

N/A

152/132
86.8%

233/186
79.8%
58.6/67
174/199
.753/.719

295/228
77.3%
74.2/82.1
220/243
.715/.661

344/256
74.4%
86.5/92.2
256/273
.667/.594

371/280
75.5%
93.3/101
276/299
.599/.541

380/310
81.6%
95.6/112
283/331
.526/.514

-/326

-/330

296/232
78.4%
-
.456/.381

Canfield 310 Ported Foxwell Motorsports Alum

N/A

2.25/1.88

118

155-153/117
76%

221/158
71.5%
55.6/56.9
165/169
.714/.611

283-279/198
70.5%
70.7/71.3
209/211
.681/.574

335-321/232
70.7%
82.5/83.6
244/248
.636/.538

369-347/258
72.1%
90/92.9
267/275
.578/.499

386-367/279
74.1%
94.7/101
281/298
.521/.462

379-377/291
77%
95.1/105
282/311
.458/.422

300/219
73.1%
-
.456/.381

Canfield 310 Ported Foxwell Motorsports Alum

N/A

2.30/1.88
-
2.25" Pipe

N/A

161-159/113
70.6%

226-223/166
73.9%
54/59.8
160/177
.709/.642

292-289/201
69.2%
69.9/72.4
207/215
.688/.583

347-332/249
73.3%
81.7/89.7
242/266
.644/.578

386-360/280
75.1%
89.8/101
266/299
.589/.541

401-382/300
76.6%
94.2/108
279/320
.53/.497

404-395/316
79.1%
96.2/114
285/337
.473/.458

412-404/326
79.9%
98.2/117
291/348
.43/.42

323/244
75.4%
-
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Canfield Ported Foxwell Motorsports I-45 Alum

325/-

2.30/1.88
-
2 1/4 Pipe

N/A

158-151/116
75.1%

225-219/158
71.2%
53.4/56.9
158/169
.701/.611

290-283/195
68.1%
69/70.2
204/208
.679/.565

338-327/230
69.2%
80/82.9
237/245
.63/.533

373-352/256
70.6%
87.2/92.2
259/273
.573/.495

381-380/276
72.5%
91.6/99.4
271/295
.515/.457

390/287
73.6%
93.9/103
278/306
.462/.416

395-393/295
74.9%
94.8/106
281/315
.415/.38

315/227
71.9%
1.21
.466/.381

Canfield Ported Foxwell Motorsports I-45 Alum

335/-

2.30/1.88

N/A

164-163/-

231-230/-
55.5
164
.728

297-296/-
71.4
211
.703

348-330/-
81.6
242
.643

381-358/-
88.9
264
.584

402-382/-
94.3
280
.531

410-397/-
97.1
288
.478

415-407/-
98.9
293
.433

419-415/-
100
297
.395

336
-
1.24
.466/.381

Canfield Ported Foxwell Motorsports I-45 Alum

N/A

2.30/1.88
4.60

N/A

166/121
72.9%

245-247/170
69.1%
59.2/61.2
175/181
.777/.657

306-312/209
67.6%
74.4/75.3
220/223
.732/.606

353-346/243
69.5%
84.1/87.5
249/259
.663/.564

386-368/274
72.7%
90.7/98.7
269/292
.596/.53

406-387/300
75.7%
95.4/108
283/320
.537/.497

415-406/316
77%
98.8/114
293/337
.486/.458

423-415/330
78.8%
101/119
299/352
.441/.425

429-419/340
80.2%
102/122
302/363
.402/.394

344/256
74.4%
-
.466/.381

Canfield 310 Ported Jeff Birtchell Alum

N/A

2.25/1.88

N/A

186/140
75.3%

258/185
71.7%
64.9/66.6
192/197
.833/.715

313/226
72.2%
78.7/81.4
233/241
.758/.655

369/264
71.5%
92.8/95.1
275/282
.715/.612

397/289
72.8%
99.8/104
296/308
.641/.559

406/312
76.8%
102/112
303/333
.562/.517

411/316
76.9%
103/114
306/337
.498/.458

334/247
74%
-
.456/.381

Canfield Ported Champion Racing Heads SF600 Alum

N/A

2.25/1.88
4.40

N/A

186/143
76.9%

261/199
76.2%
65.6/71.7
194/212
.843/.769

313/246
78.6%
78.7/88.6
233/263
.758/.713

348/276
79.3%
87.5/99.4
259/295
.674/.64

357/292
81.8%
89.8/105
266/312
.577/.564

366/299
81.7%
92.1/108
273/319
.507/.495

305/243
79.5%
-
.456/.381

Canfield 320 Weingartner Racing I-BC E-Tuliped Alum

315/-

2.25/1.88
4.31
No Pipe

N/A

68-69/60
87.6%

135-133/134
100%

201-199/176
88%
50.3/63.4
149/188
.646/.68

259-260/206
79.4%
65.3/74.2
193/220
.629/.597

306-294/233
77.7%
75.5/83.9
224/249
.581/.54

326-305/245
77.7%
79.3/88.3
235/262
.51/.474

352-340/248
71.7%
87/89.3
258/265
.479/.411

333-328/251
75.9%
83.1/90.4
246/268
.40/.364

330-325/257
78.5%
82.4/92.6
244/274
.353/.331

323-319/262
81.6%
80.7/94.4
239/280
.311/.304

282/224
79.4%
1.10
.456/.381

Canfield 350 Alum

350/-

2.30/1.88
-
Pipe

113/
119/
125

82/74
90.2%

176/123
69.9%

250/175
70%
60.2/63
178/187
.79/.676

313/213
68.1%
75.3/76.7
223/227
.742/.618

350/256
73.1%
84.2/92.2
250/273
.664/.594

367/284
77.4%
88.3/102
262/303
.58/.549

376/309
82.2%
90.5/111
268/330
.509/.512

380/320
84.2%
91.5/115
271/342
.45/.464

381/322
84.5%
91.7/116
272/344
.401/.415

324/250
77.2%
1.09
.466/.381

Canfield CFE Ported Alum

N/A

420/-
-

Canfield 310 2012 Foxwell Motorsports Alum

N/A

2.25/1.88

N/A

165/122
73.9%

235-239/170
71.7%
59.6/61.2
177/181
.765/.657

301-294/212
71.3%
74.8/76.4
222/226
.721/.615

340-321/240
72.6%
83.1/86.5
246/256
.64/.557

358-339/261
74.9%
87.6/94
260/279
.563/.504

356-341/274
78.6%
87.6/98.7
260/292
.482/.454

351-348/281
80.4%
87.9/101
260/300
.423/.407

297/223
75.1%
-
.456/.381

Canfield 310 2012 Foxwell Motorsports CNC bowl blend Alum

312-309/-

2.25/1.88

N/A

170-172/123
71.9%

246-244/170
69.4%
61.6/61.2
183/181
.791/.657

311-295/212
70%
76.2/76.4
226/226
.734/.615

353-329/245
71.8%
85.8/88.3
254/262
.661/.568

373-354/274
75.4%
91.4/98.7
271/292
.587/.53

373-364/295
80.1%
92.7/106
275/315
.51/.489

373-370/309
83.2%
93.4/111
277/330
.45/.448

309/233
75.2%
-
.456/.381

CFE/BMF 310 Alum

317/150

2.30/1.88

116

397/304
76.6%
95.6/110
283/324
.47/.441

-
-
1.25/2.03
.466/.381

CFE 366310 Alum

310/150

2.30/1.88

119

259/174
67.2%
62.3/62.7
185/186
.818/.673

325/212
65.2%
78.2/76.4
232/226
.77/.615

374/250
66.8%
90/90.1
267/267
.709/.58

386/277
71.8%
92.9/99.8
275/296
.61/.535

393/292
74.3%
94.6/105
280/312
.532/.484

394/304
77.2%
94.8/110
281/324
.467/.441

355/252
70.8%
1.27/2.03
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

DART N.E. Mod. Oval Full Port Back Cut SF600

307-311/ 145

2.25/1.88
4.44
No Pipe

117

153-156/122
79%

223-224/163
72.9%
56.2/58.7
167/174
.722/.63

281-284/218
77.2%
71/78.5
211/233
.684/.632

314-330/260
80.7%
81/93.7
240/278
.624/.603

340-362/274
78.1%
88.3/98.7
262/292
.567/.53

356-370/283
78%
91.3/102
271/302
.502/.469

364-374/293
79.4%
92.8/106
275/313
.447/.425

295/230
78.1%
-
.456/.381

DART 265 Oval Super Mod. Alum

275/128

2.30/1.88
4.50
No Pipe

N/A

156/132
84.6%

216/169
78.2%
52/60.9
154/180
.682/.653

274/203
74.1%
65.9/73.1
195/217
.649/.589

310/230
74.2%
74.6/82.9
221/245
.588/.533

324/247
76.2%
78/89
231/264
.512/.477

329/255
77.5%
79.2/91.9
235/272
.446/.422

268/206
76.8%
1.20/1.99
.466/.381

DART 265 CNC Oval Super Mod. Alum

298/143

2.30/1.88
4.50
No Pipe

N/A

157/142
90.4%

222/190
85.6%
53.4/68.4
158/203
.701/.734

274/230
83.9%
65.9/82.9
195/245
.649/.667

309/263
85.1%
74.4/94.7
220/281
.586/.61

365/284
77.8%
87.9/102
260/303
.577/.549

380/294
77.4%
91.5/106
271/314
.515/.487

285/234
82.2%
1.28/2.06
.466/.381

DART 275 Oval CCM Alum

275/-

2.25/1.88
-
No Pipe

119

68/68
100%

151/115
76.2%

215/155
72.1%
54.1/55.8
160/165
.694/.599

259/192
74.1%
65.1/69.2
193/205
.627/.557

293/223
76.1%
73.7/80.3
218/238
.568/.517

315/244
77.5%
79.2/87.9
235/260
.509/.472

310/259
83.5%
78/93.3
231/276
.429/.429

257/198
77%
1.15
.456/.381

DART 308 Iron Eagle

308/129

2.25/1.88
4.50
No Pipe

119

157/136
86.6%

232/175
75.4%
58.3/63
173/187
.749/.676

291/210
72.2%
73.2/75.7
217/224
.705/.609

325/233
71.7%
81.7/83.9
242/249
.63/.54

347/249
71.8%
87.3/89.7
259/266
.56/.481

359/258
71.9%
90.3/92.9
268/275
.497/.427

363/266
73.3%
91.3/95.8
271/284
.44/.386

296/218
73.6%
1.18/2.06
.456/.381

DART 308 Eagle David Vizard Iron

308/129

2.25/1.88

119

204-201/173
85.4%
50.9/62.3
151/185
.654/.669

262-265/200
75.9%
66.3/72
196/213
.638/.58

306/226
73.9%
77/81.4
228/241
.593/.524

310-303/250
81.6%
77.1/90.1
228/267
.495/.483

353-350/259
73.7%
88.4/93.3
262/276
.487/.429

363-360/269
74.4%
90.9/96.9
269/287
.438/.39

299/230
76.9%
1.17/2.09
.456/.381

DART 308 Ported Eagle David Vizard Iron

N/A

2.25/1.88

119

229-222/179
79.4%
56.7/64.5
168/191
.728/.692

262-272/222
83.1%
67.2/80
199/237
.647/.644

300-303/250
82.9%
75.8/90.1
225/267
.584/.58

335-303/271
85%
80.2/97.6
238/289
.515/.524

370-354/280
77.3%
91/101
270/299
.501/.464

383/289
75.5%
96.3/104
285/308
.464/.419

310/249
80.2%
-
.456/.381

DART 308 Iron Eagle FlowMotion Performance SF-600 Ported Jim V - Marine

324/138

2.30/1.88
4.60

N/A

218-221/180
82%
52.8/64.8
157/192
.694/.696

292-287/242
83.6%
69.7/87.2
206/258
.686/.702

341-332/274
81.4%
81/98.7
240/292
.638/.636

376-359/295
80.3%
88.5/106
262/315
.581/.57

393-380/303
78.4%
93/109
276/323
.523/.502

396/307
77.5%
95.3/111
282/328
.469/.445

333/267
80.2%
1.22/2.22
.466/.381

DART 308 Super Mod.

316/128

2.25/1.88
4.50
No Pipe

N/A

153/132
86.3%

221/169
76.5%
55.6/60.9
165/180
.714/.653

275/203
73.8%
69.2/73.1
205/217
.666/.589

318/230
72.3%
80/82.9
237/245
.616/.533

348/247
71%
87.5/89
259/264
.562/.477

367/255
69.5%
92.3/91.9
273/272
.508/.422

280/206
73.5%
1.16/1.99
.456/.381

DART 320 Out of Box Bill Jones Alum

327/128

2.30/1.88

N/A

73/74
101%

143/148
103%

208/187
89.9%
50.1/67.4
148/200
.657/.723

246/217
88.2%
59.2/78.2
175/232
.583/.629

290/238
82.1%
69.8/85.7
207/254
.55/.552

320/247
77.2%
77/89
228/264
.506/.477

241/207
85.9%
0.98/1.93
.466/.381

DART 320 Super Mod. Alum

327/128

2.30/1.88
4.50
No Pipe

N/A

152/132
86.8%

216/169
78.2%
52/60.9
154/180
.682/.653

274/203
74.1%
65.9/73.1
195/217
.649/.589

316/230
72.8%
76.1/82.9
225/245
.599/.533

338/247
73.1%
81.4/89
241/264
.534/.477

351/255
72.6%
84.5/91.9
250/272
.475/.422

275/206
75%
1.07/1.99
.466/.381

DART 320 CNC Super Mod. Alum

321/ 123.1

2.25/1.88
-
No Pipe

119.1

157/126
80.3%

230/165
71.7%
57.8/59.4
171/176
.743/.638

284/199
70.1%
71.4/71.7
212/212
.688/.577

319/224
70.2%
80.2/80.7
238/239
.618/.52

335/236
70.4%
84.3/85
250/252
.541/.456

339/242
71.4%
85.3/87.2
253/258
.469/.401

339/246
72.6%
85.3/88.6
253/263
.411/.357

286/205
71.8%
1.06/2.00
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

DART 320 CNC Super Mod. Alum

346/143

2.30/1.88
4.50
No Pipe

119.1

157/142
90.4%

221/190
86%
53.2/68.4
158/203
.698/.734

280/230
82.1%
67.4/82.9
200/245
.664/.667

326/263
80.7%
78.5/94.7
232/281
.618/.61

365/284
77.8%
87.9/102
260/303
.577/.549

370/294
79.5%
89.1/106
264/314
.501/.487

287/234
81.6%
1.07/2.06
.466/.381

DART 335 CNC Weingartner Racing Alum

N/A

2.30/1.88
4.625
No Pipe

N/A

66-54/54
90%

125-122/109
88.3%

203-195/151
75.9%
47.9/54.4
142/161
.629/.584

276-258/180
67.4%
64.3/64.8
190/192
.633/.522

322-309/223
70.7%
75.9/80.3
225/238
.598/.517

365-340/250
70.9%
84.8/90.1
251/267
.557/.483

395-365/266
70%
91.5/95.8
271/284
.515/.441

391-380/276
71.6%
92.8/99.4
275/295
.457/.40

380-373/281
74.6%
90.6/101
269/300
.397/.362

383-375/284
74.9%
91.2/102
270/303
.359/.329

309/224
72.7%
-
.466/.381

DART 330 Iron Eagle Pro CNC

330/-

2.30/1.88
-
No Pipe

126

157/136
86.6%

232/175
75.4%
55.8/63
165/187
.733/.676

291/210
72.2%
70/75.7
208/224
.69/.609

325/233
71.7%
78.2/83.9
232/249
.616/.54

347/249
71.8%
83.5/89.7
247/266
.548/.481

359/258
71.9%
86.4/92.9
256/275
.486/.427

363/266
73.3%
87.4/95.8
259/284
.43/.386

296/218
73.6%
1.10
.466/.381

DART 345 Iron Eagle

345/129

2.30/1.88
4.50
No Pipe

119

158/136
86.1%

228/175
76.8%
54.9/63
163/187
.72/.676

289/210
72.7%
69.6/75.7
206/224
.685/.609

327/233
71.3%
78.7/83.9
233/249
.62/.54

358/249
69.6%
86.2/89.7
255/266
.566/.481

378/258
68.3%
91/92.9
270/275
.512/.427

390/266
68.2%
93.9/95.8
278/284
.462/.386

304/218
71.8%
1.13/2.06
.466/.381

DART 345 Eagle David Vizard Iron

345/129

2.30/1.88

119

79/56
70.9%

162-163/115
70.8%

249/167
67.1%
59.9/60.2
178/178
.787/.646

314-315/205
65.2%
75.7/73.8
224/219
.745/.594

356-350/225
63.7%
85/81.1
252/240
.669/.522

379-371/238
63.5%
90.3/85.7
267/254
.592/.46

384-377/248
65.2%
91.6/89.3
271/265
.515/.411

387-379/255
66.6%
92.2/91.9
273/272
.454/.37

317/208
65.5%
1.11/1.98
.466/.381

DART 345 Eagle Basic Ported David Vizard Iron

345/129

2.30/1.88

119

79/56
70.9%

165-166/118
71.3%

255-254/177
69.5%
61.3/63.8
181/189
.804/.684

325-324/228
70.3%
78.1/82.1
231/243
.769/.661

361-360/251
69.6%
86.8/90.4
257/268
.683/.582

387-382/270
70.2%
92.5/97.3
274/288
.607/.522

399-389/292
74.1%
94.8/105
281/312
.534/.484

406-394/299
74.8%
96.3/108
285/319
.474/.433

326/234
71.6%
1.16/2.32
.466/.381

DART 360 16500000 Kendrick Auto Alum

N/A

2.25/1.9

119

75/68
90.7%

136/99
72.8%

184/125
67.9%
46.3/44.1
137/131
.594/.478

220/152
69.1%
55.3/53.6
164/159
.533/.436

261/181
69.3%
65.6/63.8
194/189
.506/.415

294/195
66.3%
73.9/68.8
219/204
.475/.373

313/202
64.5%
78.7/71.2
233/211
.433/.331

235/159
67.8%
-
.456/.385

DART 360 16500000 Ported Kendrick Auto Alum

N/A

2.25/1.9

119

84/73
86.9%

157/108
68.8%

223/149
66.8%
56.1/52.6
166/156
.72/.57

270/181
67%
67.9/63.8
201/189
.654/.519

308/210
68.2%
77.5/74.1
230/219
.597/.482

348/237
68.1%
87.5/83.6
259/248
.562/.453

386/259
67.1%
97.1/91.3
288/271
.534/.425

282/191
67.6%
-
.456/.385

DART 360 Super Mod.

355/ 124.6

2.30/1.88
-
No Pipe

114.1

152/126
82.9%

220/165
75%
53/59.4
157/176
.695/.638

277/199
71.8%
66.7/71.7
198/212
.656/.577

324/224
69.1%
78/80.7
231/239
.614/.52

354/236
66.7%
85.2/85
252/252
.559/.456

369/242
65.6%
88.8/87.2
263/258
.50/.401

373/246
66%
89.8/88.6
266/263
.442/.357

296/205
69.5%
1.05/1.97
.466/.381

DART 360 Super Mod. Alum

366/128

2.30/1.88
4.50
No Pipe

N/A

154/132
85.7%

220/169
76.8%
53/60.9
157/180
.695/.653

279/203
72.8%
67.2/73.1
199/217
.661/.589

321/230
71.7%
77.3/82.9
229/245
.609/.533

346/247
71.4%
83.3/89
247/264
.547/.477

370/255
68.9%
89.1/91.9
264/272
.501/.422

282/206
73.1%
1.01/1.99
.466/.381

DART 360 CNC Super Mod. Alum

389/143

2.30/1.88
4.50
No Pipe

119

157/142
90.4%

223/190
85.2%
53.7/68.4
159/203
.705/.734

284/230
81%
68.4/82.9
203/245
.673/.667

337/263
78%
81.1/94.7
240/281
.639/.61

374/284
75.9%
90/102
267/303
.591/.549

393/294
74.8%
94.6/106
280/314
.532/.487

295/234
79.4%
1.01/2.06
.466/.381

DART 360 Out of Box Weingartner Racing Alum

N/A

2.30/1.85
4.50
No Pipe

N/A

77/66
85.7%

154/107
69.5%

234/147
62.8%
56.3/54.7
167/162
.739/.577

288/183
63.5%
69.3/68.1
205/202
.682/.539

326/210
64.4%
78.5/78.1
232/231
.618/.495

360/230
63.9%
86.6/85.6
257/254
.569/.452

363/244
67.2%
87.4/90.8
259/269
.492/.411

368/250
67.9%
88.6/93
262/276
.436/.368

299/196
65.5%
-
.466/.375

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

DART 360 Out of Box Weingartner Racing Brez Alum

N/A

2.30/1.85
4.31
No Pipe

N/A

75/66
88%

166/107
64.5%

235/147
62.6%
56.6/54.7
168/162
.743/.577

283/183
64.7%
68.1/68.1
202/202
.671/.539

327/210
64.2%
78.7/78.1
233/231
.62/.495

351/230
65.5%
84.5/85.6
250/254
.555/.452

365/244
66.8%
87.9/90.8
260/269
.494/.411

378/257
68%
91/95.6
270/283
.448/.379

301/197
65.5%
-
.466/.375

DART 360 CNC Rons Porting Service Alum

N/A

2.30/1.90
-
No Pipe

N/A

185/142
76.8%

260/183
70.4%
62.6/64.5
185/191
.822/.70

321/214
66.7%
77.3/75.5
229/224
.761/.614

357/251
70.3%
85.9/88.5
255/262
.677/.576

389/282
72.5%
93.6/99.5
277/295
.615/.539

406/298
73.4%
97.7/105
290/311
.55/.488

420/307
73.1%
101/108
300/321
.498/.44

429/318
74.1%
103/112
306/332
.452/.405

346/249
72.1%
-
.466/.385

DART 370 CNC Oval Full Port Back Cut SF600

370/152

2.30/1.88
4.50
No Pipe

125

176-175/135
76.9%

243-238/187
77.8%
57.9/67.4
172/200
.76/.723

305-302/231
76.1%
73/83.2
216/247
.719/.67

348-350/280
80.2%
84/101
249/299
.662/.649

381-385/292
76.2%
92.2/105
273/312
.605/.564

403-411/310
76.2%
98/112
290/331
.551/.514

410-420/319
76.9%
99.9/115
296/340
.492/.462

325/251
77.1%
1.12/2.10
.466/.381

DART Conventional 22.25 Deg - Texas Pro Stock CNC Darin Morgan SF600 Alum

N/A

2.375/1.85
-
No Pipe

N/A

135-138/-

228/-
51.5
152
.698

312-315/-
70.8
210
.719

375-378/-
85
252
.691

427-431/-
96.8
287
.656

459-471/-
105
311
.61

477-489/-
109
323
.554

480-501/-
111
328
.50

485-507/-
112
332
.455

380
-
-
.481/.375

DART 360 Rolled 22 Deg - 2009 Texas Pro Stock CNC Darin Morgan SF600 Alum

N/A

2.375/1.85
-
No Pipe

N/A

141-138/-

228/-
51.5
152
.698

315/-
71.1
211
.723

384-378/-
86
255
.70

426-431/-
96.7
287
.656

456-471/-
105
310
.608

465-489/-
108
319
.547

477-501/-
110
327
.499

480-507/-
111
330
.453

379
-
-
.481/.375

DART 360 Rolled 22 Deg - 2010 Texas Pro Stock CNC Darin Morgan SF600 Alum

N/A

2.375/1.85
-
No Pipe

N/A

149-150/-

237/-
53.5
159
.725

315/-
71.1
211
.723

384-385/-
86.8
257
.706

434-439/-
98.5
292
.668

463-480/-
106
315
.618

481-504/-
111
329
.565

495-510/-
113
336
.513

501-516/-
115
340
.467

389
-
-
.481/.375

DART PRO1 275 Alum

275/-

2.25/1.88
-
No Pipe

121

154/136
88.3%

225/175
77.8%
56.6/63
168/187
.727/.676

284/210
73.9%
71.4/75.7
212/224
.688/.609

318/233
73.3%
80/83.9
237/249
.616/.54

341/249
73%
85.8/89.7
254/266
.551/.481

352/258
73.3%
88.5/92.9
262/275
.487/.427

279/210
75.3%
1.28
.456/.381

DART PRO1 Ported BES Alum

333/-

2.30/1.88

129.7

166/136
81.9%

234/186
79.5%
56.3/67
167/199
.739/.719

296/232
78.4%
71.2/83.6
211/248
.701/.673

345/262
75.9%
83/94.4
246/280
.654/.608

373/290
77.7%
89.8/104
266/310
.589/.561

388/309
79.6%
93.4/111
277/330
.525/.512

392/326
83.2%
94.3/117
280/348
.464/.473

398/344
86.4%
95.8/124
284/367
.419/.443

324/261
80.4%
1.20
.466/.381

DART PRO1 310 Alum

310/129

2.25/1.88
4.50
No Pipe

121

147/137
93.2%

219/175
79.9%
55.1/63
163/187
.707/.676

275/210
76.4%
69.2/75.7
205/224
.666/.609

318/233
73.3%
80/83.9
237/249
.616/.54

347/249
71.8%
87.3/89.7
259/266
.56/.481

364/258
70.9%
91.5/92.9
271/275
.504/.427

369/266
72.1%
92.8/95.8
275/284
.447/.386

291/218
74.9%
1.19/2.06
.456/.381

DART PRO1 310 Ported Jim V Alum

320/-

2.25/1.88
-
No Pipe

N/A

149/130
87.2%

225/171
76%
56.6/61.6
168/183
.727/.661

295/206
69.8%
74.2/74.2
220/220
.715/.597

348/256
73.6%
87.5/92.2
259/273
.674/.594

380/286
75.3%
95.6/103
283/305
.614/.553

394/300
76.1%
99.1/108
294/320
.545/.497

299/225
75.3%
1.23
.456/.381

DART PRO1 325 Alum

325/129

2.25/1.88
4.50
No Pipe

121

147/137
93.2%

223/175
78.5%
56.1/63
166/187
.72/.676

281/210
74.7%
70.7/75.7
209/224
.681/.609

326/233
71.5%
82/83.9
243/249
.632/.54

353/249
70.5%
88.8/89.7
263/266
.57/.481

371/258
69.5%
93.3/92.9
276/275
.514/.427

376/266
70.7%
94.6/95.8
280/284
.455/.386

297/218
73.6%
1.16/2.06
.456/.381

DART PRO1 335 CNC Alum

335/138

2.30/1.88
4.50
No Pipe

N/A

174/136
78.2%

245/178
72.7%
59/64.1
175/190
.774/.688

306/235
76.8%
73.7/84.7
218/251
.725/.681

353/265
75.1%
85/95.5
252/283
.669/.615

383/282
73.6%
92.2/102
273/301
.605/.545

401/296
73.8%
96.5/107
286/316
.543/.49

406/303
74.6%
97.7/109
290/323
.481/.439

324/242
74.7%
1.21/2.20
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

DART PRO1 345 Alum

345/129

2.30/1.88
4.50
No Pipe

121

143/136
95.1%

214/175
81.8%
51.5/63
153/187
.676/.676

272/210
77.2%
65.5/75.7
194/224
.645/.609

321/233
72.6%
77.3/83.9
229/249
.609/.54

359/249
69.4%
86.4/89.7
256/266
.567/.481

384/258
67.2%
92.4/92.9
274/275
.52/.427

397/266
67%
95.6/95.8
283/284
.47/.386

299/218
73.1%
1.15/2.06
.466/.381

DART PRO1 355 CNC Alum

355/138

2.30/1.88
4.50
No Pipe

N/A

177/136
76.8%

251/178
70.9%
60.4/64.1
179/190
.793/.688

310/235
75.8%
74.6/84.7
221/251
.735/.681

360/265
73.6%
86.6/95.5
257/283
.682/.615

399/282
70.7%
96/102
285/301
.63/.545

423/296
70%
102/107
302/316
.573/.49

426/303
71.1%
103/109
304/323
.505/.439

335/242
72.3%
1.20/2.20
.466/.381

DART PRO1 355 CNC David Vizard Alum

N/A

2.30/1.88

119

77/58
75.3%

171/123
71.9%

253/175
69.2%
60.9/63
180/187
.799/.676

325/225
69.2%
78.2/81.1
232/240
.77/.652

360/250
69.4%
86.6/90.1
257/267
.682/.58

378-373/272
72.4%
90.4/98
268/290
.593/.526

400-388/292
74.1%
94.8/105
281/312
.534/.484

414-395/303
74.9%
97.4/109
288/323
.479/.439

423-399/306
74.5%
98.9/110
293/327
.433/.394

337/243
72.2%
-
.466/.381

DART 355 CNC Foxwell Motorsports Alum

N/A

2.30/1.88
4.50

N/A

154-156/117
75.5%

223-226/163
72.6%
54/58.7
160/174
.709/.63

293-290/227
77.9%
70.2/81.8
208/242
.691/.658

338-333/266
79.3%
80.8/95.8
239/284
.636/.617

375-366/288
77.7%
89.2/104
264/307
.585/.557

401-383/302
77%
94.3/109
280/322
.531/.50

409-396/307
76.3%
96.9/111
287/328
.477/.445

417-407/321
77.9%
99.2/116
294/343
.434/.414

425-417/331
78.6%
101/119
300/353
.399/.384

334/258
77.3%
-
.466/.381

DART PRO2 Ported SF600 Alum

380/144

2.30/1.88

119

176/134
76.1%

239/178
74.5%
57.5/64.1
170/190
.755/.688

304/223
73.4%
73.2/80.3
217/238
.72/.647

346/274
79.2%
83.3/98.7
247/292
.656/.636

378/300
79.4%
91/108
270/320
.597/.58

402/318
79.1%
96.8/115
287/339
.544/.527

420/330
78.6%
101/119
300/352
.498/.478

430/338
78.6%
103/122
307/361
.453/.436

438/346
79%
105/125
312/369
.415/.401

348/271
77.9%
1.15/2.40
.466/.381

DART SR2 - Texas Pro Stock Ported Slick Rick Racing Heads Alum

N/A

2.425/-

N/A

240/-
52
154
.719

322/-
69.7
207
.724

392/-
84.9
251
.705

449/-
97.2
288
.673

488/-
106
313
.627

497/-
108
319
.559

510/-
110
327
.509

518/-
112
332
.466

525/-
114
337
.429

438
-
-
.491

DART Big M Super Mod. Ported Alum

411/147

2.35/1.88
4.60
No Pipe

N/A

160/124
77.5%

223/159
71.3%
51.4/57.3
152/170
.69/.615

285/196
68.8%
65.7/70.6
195/209
.661/.568

336/243
72.3%
77.5/87.5
230/259
.623/.564

377/268
71.1%
86.9/96.5
258/286
.583/.518

401/283
70.6%
92.5/102
274/302
.531/.469

415/295
71.1%
95.7/106
283/315
.481/.428

314/224
71.4%
1.01/2.01
.476/.381

DART Big M Super Mod. Ported Full Polish Alum

411/147

2.35/1.88
4.60
No Pipe

N/A

161/124
77%

235/159
67.7%
54.2/57.3
161/170
.727/.615

302/196
64.9%
69.6/70.6
206/209
.70/.568

357/243
68.1%
82.3/87.5
244/259
.662/.564

394/268
68%
90.8/96.5
269/286
.609/.518

418/283
67.7%
96.4/102
286/302
.554/.469

429/295
68.8%
98.9/106
293/315
.498/.428

328/224
68.3%
1.04/2.01
.476/.381

DART 18 Deg Oval Alum

330/152

2.25/1.84
-
No Pipe

190/120
63.2%

254/164
64.6%
63.9/61.7
189/183
.82/.648

318/191
60.1%
80/71.8
237/213
.77/.566

377/222
58.9%
94.8/83.5
281/247
.731/.526

404/257
63.6%
102/96.7
301/286
.652/.508

412/301
73.1%
104/113
307/335
.57/.51

413/301
72.9%
104/113
308/335
.50/.446

338/222
65.7%
1.25/1.98
.456/.373

DART 18 Deg Oval CNC Alum

383/152

2.35/1.84
-
No Pipe

102

162/136
84%

236/177
75%
54.4/66.6
161/197
.73/.699

314/216
68.8%
72.4/81.2
215/241
.728/.64

376/254
67.6%
86.7/95.5
257/283
.698/.602

420/289
68.8%
96.8/109
287/322
.649/.571

444/316
71.2%
102/119
303/352
.588/.535

450/330
73.3%
104/124
307/368
.522/.489

343/245
71.5%
1.17/2.17
.476/.373

DART Big Chief 18 Deg PRO1 Alum

424/185

2.40/1.90
-
No Pipe

N/A

158/138
87.3%

222/185
83.3%
49.1/65.2
145/193
.672/.708

284/229
80.6%
62.8/80.8
186/239
.645/.657

345/267
77.4%
76.3/94.2
226/279
.627/.613

390/293
75.1%
86.2/103
255/306
.59/.56

420/30
7.19%
92.8/10.6
275/31.4
.545/4.96

431/305
70.8%
95.3/108
282/319
.489/.437

437/309
70.7%
96.6/109
286/323
.441/.394

336/220
65.4%
1.03/1.67
.486/.385

DART Late Big Chief 18 Deg CNC Super Mod. Alum

402/175

2.40/1.90
4.60
No Pipe

N/A

158/154
97.5%

234/211
90.2%
51.7/74.4
153/221
.709/.807

302/266
88.1%
66.8/93.8
198/278
.686/.763

365/282
77.3%
80.7/99.5
239/295
.663/.647

407/293
72%
90/103
267/306
.616/.56

432/297
68.8%
95.5/105
283/310
.561/.487

444/301
67.8%
98.1/106
291/315
.504/.432

335/258
77%
1.10/1.72
.486/.385

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

DART Late Big Chief 18 Deg Full Port 45 Deg Intake Back Cut Alum

421/186

2.40/1.90
4.60
No Pipe

N/A

165/141
85.5%

239/191
79.9%
52.8/67.4
157/200
.724/.731

294/237
80.6%
65/83.6
193/248
.668/.68

356/280
78.7%
78.7/98.8
233/293
.647/.643

410/315
76.8%
90.6/111
269/329
.621/.602

445/333
74.8%
98.4/117
291/348
.577/.546

461/339
73.5%
102/120
302/354
.523/.486

469/351
74.8%
104/124
307/367
.473/.448

355/273
77%
1.11/1.89
.486/.385

DART Big Chief 18 Deg Ported ET Performance Alum

N/A

2.40/1.88
4.50

N/A

77-79/61
78.2%

160-161/130
81%

222-225/180
80.5%
49.4/64.8
146/192
.677/.696

301-297/232
77.6%
66.1/83.6
196/248
.679/.673

369-362/274
75%
80.8/98.7
239/292
.664/.636

410-417/290
70.1%
91.4/104
271/310
.626/.561

433-451/308
69.7%
97.7/111
289/329
.574/.51

454-469/320
69.3%
102/115
302/342
.524/.464

471-478/331
69.8%
105/119
311/353
.479/.427

355/258
72.7%
-
.486/.381

DART Big Chief 18 Deg Ported MBE I-55 E-55 SF1020 Alum

430/195

2.45/1.80
4.52
No Pipe

90-100

148/122
82.4%

220/182
82.7%
46.7/71.5
138/212
.653/.735

293/234
79.9%
62.2/92
184/272
.652/.709

362/282
77.9%
76.8/111
228/328
.644/.683

417/315
75.5%
88.5/124
262/367
.618/.636

463/334
72.1%
98.2/131
291/389
.589/.578

494/336
68%
105/132
310/391
.55/.509

513/337
65.7%
109/132
322/392
.507/.454

522/335
64.2%
111/132
328/390
.465/.406

528/-
112
332
.427

396/275
-
1.23/1.73
.496/.365

DART Big Chief 18 Deg Ported Chapman Alum

422/-

2.40/1.90
-
No Pipe

91.5

80/63
78.8%

160/124
77.5%

244/174
71.3%
53.9/61.4
160/182
.739/.666

307/212
69.1%
67.9/74.8
201/222
.697/.608

359/244
68%
79.4/86.1
235/255
.652/.56

401/272
67.8%
88.6/95.9
263/284
.607/.52

440/331
75.2%
97.3/117
288/346
.571/.543

466/346
74.2%
103/122
305/362
.529/.496

472/350
74.2%
104/123
309/366
.476/.446

356/257
72.1%
1.12
.486/.385

DART Big Chief 18 Deg CNC Slick Rick Racing Heads Alum

N/A

2.43/1.85
-
No Pipe

N/A

239/199
83.3%
51.5/74
153/219
.715/.782

309/245
79.3%
66.6/91.1
197/270
.693/.722

370/302
81.6%
79.8/112
236/333
.664/.712

424/342
80.7%
91.4/127
271/377
.634/.672

464/355
76.5%
100/132
296/391
.595/.598

496/362
73%
107/135
317/399
.556/.533

515/366
71.1%
111/136
329/403
.513/.479

525/370
70.5%
113/138
335/408
.471/.436

535/370
69.2%
115/138
342/408
.436/.396

431/323
75.1%
-
.492/.375

DART 18 Deg CNC Full Alum

424/185

-
-
No Pipe

492/343
69.7%
-

-
-
1.16/1.85

DART PRO1 18 Deg CNC Bowls Alum

421/-

2.40/1.90
4.60
No Pipe

N/A

470/340
72.3%
104/120
308/355
.474/.433

-
-
1.12
.486/.385

DART 14 Deg Olds Full Port Alum - CFE

440/-

2.40/1.90

N/A

245/204
83.3%
54.2/72
160/213
.742/.78

326/264
81%
72.1/93.1
214/276
.74/.757

376/312
83%
83.1/110
246/326
.683/.716

425/327
76.9%
93.9/115
278/342
.643/.625

457/330
72.2%
101/116
299/345
.593/.541

474/340
71.7%
105/120
310/355
.538/.488

475/341
71.8%
105/120
311/356
.479/.435

397/303
76.2%
1.08
.486/.385

DART 14 Deg Olds Full Port Alum

440/-

2.40/1.90
-
No Pipe

N/A

237/192
81%
52.4/67.7
155/201
.718/.734

303/247
81.5%
67/87.1
198/258
.688/.709

361/297
82.3%
79.8/105
236/310
.656/.682

412/317
76.9%
91.1/112
270/331
.624/.606

447/331
74%
98.8/117
293/346
.58/.543

457/341
74.6%
101/120
299/356
.519/.489

463/345
74.5%
102/122
303/361
.467/.44

383/296
77.2%
1.05
.486/.385

DART 14 Deg Olds Ported Dr Js Performance I-50 Sf600 Alum

N/A

2.45/-

N/A

167/-

245/-
52
154
.727

335/-
71.1
211
.745

415/-
88
261
.739

473/-
100
297
.702

515/-
109
324
.655

532/-
113
334
.592

549/-
116
345
.543

561/-
119
353
.499

567/-
120
356
.459

436
-
-
.496

DART Big Chief 14 Deg Oval Full Port I-55 E-55 Deg SF1020 Alum

433/200

2.47/1.80
-
No Pipe

164/129
78.7%

254/182
71.7%
53/71.5
157/212
.747/.735

333/218
65.5%
69.5/85.7
206/254
.735/.66

398/251
63.1%
83.1/98.6
246/292
.703/.608

446/288
64.6%
93.1/113
276/335
.656/.581

482/316
65.6%
101/124
298/368
.608/.547

493/338
68.6%
103/133
305/394
.544/.512

495/349
70.5%
103/137
306/406
.485/.47

383/259
67.6%
1.14/1.75
.500/.365

DART Big Chief 14 Deg Oval CNC Full Alum

433/-

2.47/1.80
4.60
No Pipe

N/A

515/365
70.9%
107/143
318/425
.505/.491

-
-
1.19
.500/.365

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

DART Big Chief 14 Deg Oval CNC M2 Race Systems Alum

448/-

2.45/1.85
4.60

144/114
79.2%

236/165
69.9%
50.1/61.4
148/182
.70/.648

299/210
70.2%
63.4/78.1
188/231
.665/.619

375/266
70.9%
79.5/99
236/293
.667/.627

440/306
69.5%
93.3/114
277/337
.653/.601

484/328
67.8%
103/122
304/362
.615/.552

518/342
66%
110/127
326/377
.576/.504

526/352
66.9%
112/131
331/388
.52/.461

534/356
66.7%
113/132
336/392
.475/.42

395/271
68.6%
1.19
.496/.375

DART Big Chief 14 Deg Ported ET Performance Alum

390/-

2.45/1.88
4.625

86-86/62
72.1%

160-160/129
80.6%

240-241/195
81.1%
51/70.2
151/208
.713/.754

309-308/261
84.6%
65.4/94
194/279
.686/.757

361-361/301
83.4%
76.6/108
227/321
.642/.698

409-407/318
77.9%
86.5/115
256/339
.605/.615

440-433/328
75.1%
92.6/118
274/350
.555/.543

453-451/334
73.9%
95.9/120
284/357
.503/.484

467-467/336
71.9%
99.1/121
294/359
.462/.433

354/275
77.7%
1.20
.496/.381

DART Big Chief 14 Deg Ported ET Performance Alum

440/-

2.45/1.88
4.625

90-95/62
67%

176-175/129
73.5%

263-261/195
74.4%
55.6/70.2
165/208
.777/.754

339-338/261
77.1%
71.8/94
213/279
.753/.757

406-403/301
74.4%
85.8/108
254/321
.72/.698

448-442/318
71.5%
94.4/115
280/339
.66/.615

470-465/328
70.2%
99.2/118
294/350
.594/.543

484-473/334
69.8%
101/120
301/357
.532/.484

494-487/336
68.5%
104/121
308/359
.485/.433

383/275
71.9%
1.11
.496/.381

DART Big Chief 14 Deg Ported MBE I-55 E-55 SF600 Alum

449/192

2.45/1.83
4.52
No Pipe

72-89

164/122
74.4%

235/182
77.4%
49.8/69.2
148/205
.697/.723

324/234
72.2%
68.7/89
204/264
.721/.697

396/282
71.2%
84/107
249/318
.705/.672

458/315
68.8%
97.2/120
288/355
.679/.625

500/334
66.8%
106/127
314/376
.636/.568

524/336
64.1%
111/128
329/379
.583/.50

525/337
64.2%
111/128
330/380
.519/.446

537/335
62.4%
114/127
338/377
.478/.399

407/275
67.6%
1.20/1.76
.496/.371

DART Big Chief 14 Deg 5.0 BS Alum

512/-

2.575/1.90
-
No Pipe

163/152
93.3%

260/203
78.1%
49.9/71.6
148/212
.734/.776

344/251
73%
66.1/88.5
196/262
.728/.72

413/302
73.1%
79.3/107
235/316
.699/.693

468/334
71.4%
89.9/118
266/349
.66/.639

512/356
69.5%
98.3/126
291/372
.619/.584

540/366
67.8%
104/129
307/382
.572/.525

551/371
67.3%
106/131
313/388
.518/.473

560/374
66.8%
108/132
319/391
.474/.429

423/301
71.1%
1.09
.521/.385

DART 11 Deg Big Chief II Oval Full Port 55 Deg SF1020 Alum

512/185

2.47/1.80
-
No Pipe

N/A

168/137
81.5%

261/198
75.9%
54.5/77.8
161/231
.768/.799

337/256
76%
70.3/101
208/298
.744/.775

404/301
74.5%
84.3/118
250/350
.713/.729

459/327
71.2%
95.8/129
284/381
.675/.66

498/336
67.5%
104/132
308/391
.628/.581

516/341
66.1%
108/134
319/397
.569/.516

518/342
66%
108/134
320/398
.508/.46

528/-
110
326
.466

410/280
-
1.03/1.85
.500/.365

DART 11 Deg Big Chief II Ported MBE I-55 E-55 SF600 Alum

492/185

2.52/1.80
4.52
No Pipe

50-90

172/122
70.9%

263/172
65.4%
52.7/67.6
156/200
.758/.694

334/215
64.4%
67/84.5
198/250
.722/.651

408/275
67.4%
81.8/108
242/320
.706/.666

465/302
64.9%
93.2/119
276/352
.67/.61

510/318
62.4%
102/125
303/370
.63/.55

535/327
61.1%
107/129
318/381
.579/.495

539/331
61.4%
108/130
320/385
.518/.445

551/335
60.8%
110/132
327/390
.477/.406

565/336
59.5%
113/132
336/391
.444/.37

434/273
62.9%
1.15/1.82
.510/.365

DART 11 Deg Big Chief Oval CNC Full Alum

512/-

2.47/1.80
4.60
No Pipe

N/A

545/360
66.1%
114/141
337/419
.535/.484

-
-
1.06
.500/.365

DART 11 Deg Big Chief Ported BES Alum

N/A

2.50/1.80

N/A

158/130
82.3%

249/185
74.3%
50.7/72.7
150/215
.724/.747

344/236
68.6%
70.1/92.7
208/275
.75/.715

424/294
69.3%
86.4/116
256/342
.74/.712

489/338
69.1%
99.6/133
295/394
.711/.682

527/366
69.4%
107/144
318/426
.657/.633

547/378
69.1%
111/149
330/440
.596/.572

545/384
70.5%
111/151
329/447
.528/.517

556/389
70%
113/153
336/453
.485/.471

427/300
70.3%
-
.506/.365

Edelbrock Victor Jr CNC Oval 60409, 60419 SF1020 Alum

320/118

2.25/1.90
-
No Pipe

112

86/64
74.4%

163/121
74.2%

244/169
69.3%
61.4/59.6
182/177
.788/.646

296/206
69.6%
74.4/72.7
221/215
.717/.591

323/236
73.1%
81.2/83.2
241/247
.626/.542

332/258
77.7%
83.5/91
247/270
.536/.493

341/276
80.9%
85.8/97.3
254/288
.472/.452

283/211
74.5%
1.07/2.34
.456/.385

Edelbrock Victor Jr CNC Rect 60409, 60419,60429, 60439 SF1020 Alum

295/118

2.25/1.90
-
No Pipe

112

86/64
74.4%

163/121
74.2%

244/169
69.3%
61.4/59.6
182/177
.788/.646

296/206
69.6%
74.4/72.7
221/215
.717/.591

323/236
73.1%
81.2/83.2
241/247
.626/.542

332/258
77.7%
83.5/91
247/270
.536/.493

341/276
80.9%
85.8/97.3
254/288
.472/.452

283/211
74.5%
1.16/2.34
.456/.385

Edelbrock/ Chapman 60429, 60439 Oval Ported Alum

295/118

2.25/1.90
-
No Pipe

112

86/64
74.4%

160/121
75.6%

236/169
71.6%
59.4/59.6
176/177
.762/.646

285/206
72.3%
71.7/72.7
212/215
.69/.591

307/236
76.9%
77.2/83.2
229/247
.595/.542

312/258
82.7%
78.5/91
233/270
.504/.493

315/276
87.6%
79.2/97.3
235/288
.436/.452

269/211
78.4%
1.07/2.34
.456/.385

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Edelbrock 60459, 60479, 60499, 61459 Performer RPM 454-O Alum

290/110

2.19/1.88

110/
112

74/71
95.9%

143/128
89.5%

207/153
73.9%
55/55.1
163/163
.687/.591

250/178
71.2%
66.4/64.1
197/190
.622/.516

284/200
70.4%
75.4/72
223/213
.565/.464

309-299/218
71.7%
80.7/78.5
239/233
.504/.421

238/175
73.8%
1.05/1.98
.443/.381

Edelbrock 60459 Performer RPM 454-O Wolfplace FlowData Alum

290/110

2.19/1.88
4.53
No Pipe

110

74-73/64
87.1%

146-148/119
81%

218/149
68.3%
57.9/53.7
171/159
.723/.576

260-268/179
67.8%
70.1/64.5
208/191
.657/.519

291-304/207
69.6%
79/74.6
234/221
.592/.48

307-327/229
72.2%
84.2/82.5
249/244
.526/.443

302-319/245
78.9%
82.4/88.3
244/262
.442/.406

259/188
72.6%
1.09/2.23
.443/.381

Edelbrock Performer 454-O 60479 SF1020 Alum

290/110

2.19/1.88

110

74/71
95.9%

143/128
89.5%

207/153
73.9%
55/55.1
163/163
.687/.591

250/178
71.2%
66.4/64.1
197/190
.622/.516

284/200
70.4%
75.4/72
223/213
.565/.464

309/218
70.6%
82/78.5
243/233
.513/.421

239/175
73.5%
1.07/1.98
.443/.381

Edelbrock Performer 454-O 60479 CCM Alum

290/110

2.19/1.88
-
No Pipe

110

66/58
87.9%

135/126
93.3%

196/149
76%
52/53.7
154/159
.65/.576

240/171
71.3%
63.7/61.6
189/183
.597/.496

264/189
71.6%
70.1/68.1
208/202
.526/.438

281/203
72.2%
74.6/73.1
221/217
.466/.392

286/213
74.5%
75.9/76.7
225/227
.407/.353

234/175
75%
0.99/1.94
.443/.381

Edelbrock Performer 454-O 60499 SF1020 Alum

290/110

2.19/1.88

110

73/71
97.3%

143/128
89.5%

208/153
73.6%
55.2/55.1
164/163
.69/.591

251/178
70.9%
66.6/64.1
197/190
.625/.516

284/200
70.4%
75.4/72
223/213
.565/.464

299/218
72.9%
79.4/78.5
235/233
.496/.421

237/175
74%
1.03/1.98
.443/.381

Edelbrock Performer RPM Xtreme 454-O 51459 SF1020 Alum

308-325/ 133

2.25/1.88
4.31

112

143/125
87.4%

223-221/172
77.5%
55.8/62
165/184
.717/.665

283-276/199
71.2%
70.3/71.7
208/212
.677/.577

318-315/217
68.6%
79.6/78.2
236/232
.613/.503

335-332/232
69.6%
83.9/83.6
249/248
.539/.448

337/243
72.1%
84.8/87.5
251/259
.466/.403

344-338/252
73.9%
85.8/90.8
254/269
.413/.365

282/206
73%
-
.456/.381

Edelbrock Performer RPM 454-R 60559 SF1020 Alum

315-300/ 110

2.19/1.88

118

76/70
92.1%

146/132
90.4%

212/156
73.6%
56.3/56.2
167/167
.704/.603

255/181
71%
67.7/65.2
201/193
.635/.525

294/207
70.4%
78/74.6
231/221
.585/.48

314/228
72.6%
83.4/82.1
247/243
.521/.441

244/181
74%
-
.443/.381

Edelbrock Performer RPM Xtreme 454-R 51539, %1559 SF1020 Alum

345/145

2.30/1.88

110/118

158/134
84.8%

237/190
80.2%
57/68.4
169/203
.749/.734

299/227
75.9%
72/81.8
213/242
.709/.658

344/255
74.1%
82.8/91.9
245/272
.652/.591

366/267
73%
88.1/96.2
261/285
.578/.516

377/272
72.1%
90.7/98
269/290
.511/.451

385/280
72.7%
92.7/101
275/299
.456/.406

309/232
75%
1.12/1.93
.466/.381

Edelbrock Performer RPM 6046 AirWolf 305 Oval Dr Js Performance Alum

305/-

2.30/1.88
4.31
2" Pipe

105/110/115

74/62
83.8%

145/123
84.8%

225/165
73.3%
54.2/59.4
160/176
.711/.638

286/190
66.4%
68.8/68.4
204/203
.678/.551

329/215
65.3%
79.2/77.5
235/229
.624/.499

355/235
66.2%
85.4/84.7
253/251
.561/.454

374/254
67.9%
90/91.5
267/271
.506/.421

381/271
71.1%
91.7/97.6
272/289
.451/.393

387/287
74.2%
93.1/103
276/306
.408/.37

396/299
75.5%
95.3/108
282/319
.375/.347

320/227
70.8%
1.30
.466/.381

Edelbrock 60559, 61559 Performer RPM 454-R Alum

315/110

2.19/1.88

118

76/70
92.1%

146/132
90.4%

210/156
74.3%
55.7/56.2
165/167
.697/.603

255/181
71%
67.7/65.2
201/193
.635/.525

294-284/207
71.6%
76.7/74.6
227/221
.575/.48

314-297/228
74.6%
81.1/82.1
240/243
.507/.441

241/181
75%
0.97/2.07
.443/.381

Edelbrock E-CNC Oval 24 Deg SF1020 Alum

308-325/133

2.25/1.88
4.31

112

144-143/125
87.1%

221-223/172
77.5%
55.8/62
165/184
.717/.665

283-276/199
71.2%
70.3/71.7
208/212
.677/.577

315-318/217
68.6%
79.6/78.2
236/232
.613/.503

332-335/232
69.6%
83.9/83.6
249/248
.539/.448

337/243
72.1%
84.8/87.5
251/259
.466/.403

337-344/252
74%
85.6/90.8
254/269
.412/.365

282/206
73%
-
.456/.381

Edelbrock E-CNC Oval 24 Deg Large Bore SF1020 Alum

308-325/133

2.25/1.88
4.6

112

149-145/125
85%

230-229/173
75.4%
57.7/62.3
171/185
.741/.669

299-289/200
68%
73.9/72
219/213
.712/.58

337-331/218
65.3%
84/78.5
249/233
.647/.506

358-351/234
66%
89.2/84.3
264/250
.573/.452

364-356/249
69.2%
90.5/89.7
268/266
.498/.413

361-364/257
70.9%
91.2/92.6
270/274
.439/.373

297/208
69.9%
-
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Edelbrock 77459 Victor Jr. 24 Deg SF1020 Alum

300/128

2.25/1.90

118

72-70/64
90.1%

140-139/122
87.5%

213-210/164
77.5%
53.2/57.8
158/171
.683/.627

273-267/199
73.7%
67.9/70.2
201/208
.654/.571

318-297/223
72.5%
77.3/78.7
229/233
.596/.512

342-307/240
74%
81.6/84.6
242/251
.524/.459

346-309/251
76.6%
82.4/88.5
244/262
.453/.411

331-317/257
79.3%
81.5/90.6
241/269
.392/.369

336-324/260
78.8%
83/91.7
246/272
.355/.331

279/215
76.8%
1.10/2.03
.456/.385

Edelbrock Victor 24 Deg 77409, 77429 SF1020 Alum

340/128

2.30/1.88

118

80-75/62
80%

159-153/123
78.8%

234-232/164
70.4%
56.1/59.1
166/175
.736/.634

295-295/197
66.8%
71/71
210/210
.699/.571

343-330/223
66.3%
81/80.3
240/238
.638/.517

369-343/241
67.7%
85.7/86.8
254/257
.562/.466

380-352/255
69.7%
88.1/91.9
261/272
.496/.422

378-364/262
70.6%
89.3/94.4
265/280
.44/.38

379-370/265
70.8%
90.1/95.5
267/283
.394/.341

311/216
69.5%
1.10/2.07
.466/.381

Edelbrock/ Musi Victor 24 Deg 61409 SF1020 Alum

367-377/ 128

2.30/1.90

114

149-148/122
82.2%

227-220/164
73.4%
53.8/57.8
159/171
.706/.627

301-290/196
66.3%
71.1/69.1
211/205
.70/.562

351-346/225
64.6%
83.9/79.4
249/235
.661/.516

375-385/248
65.3%
91.5/87.5
271/259
.60/.474

389-405/268
67.5%
95.6/94.5
283/280
.538/.439

402-409/284
70%
97.6/100
289/297
.48/.407

409-414/297
72.2%
99/105
293/310
.433/.379

326/226
69.1%
-
.466/.385

Edelbrock/ Musi Victor 24 Deg Out of Box NPS Alum

N/A

2.30/1.90
4.49
No Pipe

114

83-76/60
75.5%

158/114
72.2%

225-227/159
70.4%
54.4/56.1
161/166
.714/.608

271-287/192
68.8%
67.2/67.7
199/201
.661/.551

314-337/222
68.2%
78.3/78.3
232/232
.617/.509

347-357/249
70.7%
84.7/87.8
251/260
.556/.476

372-370/272
73.3%
89.3/95.9
265/284
.502/.446

386-382/285
74.2%
92.4/101
274/298
.455/.409

385-392/298
76.7%
93.5/105
277/311
.409/.38

311/224
72.1%
-
.466/.385

Edelbrock/ Musi Victor 24 Deg SF1060 Alum

N/A

2.30/1.90

114

78/62
79.5%

157/119
75.8%

237-236/161
68.1%
56.9/56.8
169/168
.747/.616

300/199
66.3%
72.2/70.2
214/208
.711/.571

353/238
67.4%
85/83.9
252/249
.669/.546

383-390/267
69.1%
93/94.2
276/279
.611/.511

403-413/284
69.6%
98.2/100
291/297
.552/.466

408-422/296
71.3%
99.9/104
296/309
.492/.425

413-419/305
73.3%
100/108
297/319
.438/.389

334/234
69.9%
-
.466/.385

Edelbrock/ Musi Victor 24 Deg Ported Dr Js Performance I-50 Alum

373/-

2.35/-

N/A

79-72/-

165-154/-

247-242/-
56.4
167
.756

305-310/-
70.9
210
.713

365-368/-
84.5
250
.68

408-425/-
96
285
.644

430-448/-
101
300
.582

448-462/-
105
311
.528

452-467/-
106
314
.474

457-475/-
107
318
.432

368
-
1.25
.476

Edelbrock Victor 24 Deg Ported RFD 370 Alum

370/-

2.35/-

N/A

74/-

160/-

251/-
57.9
171
.776

313/-
72.2
214
.726

370/-
85.3
253
.687

403/-
92.9
275
.623

432/-
99.6
295
.573

448/-
103
306
.52

455/-
105
311
.469

461/-
106
315
.428

366
-
1.25
.476

Edelbrock Victor 24 Deg Ported RFD 370 Alum

370/-

2.35/1.84
-
No Pipe

N/A

76/63
82.9%

160/122
76.3%

231/171
74%
53.3/64.3
158/191
.714/.675

304/214
70.4%
70.1/80.5
208/238
.705/.634

363/244
67.2%
83.7/91.8
248/272
.674/.578

396/275
69.4%
91.3/103
271/306
.612/.543

420/299
71.2%
96.8/112
287/333
.557/.506

440/317
72%
101/119
301/353
.51/.47

448/324
72.3%
103/122
306/361
.462/.427

459/326
71%
106/123
314/363
.426/.386

358/255
71.2%
1.24
.476/.373

Edelbrock Victor 24 Deg Ported RFD 383 Alum

383/-

2.40/1.84
-
No Pipe

N/A

75/63
84%

160/122
76.3%

253/171
67.6%
55.9/64.3
166/191
.766/.675

315/213
67.6%
69.6/80.1
206/237
.715/.631

372/244
65.6%
82.2/91.8
244/272
.676/.578

408/274
67.2%
90.2/103
267/305
.618/.541

432/300
69.4%
95.5/113
283/334
.561/.508

449/316
70.4%
99.3/119
294/352
.51/.468

459/324
70.6%
101/122
301/361
.463/.427

469/326
69.5%
104/123
307/363
.426/.386

369/254
69%
1.22
.486/.373

Edelbrock Victor 24 Deg Ported RFD 383 Updated 12-04-08 Alum

383/-

2.40/1.84
-
No Pipe

N/A

162/122
75.3%

235/171
72.8%
51.9/64.3
154/191
.712/.675

306/213
69.6%
67.6/80.1
200/237
.695/.631

368/244
66.3%
81.3/91.8
241/272
.669/.578

408/274
67.2%
90.2/103
267/305
.618/.541

446/300
67.3%
98.6/113
292/334
.579/.508

464/316
68.1%
103/119
304/352
.527/.468

472/324
68.6%
104/122
309/361
.476/.427

485/326
67.2%
107/123
318/363
.441/.386

372/254
68.4%
1.27
.486/.373

Edelbrock/ Chapman 77659 Rect. CNC Ported 77609 Alum

372/154

2.30/1.90
-
No Pipe

130

85/62
72.9%

156/135
86.5%

229/198
86.5%
55.1/69.8
163/207
.724/.757

287/242
84.3%
69.1/85.4
205/253
.68/.694

328/278
84.8%
78.9/98.1
234/291
.622/.638

362/300
82.9%
87.1/106
258/314
.572/.574

380/312
82.1%
91.5/110
271/326
.515/.511

290/244
84.1%
1.02/2.03
.466/.385

Edelbrock Victor 18 Deg 617569 Alum

405/95

2.50/1.96

63/60
95.2%

150/137
91.3%

223/190
85.2%
45.4/63
135/187
.648/.704

288/226
78.5%
58.7/74.9
174/222
.628/.628

353/254
72%
71.9/84.2
213/249
.616/.565

415/277
66.7%
84.5/91.8
250/272
.603/.514

468/302
64.5%
95.3/100
282/297
.583/.48

496/324
65.3%
101/107
299/318
.541/.451

491/328
66.8%
100/109
296/322
.476/.405

361/255
70.7%
1.22/3.45
.506/.397

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Edelbrock Big Victor 18 Deg CNC Alum

442- 451/189

2.45/1.85

294-284/230
79.6%
61.3/85.6
182/254
.643/.678

360-349/258
72.8%
75.2/96
223/284
.631/.608

414-411/281
68.1%
87.5/105
259/310
.612/.552

457-456/302
66.2%
96.8/112
287/333
.58/.508

482-487/319
65.8%
103/119
305/352
.539/.47

480-486/324
67.1%
102/121
304/357
.478/.424

413/286
69.1%
-
.496/.375

HRD Ported Dart 360 Alum

365/-

2.30/1.88

N/A

157/132
84.1%

235/177
75.3%
56.6/63.8
168/189
.743/.684

288/225
78.1%
69.3/81.1
205/240
.682/.652

341/270
79.2%
82.1/97.3
243/288
.646/.626

386/302
78.2%
92.9/109
275/322
.61/.584

412/321
77.9%
99.2/116
294/343
.558/.532

424/328
77.4%
102/118
302/350
.502/.475

430/333
77.4%
103/120
307/355
.453/.429

334/261
78.1%
1.18
.466/.381

HRD Ported Dart 360 16500000 Alum

N/A

165/132
80%

247/177
71.7%
-

302/225
74.5%
-

358/270
75.4%
-

405/302
74.6%
-

433/321
74.1%
-

445/328
73.7%
-

452/333
73.7%
-

351/261
74.4%

HRD Dart Big Chief 3815 Ported

455/-

2.45/1.86

N/A

167/139
83.2%

260/197
75.8%
55.2/72.5
163/215
.771/.77

331/246
74.3%
70.2/90.5
208/268
.736/.721

411/288
70.1%
87.2/106
258/314
.731/.675

475/339
71.4%
101/125
299/370
.704/.662

530/353
66.6%
112/130
333/385
.674/.591

550/366
66.5%
117/135
346/399
.612/.536

556/372
66.9%
118/137
349/406
.55/.484

410/288
70.1%
1.22
.496/.377

HRD Dart Big Chief 3815 Ported

444/-

N/A

394/265
67.3%
-

444/305
68.7%
-

475/353
74.3%
-

504/366
72.6%
-

514/372
72.4%
-

466/332
71.3%
1.16

Holley Alum

261/123

2.19/1.88

110

301/-
79.9
237
.428

-
-
1.15
.443/.381

Holley Avenger Alum CHP

314/-

2.25/1.88
4.25
Pipe

119

71/60
84.5%

137/122
89.1%

199/171
85.9%
50/61.6
148/183
.643/.661

251/207
82.5%
63.1/74.6
187/221
.608/.60

292/233
79.8%
73.4/83.9
218/249
.566/.54

315/252
80%
79.2/90.8
235/269
.509/.487

330/264
80%
83/95.1
246/282
.457/.437

340/269
79.1%
85.5/96.9
253/287
.412/.39

266/217
81.4%
1.08
.456/.381

Import / Speier Alum

338-342/-

2.30/1.88
4.60
No Pipe

N/A

157-160/120
75.7%

235-237/170
72%
56.8/61.2
168/181
.746/.657

295-296/208
70.4%
71.1/74.9
211/222
.70/.603

325-339/235
70.8%
79.9/84.7
237/251
.629/.545

350-354/252
71.6%
84.7/90.8
251/269
.556/.487

360-365/263
72.6%
87.2/94.7
259/281
.491/.436

370-373/271
72.9%
89.4/97.6
265/289
.44/.393

375-373/276
73.8%
90/99.4
267/295
.394/.356

382-373/280
74.2%
90.9/101
269/299
.358/.325

318/231
72.6%
-
.466/.381

Import / Speier CNC I-45 E-45 Alum

358/-

2.30/1.88
4.60
No Pipe

N/A

160-163/119
73.7%

244-245/168
68.7%
58.8/60.5
174/179
.773/.649

310-314/205
65.7%
75.1/73.8
223/219
.739/.594

345-363/238
67.2%
85.2/85.7
252/254
.671/.552

377-395/275
71.2%
92.9/99.1
275/294
.61/.532

394-417/294
72.5%
97.6/106
289/314
.549/.487

410-432/305
72.4%
101/110
300/326
.499/.442

422-434/313
73.1%
103/113
305/334
.451/.403

432-435/320
73.8%
104/115
309/342
.411/.371

350/249
71.1%
1.21
.466/.381

Naiser Racing Components - Slick Rick Racing Heads 5.3 BS Billet Pro Mod Alum

N/A

2.70/1.95
-
No Pipe

N/A

238/162
68.1%
41.6/54.2
123/161
.641/.604

333/205
61.6%
58.2/68.6
172/203
.672/.573

426/250
58.7%
74.4/83.7
220/248
.688/.559

502/290
57.8%
87.7/97.1
260/288
.676/.54

561/325
57.9%
98/109
290/322
.647/.519

598/350
58.5%
104/117
309/347
.604/.489

627/367
58.5%
110/123
324/364
.563/.456

640/378
59.1%
112/127
331/375
.517/.423

651/380
58.4%
114/127
337/377
.478/.386

660/-
115
342
.444

665/-
116
344
.413

536/301
-
-
.547/.395

Naiser Racing Components - Slick Rick Racing Heads SR1 5.3 BS Billet Pro Mod Alum

N/A

2.65/2.00
-
No Pipe

N/A

255/185
72.5%
46.2/58.9
137/174
.699/.672

345/235
68.1%
62.6/74.8
185/222
.71/.64

432/279
64.6%
78.3/88.8
232/263
.711/.608

502/317
63.1%
91/101
270/299
.688/.576

552/348
63%
100/111
297/328
.649/.542

597/371
62.1%
108/118
321/350
.614/.506

620/386
62.3%
112/123
333/364
.567/.468

630/392
62.2%
114/125
338/370
.518/.427

645/392
60.8%
117/125
347/370
.482/.388

654/393
60.1%
119/125
351/371
.448/.357

660/-
120
355
.418

536/330
-
-
.537/.405

Patriot 320 Alum

320/125

2.25/1.88

119

86/64
74.4%

177/148
83.6%

252/195
77.4%
63.4/70.2
188/208
.814/.754

295/231
78.3%
74.2/83.2
220/247
.715/.67

326/256
78.5%
82/92.2
243/273
.632/.594

359/269
74.9%
90.3/96.9
268/287
.58/.52

369/275
74.5%
92.8/99.1
275/294
.511/.456

296/229
77.3%
1.15/2.20
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Patriot 320 Weingartner Racing Alum

N/A

2.25/1.88
4.31
No Pipe

N/A

63-57/60
100%

140-127/103
77.2%

195-190/154
80%
48.4/55.5
143/164
.622/.595

252-250/189
75.3%
63.1/68.1
187/202
.608/.548

305-309/242
78.8%
77.2/87.2
229/258
.595/.561

343-326/256
76.5%
84.1/92.2
249/273
.54/.495

369-326/266
76.5%
87.4/95.8
259/284
.481/.441

363-343/266
75.4%
88.8/95.8
263/284
.428/.386

350-341/267
77.3%
86.9/96.2
257/285
.372/.344

350-336/268
78.1%
86.3/96.5
256/286
.332/.311

290/223
77.1%
-
.456/.381

Patriot Freedom 360 Meaux Racing Cyl 3 SF600 Alum

N/A

2.35/1.88
4.50
No Pipe

N/A

160/139
86.9%

237/183
77.2%
54.6/65.9
162/195
.733/.707

290/226
77.9%
66.9/81.4
198/241
.673/.655

337/256
76%
77.7/92.2
230/273
.625/.594

358/265
74%
82.5/95.5
245/283
.554/.512

371/271
73%
85.5/97.6
253/289
.492/.449

381/274
71.9%
87.8/98.7
260/292
.442/.397

389/274
70.4%
89.7/98.7
266/292
.401/.353

395/274
69.4%
91.1/98.7
270/292
.366/.318

324/240
74.1%
-
.476/.381

Pro Comp 320 Alum

320/-

2.25/1.88
4.50

118

160/97
60.6%

226/152
67.3%
56.8/54.8
168/162
.73/.588

274/181
66.1%
68.9/65.2
204/193
.664/.525

302/216
71.5%
76/77.8
225/231
.585/.501

318/249
78.3%
80/89.7
237/266
.514/.481

333/268
80.5%
83.8/96.5
248/286
.461/.444

348/283
81.3%
87.5/102
259/302
.422/.41

280/207
73.7%
1.09
.456/.381

Pro Comp 320 CNC RaceParts Alum

N/A

2.25/1.88

115

74/62
83.8%

166/118
71.1%

245/160
65.3%
61.6/57.6
183/171
.791/.618

308/195
63.3%
77.5/70.2
230/208
.746/.565

340/229
67.4%
85.5/82.5
253/244
.659/.531

360/248
68.9%
90.5/89.3
268/265
.581/.479

375/265
70.7%
94.3/95.5
279/283
.519/.439

299/203
67.7%
-
.456/.381

Pro Comp 320 Out of Box Meaux Racing SF600 Alum

N/A

2.30/1.88
4.50
No Pipe

N/A

143-145/137
95.1%

221-220/183
83%
53.1/65.9
157/195
.697/.707

277-273/210
76.4%
66.2/75.7
196/224
.652/.609

313-312/230
73.6%
75.2/82.9
223/245
.592/.533

333-331/251
75.6%
79.9/90.4
237/268
.525/.485

342/263
76.9%
82.3/94.7
244/281
.463/.436

351-346/274
78.6%
83.9/98.7
249/292
.413/.397

355-354/282
79.5%
85.3/102
253/301
.373/.363

364-360/286
79%
87.1/103
258/305
.343/.332

299/235
78.6%
-
.466/.381

Pro Comp 320 VJ Bowl / Chamber Work Meaux Racing SF600 Alum

N/A

2.30/1.88
4.50
No Pipe

N/A

152-154/125
81.7%

242/178
73.6%
58.2/64.1
173/190
.765/.688

299-305/215
71.2%
72.7/77.5
215/229
.716/.623

334-345/261
76.9%
81.7/94
242/279
.644/.605

354-359/287
80.5%
85.8/103
254/306
.563/.555

365-369/301
82%
88.3/108
262/321
.497/.499

370-374/309
83.1%
89.5/111
265/330
.441/.448

375/312
83.2%
90.3/112
267/333
.395/.402

313/249
79.3%
-
.466/.381

Pro Comp 360 CNC Alum

360/-

2.25/1.88

115

73/60
82.2%

141/121
85.8%

212/166
78.3%
53.3/59.8
158/177
.685/.642

280/205
73.2%
70.4/73.8
209/219
.678/.594

331/240
72.5%
83.2/86.5
247/256
.641/.557

365/265
72.6%
91.8/95.5
272/283
.589/.512

389/289
74.3%
97.8/104
290/308
.538/.479

404/307
76%
102/111
301/328
.489/.445

407/321
78.9%
102/116
303/343
.438/.414

316/239
75.7%
1.13
.456/.381

Pro Comp VJ SSR Polished them out Chad Speier SF600 Alum

N/A

2.30/-
4.31

N/A

160/-

217-210/-
51.4
152
.675

260-255/-
62
184
.61

302-292/-
71.5
212
.563

335-320/-
78.8
234
.517

362-345/-
85.1
252
.479

367-352/-
86.5
256
.426

369-358/-
87.5
259
.383

292
-
-
.466

Pro-FilerP/N 174-29 24 Deg Alum

290/-

2.30/1.88

119

148/129
87.2%

213/162
76.1%
51.3/58.4
152/173
.673/.626

276/198
71.7%
66.4/71.3
197/211
.654/.574

327/250
76.5%
78.7/90.1
233/267
.517/.483

338/261
77.2%
81.4/94
241/279
.458/.432

350/264
75.4%
84.2/95.1
250/282
.415/.383

275/211
76.5%
1.21
.466/.381

Pro-Filer 290 Out of Box CNC Chambers Weingartner Racing Alum

290/-

2.25/1.88
4.13
No Pipe

N/A

76/61
80.3%

146-143/114
78.9%

210-208/158
75.6%
52.6/56.9
156/169
.675/.611

261/188
72%
65.6/67.7
194/201
.632/.545

311-308/224
72.4%
77.8/80.7
231/239
.60/.52

344-329/249
74%
84.6/89.7
251/266
.543/.481

353-314/259
77.7%
83.9/93.3
249/276
.462/.429

344-325/268
80.1%
84.1/96.5
249/286
.405/.388

344-330/273
81%
84.8/98.3
251/291
.363/.352

337-331/276
82.6%
84/99.4
249/295
.324/.32

289/223
77.3%
1.16
.456/.381

Pro-Filer 290 24 Deg Darin Morgan Alum

290/-

2.30/1.88

119

155/-

235/-
56.6
168
.743

296/-
71.2
211
.701

350/-
84.2
250
.664

379/-
91.2
270
.599

382/-
91.9
272
.517

385/-
92.7
275
.456

387/-
93.1
276
.408

390/-
93.9
278
.37

329
-
1.34
.466/.381

Pro-Filer 290 Oval VJ Bowl Blend Dr Js Performance Alum

N/A

2.25/1.88
4.31
2" Pipe

118

82/69
84.1%

163/117
71.8%

236/160
67.8%
59.4/57.6
176/171
.762/.618

295/193
65.4%
74.2/69.5
220/206
.715/.56

335/224
66.9%
84.3/80.7
250/239
.649/.52

355/251
70.7%
89.3/90.4
265/268
.573/.485

358/268
74.9%
90/96.5
267/286
.496/.444

290/202
69.6%
-
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Pro-Filer 290 Oval Dr Js Performance CCMAlum

290/78

2.30/1.88
4.30

118

84/69
82.1%

165/117
70.9%

236/160
67.8%
56.8/57.6
168/171
.746/.618

295/193
65.4%
71/69.5
210/206
.699/.56

335/224
66.9%
80.6/80.7
239/239
.635/.52

356/251
70.5%
85.7/90.4
254/268
.562/.485

368/268
72.8%
88.6/96.5
262/286
.498/.444

293/202
69.1%
1.27/3.44
.466/.381

Pro-Filer 290 Ported Foxwell Motorsports I-45 Alum

N/A

2.35/1.85

N/A

162-161/122
75.5%

240-230/165
70.2%
54.2/61.4
161/182
.727/.648

289-286/220
76.5%
66.3/81.8
196/243
.667/.648

339-333/265
78.9%
77.5/98.6
230/292
.623/.625

367-349/286
79.9%
82.5/106
245/315
.554/.562

389-371/299
78.7%
87.6/111
260/330
.504/.503

401-393/310
78.1%
91.5/115
271/342
.46/.457

412-404/-
94.1
279
.421

320/238
-
-
.476/.375

Pro-Filer 290 Oval Ported Chad Speier Alum

N/A

2.25/1.88
4.155
No Pipe

119

168-170/120
71%

231-233/157
67.7%
58.3/56.6
173/168
.749/.607

285-290/193
67.1%
72.3/69.5
214/206
.696/.56

333-337/220
65.7%
84.3/79.3
250/235
.649/.51

352/247
70.2%
88.5/89
262/264
.568/.477

361-357/259
72.1%
90.3/93.3
268/276
.497/.429

363-359/264
73.1%
90.8/95.1
269/282
.437/.383

361-362/269
74.4%
90.9/96.9
269/287
.389/.347

358-364/271
75.1%
90.8/97.6
269/289
.35/.314

313/222
71%
-
.456/.381

Pro-FilerP/N 174-32 24 Deg Alum

320/-

2.30/1.88

119

164/129
78.7%

228/162
71.1%
54.9/58.4
163/173
.72/.626

288/198
68.8%
69.3/71.3
205/211
.682/.574

337/236
70%
81.1/85
240/252
.639/.547

379/250
66%
91.2/90.1
270/267
.599/.483

395/261
66.1%
95.1/94
282/279
.535/.432

392/264
67.3%
94.3/95.1
280/282
.464/.383

390/268
68.7%
93.9/96.5
278/286
.411/.345

322/221
68.7%
1.23
.466/.381

Pro-FilerP/N 174-35 24 Deg Alum

350/-

2.30/1.88

119

165/129
78.2%

230/162
70.4%
55.4/58.4
164/173
.727/.626

290/198
68.3%
69.8/71.3
207/211
.687/.574

340/235
69.1%
81.8/84.7
242/251
.645/.545

380/250
65.8%
91.5/90.1
271/267
.60/.483

400/261
65.3%
96.3/94
285/279
.542/.432

412/264
64.1%
99.2/95.1
294/282
.488/.383

317/214
67.6%
1.18
.466/.381

Pro-FilerP/N 184 12 Deg Alum

470/-

2.40/1.90

160/137
85.6%

239/182
76.2%
52.8/64.2
157/190
.724/.696

314/226
72%
69.4/79.7
206/236
.713/.648

384/275
71.6%
84.9/97
252/287
.698/.631

431/298
69.1%
95.3/105
282/311
.653/.57

458/306
66.8%
101/108
300/320
.594/.502

483/310
64.2%
107/109
316/324
.548/.445

497/320
64.4%
110/113
326/334
.502/.408

371/257
69.3%
1.06
.486/.385

Pro-Filer 12 Deg CNC MBE Alum

475/187

2.40/1.90

55.5

507/319
62.9%
112/113
332/333
.512/.407

-
-
1.07/1.71
.486/.385

Pro-Filer NEW 2010 SniperX Conventional Port CNC Darin Morgan SF600 Alum

375/-

2.35/1.85
-
No Pipe

N/A

156/128
82.1%

234/171
73.1%
53.9/63.6
160/188
.724/.672

306/205
67%
70.5/76.3
209/226
.71/.604

360-368/237
65.1%
83.9/88.2
249/261
.675/.559

407-414/298
72.6%
94.6/111
280/328
.635/.585

427-451/314
71.5%
101/117
300/346
.582/.529

444-468/321
70.4%
105/119
312/354
.529/.473

459-477/327
69.9%
108/122
320/360
.482/.428

472-481/332
69.7%
110/124
326/366
.442/.391

368/259
70.5%
1.27
.476/.375

Pro-Filer SniperX Conventional Port Darin Morgan SF600 Alum

375/-

2.35/1.85
-
No Pipe

N/A

159/120
75.5%

236-235/160
67.9%
54.3/59.5
161/176
.728/.629

307-301/197
64.8%
70.1/73.3
208/217
.705/.58

360-363/238
65.8%
83.3/88.5
247/262
.671/.561

396-410/289
71.7%
92.9/108
275/319
.623/.568

422-444/308
71.1%
99.8/115
296/340
.574/.519

437-460/319
71.1%
103/119
306/352
.52/.47

444-466/327
71.9%
105/122
311/360
.469/.428

454-474/332
71.6%
107/124
317/366
.43/.391

363/254
70.2%
1.24
.476/.375

Pro-Filer Spread Port Darin Morgan SF600 Alum

N/A

2.40/1.88
-
No Pipe

N/A

161/88
54.7%

250/130
52%
55.3/46.8
164/139
.757/.503

327/167
51.1%
72.3/60.2
214/178
.743/.484

401/181
45.1%
88.6/65.2
263/193
.729/.42

449/192
42.8%
99.3/69.2
294/205
.68/.371

482/203
42.1%
107/73.1
316/217
.626/.336

496/208
41.9%
110/74.9
325/222
.563/.302

503/212
42.1%
111/76.4
329/226
.508/.273

513/217
42.3%
113/78.2
336/232
.466/.252

398/178
44.6%
-
.486/.381

Pro Topline 260 Oval Gamrace

260/-

2.19/1.88
4.30
No Pipe

N/A

175/128
73.1%
46.5/46.1
138/137
.581/.495

218/140
64.2%
57.9/50.4
171/149
.543/.406

236/149
63.1%
62.7/53.7
186/159
.47/.346

251/153
61%
66.6/55.1
197/163
.416/.296

255/154
60.4%
67.7/55.5
201/164
.363/.255

227/145
63.8%
0.98
.443/.381

Pro Topline 260 Oval Ported Gamrace Stage 1

260/-

2.19/1.88
4.30
No Pipe

N/A

205/142
69.3%
54.4/51.2
161/152
.68/.549

265/169
63.8%
70.4/60.9
208/180
.66/.49

302/192
63.6%
80.2/69.2
238/205
.601/.445

302/209
69.2%
80.2/75.3
238/223
.501/.404

297/225
75.8%
78.8/81.1
234/240
.422/.373

274/187
68.3%
1.16
.443/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Pro Topline 300 Ported ET Performance Alum

300/-

2.30/1.80
4.60

120

78-77/63
81.3%

153-150/133
87.8%

226-221/167
74.7%
53.8/65.6
159/194
.706/.674

287-287/199
69.3%
69.1/78.2
205/232
.68/.603

332-333/223
67.1%
80/87.6
237/260
.63/.54

364-383/239
64%
89.9/93.9
266/278
.59/.482

379-400/250
64.2%
93.7/98.2
278/291
.527/.433

387-390/-
93.5
277
.46

307/202
-
1.30
.466/.365

Pro Topline 320 Alum

320/135

2.25/1.88

119

74/62
83.8%

166/118
71.1%

245/160
65.3%
61.6/57.6
183/171
.791/.618

308/195
63.3%
77.5/70.2
230/208
.746/.565

339/229
67.6%
85.3/82.5
253/244
.657/.531

360/248
68.9%
90.5/89.3
268/265
.581/.479

374/265
70.9%
94.1/95.5
279/283
.518/.439

299/203
67.8%
1.17/1.96
.456/.381

Pro Topline 320 Out of Box Alum

320/135

2.25/1.88
4.50

119

83/66
79.5%

152/138
90.8%

218/173
79.4%
54.8/62.3
162/185
.704/.669

278/200
71.9%
69.9/72
207/213
.673/.58

333/232
69.7%
83.8/83.6
248/248
.645/.538

364/256
70.3%
91.5/92.2
271/273
.588/.495

375/273
72.8%
94.3/98.3
279/291
.519/.452

287/212
74%
1.17/2.02
.456/.381

Pro Topline 325 Ported ET Performance Alum

325/-

2.30/1.80
4.50

125

73-72/62
85.5%

155-156/120
77.2%

237-238/156
65.7%
57.2/61.3
169/182
.75/.63

296-301/211
70.7%
71.8/82.9
213/246
.707/.639

338-351/242
70.2%
82.9/95.1
246/282
.653/.586

367-385/258
68.6%
90.5/101
268/300
.594/.521

386-399/269
68.5%
94.5/106
280/313
.532/.465

399-405/277
68.9%
96.8/109
287/323
.476/.419

315/219
69.5%
1.24
.466/.365

Pro Topline 355 Ported ET Performance Alum

355/-

2.30/1.80
4.625

120

76-78/64
83.1%

160-160/122
76.3%

243-240/167
69.2%
58.1/65.6
172/194
.763/.674

305-307/205
67%
73.7/80.6
218/239
.725/.621

354-367/239
66.3%
86.8/93.9
257/278
.683/.579

379-400/264
67.8%
93.7/104
278/307
.615/.533

398-417/284
69.7%
98.1/112
291/331
.552/.491

412-419/297
71.5%
100/117
296/346
.492/.45

326/225
69.2%
1.17
.466/.365

Pro Topline 360 Alum

360/135

2.30/1.88

119

75/62
82.7%

158/118
74.7%

230/160
69.6%
55.4/57.6
164/171
.727/.618

286/195
68.2%
68.8/70.2
204/208
.678/.565

342/229
67%
82.3/82.5
244/244
.648/.531

380/248
65.3%
91.5/89.3
271/265
.60/.479

403/265
65.8%
97/95.5
287/283
.546/.439

300/203
67.5%
1.12/1.96
.466/.381

Pro Topline 400 Ported ET Performance Alum

400/-

2.35/1.80
4.50

125

78-78/67
85.9%

154-155/123
79.6%

238-238/160
67.2%
54.9/62.9
163/186
.736/.646

305-304/198
65%
70.2/77.8
208/231
.706/.60

352-358/228
64.2%
81.8/89.6
243/265
.659/.552

382-401/266
67.9%
90.3/105
267/310
.605/.537

406-426/292
70.2%
95.9/115
284/340
.551/.505

422-433/303
70.9%
98.6/119
292/353
.496/.459

327/224
68.6%
1.07
.476/.365

Reher Morrison Dart 360 Alum

375/-

2.30/1.88

N/A

415/-
99.9
296
.492

-
-
1.11
.466/.381

Reher Morrison Dart 360 Alum

N/A

2.30/1.88
4.60

118

350/-
84.2
250
.664

420/290
69%
101/104
300/310
.498/.42

385
-
-
.466/.381

Reher Morrison Dart 360 Alum

N/A

2.325/1.88
4.60

118

360/-
84.8
251
.675

430/300
69.8%
101/108
300/320
.504/.435

395
-
-
.471/.381

Reher Morrison Dart 360 Alum

370/-

2.325/1.88
4.60

N/A

435/-
102
304
.51

-
-
1.18
.471/.381

Reher Morrison Oval 14 Deg

N/A

2.45/1.85

N/A

400/-
84.8
251
.712

500/-
106
314
.556

450
-
-
.496/.375

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Reher Morrison 14 Deg

467/-

2.45/1.85

N/A

520/-
110
327
.578

-
-
1.11
.496/.375

Reher Morrison 14 Deg

476/-

2.45/1.85

N/A

510/-
108
321
.567

520/-
110
327
.463

515
-
1.09
.496/.375

Reher Morrison 18 Deg

476/-

2.40/1.90

N/A

490/-
108
321
.556

505/-
112
331
.51

520/-
115
341
.472

505
-
1.09
.486/.385

Reher Morrison Brodix BB-2Plus 26 Deg Alum

320/-

2.25/1.88

119

161/132
82%

244/169
69.3%
61.4/60.9
182/180
.788/.653

285/204
71.6%
71.7/73.5
212/218
.69/.591

328/234
71.3%
82.5/84.3
244/250
.636/.543

359/261
72.7%
90.3/94
268/279
.58/.504

369/274
74.3%
92.8/98.7
275/292
.511/.454

373/284
76.1%
93.8/102
278/303
.452/.412

303/223
73.5%
1.17
.456/.381

Reher Morrison Brodix BB-2 26 Deg Alum

N/A

2.30/1.88

N/A

154/157
101%

222/201
90.5%
53.4/72.4
158/215
.701/.777

286/233
81.5%
68.8/83.9
204/249
.678/.676

324/258
79.6%
78/92.9
231/275
.614/.598

360/275
76.4%
86.6/99.1
257/294
.569/.532

380/286
75.3%
91.5/103
271/305
.515/.474

385/292
75.8%
92.7/105
275/312
.456/.423

302/243
80.6%
-
.466/.381

Reher Morrison Brodix BB-2Xtra 26 Deg Alum

355/-

2.30/1.88

119

183/134
73.2%

235/177
75.3%
56.6/63.8
168/189
.743/.684

294/216
73.5%
70.8/77.8
210/231
.697/.626

340/247
72.6%
81.8/89
242/264
.645/.573

376/268
71.3%
90.5/96.5
268/286
.594/.518

395/279
70.6%
95.1/101
282/298
.535/.462

408/288
70.6%
98.2/104
291/307
.483/.417

319/230
72.1%
1.15
.466/.381

Reher Morrison Raptor 12 Deg Alum

465/-

2.45/1.85

423/-
89.7
266
.753

525/-
111
330
.584

535/-
113
336
.529

540/-
115
339
.481

506
-
1.16
.496/.375

Reher Morrison Raptor - Darin Morgan SF600 Alum

N/A

2.45/1.85
-
No Pipe

N/A

153/135
88.2%

258/190
73.6%
54.7/70.7
162/209
.765/.746

346/240
69.4%
73.4/89.3
217/265
.77/.707

422/289
68.5%
89.5/108
265/319
.751/.681

485/315
64.9%
103/117
305/347
.719/.619

514/330
64.2%
109/123
323/364
.653/.556

526/336
63.9%
112/125
331/370
.585/.495

540/339
62.8%
115/126
339/374
.534/.444

550/340
61.8%
117/126
346/375
.489/.401

422/279
66.3%
-
.496/.375

Reher Morrison Raptor II - Darin Morgan SF600 I-50 E-50 Alum

480/-

2.45/1.85
4.625
No Pipe

155-161/134
84.8%

245-243/182
74.6%
51.8/67.7
153/201
.724/.715

345-350/223
64.2%
73.7/83
218/246
.773/.657

425-427/257
60.3%
90.4/95.6
268/283
.758/.606

489-487/286
58.6%
104/106
307/315
.724/.562

519-515/316
61.1%
110/118
325/348
.657/.532

538-527/340
63.8%
113/126
335/375
.592/.501

544/354
65.1%
115/132
342/390
.538/.464

547-552/358
65.2%
117/133
345/395
.489/.422

423/272
64.4%
1.14
.496/.375

Reher Morrison 5.3 BS Pro Mod Darin Morgan SF600 Alum

N/A

2.68/2.05
-
No Pipe

N/A

171/125
73.1%

275/182
66.2%
48.7/55.1
144/163
.746/.645

374/228
61%
66.3/69.1
196/205
.761/.606

456/274
60.1%
80.8/83
240/246
.742/.583

521/319
61.2%
92.4/96.6
274/286
.706/.565

568/352
62%
101/107
298/316
.66/.535

609/374
61.4%
108/113
320/336
.619/.497

639/393
61.5%
113/119
336/353
.578/.464

659/403
61.2%
117/122
346/362
.536/.429

678/413
60.9%
120/125
356/371
.501/.399

687/417
60.7%
122/126
361/374
.466/.37

698/419
60%
124/127
367/376
.437/.343

528/325
61.5%
-
.543/.415

RHS Pro Action Iron

320/-

2.25/1.88

119

75/62
82.7%

166/118
71.1%

246/160
65%
61.9/57.6
183/171
.795/.618

309/195
63.1%
77.7/70.2
230/208
.749/.565

340/229
67.4%
85.5/82.5
253/244
.659/.531

360/248
68.9%
90.5/89.3
268/265
.581/.479

375/265
70.7%
94.3/95.5
279/283
.519/.439

299/203
67.7%
1.17
.456/.381

RHS Out of Box Weingartner Racing Iron

N/A

2.25/1.88
4.50
No Pipe

N/A

86/70
81.4%

183/139
76%

252/176
69.8%
63.4/63.4
188/188
.814/.68

303/205
67.7%
76.2/73.8
226/219
.734/.594

334/231
69.2%
84/83.2
249/247
.647/.536

341/243
71.3%
85.8/87.5
254/259
.551/.47

346/258
74.6%
87/92.9
258/275
.479/.427

346/264
76.3%
87/95.1
258/282
.419/.383

301/217
72%
-
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

RHS 320 Out of Box Weingartner Racing Brez Iron

N/A

2.25/1.88
4.31
No Pipe

N/A

86/66
76.7%

167/133
79.6%

237/173
73%
59.6/62.3
177/185
.765/.669

288/206
71.5%
72.4/74.2
215/220
.698/.597

328/227
69.2%
82.5/81.8
244/242
.636/.526

350/246
70.3%
88/88.6
261/263
.565/.475

359/255
71%
90.3/91.9
268/272
.497/.422

355/261
73.5%
89.3/94
265/279
.43/.378

298/214
72%
-
.456/.381

RHS 320 Ported Bowl Weingartner Racing Brez Iron

N/A

2.25/1.88
4.31
No Pipe

N/A

163/136
83.4%

240/180
75%
60.4/64.8
179/192
.775/.696

281/212
75.4%
70.7/76.4
209/226
.681/.615

327/242
74%
82.2/87.2
244/258
.634/.561

361/261
72.3%
90.8/94
269/279
.583/.504

365/267
73.2%
91.8/96.2
272/285
.505/.442

373/271
72.7%
93.8/97.6
278/289
.452/.393

301/224
74.4%
-
.456/.381

RHS 320 VJ Bowl Blend Foxwell Motorsports Iron

N/A

2.25/1.88

N/A

149/105
70.5%

218/144
66.1%
54.8/51.9
162/154
.704/.557

280-278/183
65.6%
70.2/65.9
208/195
.676/.531

327-328/215
65.6%
82.4/77.5
244/229
.635/.499

350-357/237
67%
88.9/85.4
263/253
.571/.458

362-357/253
70.4%
90.4/91.1
268/270
.498/.419

367-357/266
73.5%
91/95.8
270/284
.438/.386

293/200
68.5%
-
.456/.381

RHS 360 Weingartner Racing I-BC Iron

N/A

2.30/1.88
4.625
No Pipe

N/A

70-68/56
81.2%

145-138/112
79.2%

215-207/154
73%
50.8/55.5
150/164
.667/.595

285-277/190
67.6%
67.6/68.4
200/203
.666/.551

339-333/218
64.9%
80.9/78.5
240/233
.637/.506

375-351/235
64.7%
87.4/84.7
259/251
.573/.454

378-356/249
67.8%
88.3/89.7
262/266
.497/.413

381-363/261
70.2%
89.5/94
265/279
.441/.378

383-371/268
71.1%
90.7/96.5
269/286
.397/.345

387-375/273
71.7%
91.7/98.3
272/291
.361/.317

314/218
69.3%
-
.466/.381

RHS Pro Action Westech Alum

320/-

2.25/1.88

N/A

72-72/60
83.3%

131-129/114
87.7%

191-186/156
82.8%
47.4/56.2
140/167
.609/.603

248-238/193
79.4%
61.1/69.5
181/206
.589/.56

296-286/224
77%
73.2/80.7
217/239
.564/.52

320-330/252
77.5%
81.7/90.8
242/269
.525/.487

328-356/276
80.7%
86/99.4
255/295
.473/.457

253/203
80%
1.07
.456/.381

RHS Pro Action

360/-

2.30/1.88

119

75/62
82.7%

158/118
74.7%

230/160
69.6%
55.4/57.6
164/171
.727/.618

286/195
68.2%
68.8/70.2
204/208
.678/.565

342/229
67%
82.3/82.5
244/244
.648/.531

380/248
65.3%
91.5/89.3
271/265
.60/.479

403/265
65.8%
97/95.5
287/283
.546/.439

300/203
67.5%
1.12
.466/.381

RHS ProTopLine Ported Meaux Racing Iron

N/A

2.30/1.88
4.50
No Pipe

N/A

154/124
80.5%

236/171
72.5%
56.8/61.6
168/183
.746/.661

290/207
71.4%
69.8/74.6
207/221
.687/.60

319/229
71.8%
76.8/82.5
227/244
.605/.531

340/245
72.1%
81.8/88.3
242/262
.537/.474

350/256
73.1%
84.2/92.2
250/273
.474/.424

356/264
74.2%
85.7/95.1
254/282
.422/.383

359/268
74.7%
86.4/96.5
256/286
.378/.345

362/271
74.9%
87.1/97.6
258/289
.343/.314

307/226
73.6%
-
.466/.381

RHS ProTopLine Ported Meaux Racing Iron

N/A

2.30/1.88
4.50
No Pipe

N/A

147/139
94.6%

232/179
77.2%
55.8/64.5
165/191
.733/.692

294/224
76.2%
70.8/80.7
210/239
.697/.649

328/271
82.6%
78.9/97.6
234/289
.622/.629

354/297
83.9%
85.2/107
252/317
.559/.574

376/309
82.2%
90.5/111
268/330
.509/.512

390/318
81.5%
93.9/115
278/339
.462/.461

397/320
80.6%
95.6/115
283/342
.418/.412

405/322
79.5%
97.5/116
289/344
.384/.373

325/264
81.4%
-
.466/.381

RHS Chad Speier V3.93 I-50 E-50 Iron / Alum

N/A

2.35/1.88
4.60
No Pipe

120

155-151/118
77.1%

232-230/162
70.1%
53.3/58.4
158/173
.714/.626

310-303/194
63.3%
70.7/69.9
209/207
.711/.562

367-354/227
63%
83.1/81.8
246/242
.669/.526

406-383/256
64.9%
91/92.2
269/273
.61/.495

424-410/278
66.7%
96.1/100
285/297
.553/.461

437-429/294
67.9%
99.8/106
296/314
.502/.426

440/308
70%
101/111
301/329
.454/.397

444-443/316
71.3%
102/114
303/337
.411/.366

448-445/318
71.2%
103/115
305/339
.377/.335

363/247
68.2%
-
.476/.381

RHS Chad Speier V4.20 I-50 E-45 Iron

395/-

2.35/1.88
4.50
No Pipe

118

157-160/125
78.9%

240-244/161
66.5%
55.8/58
165/172
.748/.622

307-308/200
65%
70.9/72
210/213
.713/.58

361-366/230
63.3%
83.8/82.9
248/245
.674/.533

412-402/255
62.7%
93.8/91.9
278/272
.629/.493

437-430/280
64.6%
99.9/101
296/299
.575/.464

442-433/296
67.7%
101/107
299/316
.507/.429

447-442/310
69.7%
102/112
304/331
.458/.399

457-446/316
70%
104/114
308/337
.419/.366

361/241
67%
1.14
.476/.381

RHS Chad Speier I-50 E-50 Iron

N/A

2.35/1.88
4.60
2.25 Pipe

N/A

155-158/132
84.3%

234-237/184
78.1%
54.3/66.3
161/196
.728/.711

301/223
74.1%
69.4/80.3
206/238
.698/.647

353-351/262
74.4%
81.2/94.4
240/280
.653/.608

402-388/262
66.3%
91.1/94.4
270/280
.611/.506

432-417/291
68.6%
97.9/105
290/311
.563/.482

441-430/310
71.2%
100/112
298/331
.505/.449

446-439/323
73%
102/116
302/345
.456/.416

454-451/329
72.7%
104/119
309/351
.42/.382

459-455/333
72.9%
105/120
312/355
.385/.351

365/265
72.5%
-
.476/.381

Sonny's Brodix BB-5 Sportsman Alum

395/123

119

418/275
65.8%
-

-
-
1.06/2.24

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Sonny's Brodix BB-5 MaxFlow Alum

406/149

113.5.

-/311

439/-
-

-
-
1.08

Sonny's Brodix BB-5 MaxFlow Marine Alum

406/149

2.35/1.90

113.5.

383-405/295
74.9%
90.8/104
269/308
.522/.484

401-418/303
74%
94.4/107
280/317
.475/.435

402/299
74.4%
1.01/2.03
.476/.385

Sonny's Brodix BB-5 400 MaxFlow Alum

400/149

2.35/1.90

113.5.

-/311

445/-
103
304
.459

-
-
1.11
.476/.385

Sonny's Dart 360 Ported Alum

N/A

413/297
71.9%
-

Sonny's Dart 18 Deg Ported SF600 Alum

N/A

2.35/1.86

N/A

437/339
77.6%
101/125
299/370
.507/.497

-
-
-
.476/.377

Sonny's / Brodix PB 2005 14.5 Deg Alum

490/-

2.52/1.86

129/111
86%

199/156
78.4%
39.9/57.4
118/170
.574/.61

287/196
68.3%
57.5/72.1
170/214
.621/.574

334/231
69.2%
67/85
198/252
.578/.542

431/258
59.9%
86.4/95
256/281
.621/.504

482/274
56.8%
96.6/101
286/299
.596/.459

517/287
55.5%
104/106
307/313
.559/.421

540/293
54.3%
108/108
321/320
.519/.382

365/226
61.9%
1.10
.510/.377

Sonny's / Brodix PB 2005 14.5 Deg Lt Ported Alum

493/175

2.52/1.86

153/132
86.3%

241/187
77.6%
48.3/68.8
143/204
.695/.731

323/227
70.3%
64.8/83.5
192/248
.699/.665

395/258
65.3%
79.2/95
235/281
.683/.605

452/289
63.9%
90.6/106
269/315
.652/.565

499/326
65.3%
100/120
296/355
.617/.546

517/338
65.4%
104/124
307/369
.559/.495

540/343
63.5%
108/126
321/374
.519/.447

390/263
67.3%
1.10/1.96
.510/.377

Sonny's Brodix 14.5 Deg SF600 Alum

548/204

2.52/1.86
4.625

73-77

555/378
68.1%
111/139
330/412
.534/.492

-
-
1.01/1.85
.510/.377

Sonny's Brodix 14.5 Deg Pontiac CNC SF600 Alum

548/204

2.48/1.92
4.60

548/378
69%
113/131
336/387
.535/.477

-
-
1.00/1.85
.502/.389

Sonny's Brodix 14.5 Deg Pontiac Marine Alum

494/184

2.48/1.90
4.60

N/A

514/-
106
315
.646

538/-
111
330
.591

526
-
1.09
.502/.385

Sonny's Hemi Alum

N/A

2.55/1.96

65-95

570/390
68.4%
112/129
331/383
.541/.482

-
-
-
.516/.397

Sonny's Hemi Alum

N/A

2.55/2.00

65-95

570/400
70.2%
112/127
331/377
.541/.484

-
-
-
.516/.405

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Sonny's Hemi Alum

N/A

2.66/2.00

560/375
67%
101/119
299/354
.574/.511

-
-
-
.539/.405

Sonny's Hemi Alum

N/A

2.66/2.00

N/A

610/422
69.2%
110/134
325/398
.455/.418

-
-
-
.539/.405

Sonny's Hemi 5.0 Inch BS Alum

N/A

2.68/2.04

N/A

615/425
69.1%
109/130
323/385
.455/.413

-
-
-
.543/.413

Sonny's Hemi 5.3 Inch BS Alum

N/A

2.80/2.10

N/A

700/480
68.6%
114/139
337/411
.496/.453

-
-
-
.567/.425

Sonny's Hemi 5.x Inch BS Alum

680/240

2.90/2.10

N/A

740/475
64.2%
112/137
332/406
.428/.379

-
-
1.09/1.98
.587/.425

Sonny's Symmetrical 5.0 Inch BS SF1020 Alum

650/350

2.75/2.00

N/A

-/450

660/-
111
329
.436

-
-
1.02
.557/.405

Sonny's Symmetrical 5.3 Inch BS SF1020 Alum

N/A

2.75/2.00

N/A

-/450

660/-
111
329
.436

-
-
-
.557/.405

Sonny's Symmetrical 5.3 Inch BS 16 x 5 Deg Alum

737/290

2.725/2.05

N/A

-/462

700/-
120
356
.467

-
-
0.95
.552/.415

Sonny's Symmetrical 16 x 5 Deg 5.0 Inch BS Billet Alum

540/236

2.52/1.93
4.67

562/400
71.2%
113/137
334/405
.54/.502

-
-
1.04/1.69
.510/.391

Sonny's Symmetrical 16 x 5 Deg 5.0 Inch BS Alum

570/236

2.52/1.93
4.67

562/400
71.2%
113/137
334/405
.54/.502

-
-
0.99/1.69
.510/.391

Sonny's Symmetrical 13 x 5 Deg Alum

574/236

2.55/1.93
4.75

74-75

550/375
68.2%
108/128
319/380
.588/.53

580/407
70.2%
114/139
336/412
.551/.511

565/391
69.2%
1.01/1.72
.516/.391

Sonny's Symmetrical 13 Deg Marine Alum

547/221

2.52/1.90
4.67

536/366
68.3%
107/129
318/382
.662/.60

556/381
68.5%
111/134
330/398
.601/.546

546/374
68.4%
1.02/1.72
.510/.385

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Sonny's 11 Deg Alum

N/A

2.65/1.89
4.75

N/A

605/395
65.3%
110/141
325/417
.553/.506

-
-
-
.537/.383

Sonny's 11 x 7 Deg 5.0 Inch BS Alum

N/A

2.62/1.90

N/A

590/400
67.8%
109/141
324/418
.546/.51

-
-
-
.531/.385

Sonny's 5.0 Inch BS Alum

574/236

2.55/1.93
4.75

580/407
70.2%
114/139
336/412
.551/.511

-
-
1.01/1.72
.516/.391

Sonny's 5.0 Inch BS Alum

N/A

2.65/1.89
4.75

N/A

247/185
74.9%
44.8/65.9
133/195
.677/.711

327/249
76.1%
59.3/88.8
176/263
.673/.718

404/291
72%
73.2/104
217/307
.665/.671

476/326
68.5%
86.3/116
256/344
.653/.627

537/359
66.9%
97.4/128
288/379
.631/.592

578/378
65.4%
105/135
311/399
.594/.545

610/402
65.9%
111/143
328/425
.502/.464

454/313
68.9%
-
.537/.383

Steve Schmidt Pro-Filer 12 Deg

N/A

2.40/1.88

N/A

495/365
73.7%
109/131
324/390
.562/.529

518/376
72.6%
115/135
339/401
.523/.484

518/376
72.6%
115/135
339/401
.471/.436

510/372
73%
-
.486/.381

Steve Schmidt Pro-filer 12 Deg Nitrous

N/A

515/390
75.7%
-

525/405
77.1%
-

525/412
78.5%
-

522/402
77.1%

Steve Schmidt Pro-Filer 24 Deg Alum

336/-

2.30/1.88

N/A

415/303
73%
99.9/109
296/323
.437/.39

-
-
1.24
.466/.381

Trick Flow Oval SF600 Alum

280/129

2.19/1.88
4.25
2" Pipe

113

74/64
86.5%

160/113
70.6%

231/146
63.2%
61.3/52.6
182/156
.767/.564

275/178
64.7%
73/64.1
216/190
.684/.516

316/209
66.1%
83.9/75.3
249/223
.629/.485

336/240
71.4%
89.2/86.5
264/256
.557/.464

347/264
76.1%
92.1/95.1
273/282
.493/.437

278/192
69.1%
1.24/2.05
.443/.381

Trick Flow Oval CCM Alum

280/-

2.30/1.88
-
Pipe

113

69/61
88.4%

141/126
89.4%

209/159
76.1%
50.3/57.3
149/170
.66/.615

260/192
73.8%
62.6/69.2
185/205
.616/.557

292/221
75.7%
70.3/79.6
208/236
.554/.513

318/246
77.4%
76.5/88.6
227/263
.502/.475

325/264
81.2%
78.2/95.1
232/282
.44/.437

258/201
78.2%
1.16
.466/.381

Trick Flow Oval CNC Inlet & Bowl Blend Alum

280/129

2.19/1.88
-
Pipe

113

74/64
86.5%

160/113
70.6%

231/146
63.2%
61.3/52.6
182/156
.767/.564

275/178
64.7%
73/64.1
216/190
.684/.516

316/209
66.1%
83.9/75.3
249/223
.629/.485

336/240
71.4%
89.2/86.5
264/256
.557/.464

347/264
76.1%
92.1/95.1
273/282
.493/.437

278/192
69.1%
1.24/2.05
.443/.381

Trick Flow R CNC Bowl Blend SF600 Alum

320/137

2.25/1.88
4.50
2" Pipe

122

75/64
85.3%

155/125
80.6%

230/166
72.2%
57.8/59.8
171/177
.743/.642

282/202
71.6%
70.9/72.8
210/216
.683/.586

320/241
75.3%
80.5/86.8
238/257
.62/.559

348/270
77.6%
87.5/97.3
259/288
.562/.522

360/290
80.6%
90.5/104
268/310
.498/.48

362/301
83.1%
91/108
270/321
.438/.436

294/228
77.5%
1.13/2.20
.456/.381

Trick Flow CNC SF600 Alum

320/137

2.25/1.88
-
No Pipe

121

73/64
87.7%

146-145/118
81.1%

222-220/160
72.4%
55.6/57.6
165/171
.714/.618

279-276/188
67.7%
69.8/67.7
207/201
.672/.545

318-315/215
67.9%
79.6/77.5
236/229
.613/.499

342-339/238
69.9%
85.6/85.7
254/254
.55/.46

359-352/258
72.6%
89.4/92.9
265/275
.492/.427

363-356/268
74.5%
90.4/96.5
268/286
.435/.388

288/206
71.7%
1.12/1.96
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

Trick Flow CNC 320 Weingartner Racing Alum

N/A

2.25/1.88
4.31
No Pipe

N/A

150-149/120
80.3%

220-213/160
73.9%
54.5/57.6
161/171
.699/.618

266-263/196
74.1%
66.5/70.6
197/209
.641/.568

309-308/230
74.6%
77.6/82.9
230/245
.598/.533

339-330/255
76.2%
84.1/91.9
249/272
.54/.493

354-347/267
76.2%
88.2/96.2
261/285
.485/.442

362-357/274
76.2%
90.4/98.7
268/292
.435/.397

367-362/282
77.4%
91.7/102
272/301
.392/.363

362-373/283
77%
92.4/102
274/302
.356/.328

302/230
76.1%
-
.456/.381

Trick Flow CNC 320 Weingartner Racing Alum

N/A

2.25/1.88
4.625
No Pipe

N/A

149-151/121
80.7%

225/159
70.7%
56.6/57.3
168/170
.727/.615

274-277/196
71.1%
69.3/70.6
205/209
.667/.568

323-315/230
72.1%
80.2/82.9
238/245
.618/.533

348-338/253
73.8%
86.3/91.1
256/270
.554/.489

357/265
74.2%
89.8/95.5
266/283
.494/.439

355-370/273
75.3%
91.2/98.3
270/291
.439/.396

362-378/278
75.1%
93.1/100
276/297
.398/.358

367-381/282
75.4%
94.1/102
279/301
.362/.327

308/229
74.1%
-
.456/.381

Trick Flow R CNC Bowl Blend SF600 Alum

340/137

2.25/1.88
-
Pipe

122

77/64
83.1%

160/125
78.1%

230/166
72.2%
57.8/59.8
171/177
.743/.642

283/202
71.4%
71.2/72.8
211/216
.686/.586

323/241
74.6%
81.2/86.8
241/257
.626/.559

350/270
77.1%
88/97.3
261/288
.565/.522

366/290
79.2%
92.1/104
273/310
.507/.48

370/301
81.4%
93.1/108
276/321
.448/.436

297/228
76.6%
1.09/2.20
.456/.381

Trick Flow R CNC Bowl Blend SF600 Alum

360/137

2.30/1.88
4.50
2" Pipe

122

75/64
85.3%

151/125
82.8%

227/166
73.1%
54.6/59.8
162/177
.717/.642

283/202
71.4%
68.1/72.8
202/216
.671/.586

325/241
74.2%
78.2/86.8
232/257
.616/.559

362/270
74.6%
87.1/97.3
258/288
.572/.522

382/290
75.9%
91.9/104
272/310
.517/.48

390/301
77.2%
93.9/108
278/321
.462/.436

303/228
75.2%
1.08/2.20
.466/.381

World Oval Port Iron CHP

260/-

2.25/1.88

119

71/50
70.4%

145/105
72.4%

205/146
71.2%
51.6/52.6
153/156
.662/.564

243/173
71.2%
61.1/62.3
181/185
.589/.502

267/190
71.2%
67.2/68.4
199/203
.517/.441

280/203
72.5%
70.4/73.1
209/217
.452/.392

282/209
74.1%
70.9/75.3
210/223
.39/.346

283/214
75.6%
71.2/77.1
211/228
.343/.31

244/177
72.7%
1.09
.456/.381

World 02003 Kendrick Auto Alum

310/-

2.25/1.88

116

81/70
86.4%

151/115
76.2%

223/179
80.3%
56.1/64.5
166/191
.72/.692

276/179
64.9%
69.4/64.5
206/191
.669/.519

308/192
62.3%
77.5/69.2
230/205
.597/.445

317/198
62.5%
79.7/71.3
236/211
.512/.383

321/201
62.6%
80.7/72.4
239/215
.444/.333

266/177
66.7%
1.04
.456/.381

World 02003 Ported Kendrick Auto Alum

310/-

2.25/1.88

116

87/71
81.6%

160/123
76.9%

230/186
80.9%
57.8/67
171/199
.743/.719

288/187
64.9%
72.4/67.4
215/200
.698/.542

323/211
65.3%
81.2/76
241/225
.626/.489

348/240
69%
87.5/86.5
259/256
.562/.464

353/253
71.7%
88.8/91.1
263/270
.489/.419

284/200
70.5%
1.14
.456/.381

World 03003 Kendrick Auto Iron

310/-

2.25/1.88

N/A

72/70
97.2%

151/120
79.5%

229/152
66.4%
57.6/54.8
171/162
.74/.588

273/182
66.7%
68.7/65.6
203/194
.661/.528

308/195
63.3%
77.5/70.2
230/208
.597/.452

321/201
62.6%
80.7/72.4
239/215
.518/.388

326/206
63.2%
82/74.2
243/220
.451/.341

268/176
65.7%
1.05
.456/.381

World 03003 Ported Kendrick Auto Iron

310/-

2.25/1.88

N/A

90/70
77.8%

172/119
69.2%

258/170
65.9%
64.9/61.2
192/181
.833/.657

285/194
68.1%
71.7/69.9
212/207
.69/.562

326/221
67.8%
82/79.6
243/236
.632/.513

353/240
68%
88.8/86.5
263/256
.57/.464

368/256
69.6%
92.6/92.2
274/273
.509/.424

294/200
68.1%
1.19
.456/.381

World Merlin Ported Bullet Cylinder Heads

N/A

2.19/1.88

N/A

80/72
90%

153/121
79.1%

214/163
76.2%
56.8/58.7
168/174
.71/.63

253/202
79.8%
67.2/72.8
199/216
.63/.586

303/233
76.9%
80.4/83.9
238/249
.603/.54

334/250
74.9%
88.7/90.1
263/267
.554/.483

354/263
74.3%
94/94.7
278/281
.503/.436

269/205
76.5%
-
.443/.381

World Merlin Iron CHP

310/-

2.25/1.88
4.25
2.25" Pipe

N/A

158/100
63.3%

216/141
65.3%
54.3/50.8
161/151
.698/.545

258/175
67.8%
64.9/63
192/187
.625/.507

292/193
66.1%
73.4/69.5
218/206
.566/.448

313/207
66.1%
78.7/74.6
233/221
.505/.40

325/213
65.5%
81.7/76.7
242/227
.45/.353

327/222
67.9%
82.2/80
244/237
.396/.322

270/179
66.2%
1.05
.456/.381

World Merlin Alum CHP

310/132

2.25/1.88
4.25
2.25" Pipe

N/A

144/129
89.6%

217/173
79.7%
54.6/62.3
162/185
.701/.669

269/195
72.5%
67.7/70.2
200/208
.652/.565

289/207
71.6%
72.7/74.6
215/221
.56/.48

296/214
72.3%
74.4/77.1
221/228
.478/.414

305/214
70.2%
76.7/77.1
227/228
.422/.355

312/214
68.6%
78.5/77.1
233/228
.378/.31

262/192
73.5%
1.01/1.62
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

World Merlin II Weingartner Racing Brez

N/A

2.30/1.88
4.31
No Pipe

N/A

79/57
72.2%

159/104
65.4%

237/150
63.3%
57/54
169/160
.749/.58

282/186
66%
67.9/67
201/199
.668/.539

330/212
64.2%
79.4/76.4
235/226
.626/.492

354/229
64.7%
85.2/82.5
252/244
.559/.443

366/240
65.6%
88.1/86.5
261/256
.496/.398

353/255
72.2%
85/91.9
252/272
.418/.37

297/197
66.1%
-
.466/.381

World Merlin 269 SF600 Iron

269/137

2.19/1.88
-
No Pipe

119

75/65
86.7%

144/121
84%

213/165
77.5%
56.5/59.4
168/176
.707/.638

275/202
73.5%
73/72.8
216/216
.684/.586

323/239
74%
85.7/86.1
254/255
.643/.554

352/262
74.4%
93.4/94.4
277/280
.584/.506

355/274
77.2%
94.2/98.7
279/292
.505/.454

341/282
82.7%
90.5/102
268/301
.424/.409

286/221
77.1%
1.32/2.06
.443/.381

World Merlin 310 SF600 Iron

310/137

2.30/1.88
-
No Pipe

119

79/59
74.7%

144/99
68.8%

208/151
72.6%
50.1/54.4
148/161
.657/.584

267/193
72.3%
64.3/69.5
190/206
.633/.56

321/232
72.3%
77.3/83.6
229/248
.609/.538

363/259
71.3%
87.4/93.3
259/276
.573/.501

383/276
72.1%
92.2/99.4
273/295
.519/.457

374/286
76.5%
90/103
267/305
.443/.415

294/214
72.6%
1.24/2.09
.466/.381

World Merlin 345 SF600 Iron

345/137

2.30/1.88
-
No Pipe

119

77/60
77.9%

145/102
70.3%

213/159
74.6%
51.3/57.3
152/170
.673/.615

271/204
75.3%
65.2/73.5
193/218
.642/.591

326/239
73.3%
78.5/86.1
232/255
.618/.554

366/261
71.3%
88.1/94
261/279
.578/.504

389/275
70.7%
93.6/99.1
277/294
.527/.456

374/284
75.9%
90/102
267/303
.443/.412

298/218
73.1%
1.13/2.07
.466/.381

World Merlin 320 SF600 Alum

320/-

2.30/1.88
-
No Pipe

119

77/69
89.6%

148/120
81.1%

218/155
71.1%
52.5/55.8
155/165
.689/.599

278/185
66.5%
66.9/66.6
198/197
.659/.536

320/215
67.2%
77/77.5
228/229
.607/.499

352/242
68.8%
84.7/87.2
251/258
.556/.468

372/263
70.7%
89.5/94.7
265/281
.504/.436

375/280
74.7%
90.3/101
267/299
.444/.406

295/209
70.8%
1.17
.466/.381

World Merlin 345 SF600 Alum

345/-

2.30/1.88
-
No Pipe

119

82/71
86.6%

153/108
70.6%

221/151
68.3%
53.2/54.4
158/161
.698/.584

284/184
64.8%
68.4/66.3
203/196
.673/.533

331/217
65.6%
79.7/78.2
236/232
.628/.503

369/245
66.4%
88.8/88.3
263/262
.583/.474

399/267
66.9%
96/96.2
285/285
.54/.442

414/284
68.6%
99.6/102
295/303
.491/.412

310/208
67.1%
1.20
.466/.381

World Merlin 350 CNC SF600 Alum

350/135

2.30/1.88
-
No Pipe

119

82/68
82.9%

149/120
80.5%

220/156
70.9%
53/56.2
157/167
.695/.603

288/200
69.4%
69.3/72
205/213
.682/.58

340/242
71.2%
81.8/87.2
242/258
.645/.561

381/269
70.6%
91.7/96.9
272/287
.602/.52

413/295
71.4%
99.4/106
295/315
.559/.489

426/313
73.5%
103/113
304/334
.505/.454

317/228
71.9%
1.22/2.32
.466/.381

World Merlin III Oval SF600 Iron

269/137

2.30/1.88
-
No Pipe

119

316/290
91.8%
76.1/104
225/310
.374/.42

-
-
1.17/2.12
.466/.381

World Merlin III Oval SF1200 Iron

269/137

2.30/1.88
-
No Pipe

119

293/268
91.5%
70.5/96.5
209/286
.347/.388

-
-
1.09/1.96
.466/.381

World Merlin III SF600 Alum

310/132

2.30/1.88
-
No Pipe

119

400/290
72.5%
96.3/104
285/310
.542/.48

-
-
1.29/2.20
.466/.381

World Merlin III SF1020 Alum

310/132

2.30/1.88
-
No Pipe

119

372/268
72%
89.5/96.5
265/286
.504/.444

-
-
1.20/2.03
.466/.381

World Merlin III SF600 Alum

350/132

2.30/1.88
-
No Pipe

119

410/303
73.9%
98.7/109
292/323
.486/.439

-
-
1.17/2.30
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

1.200

1.300

Average

World Merlin III SF1020 Alum

350/132

2.30/1.88
-
No Pipe

119

382/280
73.3%
91.9/101
272/299
.453/.406

-
-
1.09/2.12
.466/.381

World Merlin III CNC SF600 Alum

350/132

2.30/1.88
-
No Pipe

119

434/321
74%
104/116
310/343
.514/.465

-
-
1.24/2.43
.466/.381

World Merlin III CNC SF1020 Alum

350/132

2.30/1.88
-
No Pipe

119

405/297
73.3%
97.5/107
289/317
.48/.431

-
-
1.16/2.25
.466/.381

World Merlin III CNC SF600 Alum

375/132

2.30/1.88
-
No Pipe

119

440/324
73.6%
106/117
314/346
.521/.47

-
-
1.17/2.45
.466/.381

World Merlin III CNC SF1020 Alum

375/132

2.30/1.88
-
No Pipe

119

410/300
73.2%
98.7/108
292/320
.486/.435

-
-
1.09/2.27
.466/.381

World Merlin X 345 16 Deg SF600 Alum

345/132

2.35/1.88

77/64
83.1%

134/107
79.9%

187/148
79.1%
43.1/53.3
128/158
.578/.572

245/183
74.7%
56.5/65.9
167/195
.568/.531

303/214
70.6%
69.9/77.1
207/228
.562/.496

349/214
61.3%
80.5/77.1
238/228
.54/.414

379/254
67%
87.4/91.5
259/271
.502/.421

392/265
67.6%
90.4/95.5
268/283
.455/.384

284/198
69.6%
1.14/2.01
.476/.381

World Merlin X 345 16 Deg CNC SF600 Alum

350/132

2.35/1.88

68/56
82.4%

143/126
88.1%

228/177
77.6%
52.6/63.8
156/189
.705/.684

299/205
68.6%
68.9/73.8
204/219
.693/.594

349/231
66.2%
80.5/83.2
238/247
.648/.536

391/255
65.2%
90.1/91.9
267/272
.605/.493

415/273
65.8%
95.7/98.3
283/291
.55/.452

451/286
63.4%
104/103
308/305
.523/.415

325/222
68.2%
1.29/2.17
.476/.381

World Jenkins Merlin

N/A

2.25/1.88

N/A

73/66
90.4%

144/129
89.6%

217/173
79.7%
54.6/62.3
162/185
.701/.669

269/195
72.5%
67.7/70.2
200/208
.652/.565

289/207
71.6%
72.7/74.6
215/221
.56/.48

296/214
72.3%
74.4/77.1
221/228
.478/.414

305/214
70.2%
76.7/77.1
227/228
.422/.355

312/215
68.9%
78.5/77.5
233/229
.378/.312

262/192
73.5%
-
.456/.381

World Jenkins Alum

345/-

2.30/1.88

117

298/212
71.1%
71.7/76.4
213/226
.565/.492

330/230
69.7%
79.4/82.9
235/245
.521/.445

360/230
63.9%
86.6/82.9
257/245
.487/.381

329/224
68%
1.04
.466/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

Average

348 Iron

N/A

1.94/1.66

N/A

155/135
87.1%
52.4/62.4
155/185
.581/.591

195/148
75.9%
66/68.4
195/203
.548/.486

200/155
77.5%
67.7/71.6
200/212
.45/.407

203/160
78.8%
68.7/73.9
203/219
.38/.35

203/163
80.3%
68.7/75.3
203/223
.326/.306

191/152
79.6%
-
.393/.336

348 Iron

N/A

2.055/1.66

N/A

56/49
87.5%

108/85
78.7%

158/120
75.9%
47.6/55.4
141/164
.559/.525

190/143
75.3%
57.3/66.1
170/196
.504/.47

201/156
77.6%
60.6/72.1
180/214
.426/.41

205/161
78.5%
61.8/74.4
183/220
.362/.352

210/163
77.6%
63.3/75.3
188/223
.318/.306

179/138
77.2%
-
.416/.336

Hi-Po 348 Iron

N/A

2.06/1.72

N/A

210/-
63
187
.37

-
-
-
.417/.348

Hi-Po Iron

N/A

2.203/1.734

N/A

260/-
68.2
202
.429

-
-
-
.446/.351

L80 Iron

N/A

2.19/1.72

N/A

277/195
70.4%
73.5/83.9
218/249
.394/.353

-
-
-
.443/.348

690 '63 John Goodman Iron

N/A

2.19/1.72

N/A

68/48
70.6%

131/99
75.6%

192/141
73.4%
51/60.7
151/180
.637/.596

228/167
73.2%
60.5/71.9
179/213
.567/.529

252/180
71.4%
66.9/77.5
198/230
.502/.456

267/182
68.2%
70.9/78.3
210/232
.443/.384

274/-
72.7
216
.39

224/154
-
-
.443/.348

690 Skip Fix Cleaned Up Iron

N/A

2.19/1.72

N/A

142/86
60.6%

211/121
57.3%
56/52.1
166/154
.70/.511

255/150
58.8%
67.7/64.6
201/191
.635/.475

268/170
63.4%
71.1/73.2
211/217
.534/.431

277/180
65%
73.5/77.5
218/230
.46/.38

231/141
61.3%
-
.443/.348

Hi-Po 3814690 / L80 Ported Superior Automotive CCM SF600 Iron

N/A

2.25/1.725

N/A

203/154
75.9%
51.1/65.9
151/195
.656/.649

300/236
78.7%
75.5/101
224/299
.484/.497

252/195
77.5%
-
.456/.349

Hi-Po Ported Iron

N/A

91/-

148/-

211/-
-

267-

280-
.050%
-

300/-
.050%
-

.050%
-

305/225
73.8%
-

307/-
-

309/-
-

232/56.3

Edelbrock Alum

N/A

2.19/1.72
4.31

N/A

138/98
71%

210/135
64.3%
55.7/58.1
165/172
.697/.57

246/168
68.3%
65.3/72.3
194/214
.612/.532

259/190
73.4%
68.8/81.8
204/242
.516/.482

269/201
74.7%
71.4/86.5
212/256
.446/.425

274/209
76.3%
72.7/89.9
216/267
.39/.378

233/167
71.7%
-
.443/.348

Edelbrock 60819 CNC Alum

220/115

2.19/1.72
4.31

67/60
89.6%

148/118
79.7%

221/157
71%
58.7/67.6
174/200
.733/.663

256/184
71.9%
68/79.2
201/235
.637/.583

266/204
76.7%
70.6/87.8
209/260
.53/.517

273/216
79.1%
72.5/93
215/275
.453/.456

277/221
79.8%
73.5/95.1
218/282
.394/.40

240/183
76.3%
1.26/1.92
.443/.348

Edelbrock Performer RPM 60809 SF1020 Alum

215/115

2.19/1.72

N/A

65/52
80%

130/96
73.8%

192/127
66.1%
51/54.7
151/162
.637/.537

235/163
69.4%
62.4/70.2
185/208
.585/.517

258/182
70.5%
68.5/78.3
203/232
.514/.461

260/190
73.1%
69/81.8
205/242
.431/.401

215/152
70.5%
1.21/1.65
.443/.348

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

1.000

1.100

Average

Edelbrock Performer RPM 60809 Alum

220/90

2.19/1.72

N/A

73/62
84.9%

143/118
82.5%

203/158
77.8%
53.9/68
160/201
.674/.668

239/185
77.4%
63.4/79.6
188/236
.595/.586

260/205
78.8%
69/88.2
205/261
.518/.52

272/217
79.8%
72.2/93.4
214/277
.451/.458

285/222
77.9%
75.7/95.5
224/283
.405/.402

234/184
78.8%
1.30/2.47
.443/.348

Edelbrock Ported Calvin Saenz J-600 Hill Alum

N/A

2.19/1.72
4.32

N/A

86/73
84.9%

178/121
68%

245/161
65.7%
65/69.3
193/205
.813/.68

283/204
72.1%
75.1/87.8
223/260
.704/.646

312/242
77.6%
82.8/104
245/309
.621/.613

315/260
82.5%
83.6/112
248/332
.523/.549

310/272
87.7%
82.3/117
244/347
.441/.493

274/210
76.7%
-
.443/.348

Edelbrock John Goodman Alum

N/A

2.19/1.72

N/A

69/53
76.8%

144/117
81.3%

211/161
76.3%
56/69.3
166/205
.70/.68

257/194
75.5%
68.2/83.5
202/247
.64/.615

279/218
78.1%
74.1/93.8
219/278
.556/.553

285/227
79.6%
75.7/97.7
224/289
.473/.48

287/229
79.8%
76.2/98.6
226/292
.408/.415

244/191
78.3%
-
.443/.348

Edelbrock John Goodman Ported Alum

N/A

2.19/1.72

N/A

68/57
83.8%

141/119
84.4%

211/164
77.7%
56/70.6
166/209
.70/.693

266/192
72.2%
70.6/82.6
209/245
.662/.608

296/221
74.7%
78.6/95.1
233/282
.589/.56

305/236
77.4%
81/102
240/301
.506/.499

312/242
77.6%
82.8/104
245/309
.444/.438

316/245
77.5%
83.9/105
249/312
.393/.388

264/203
76.8%
-
.443/.348

409Raceparts Mild Port Cleanup Alum

N/A

91/78
85.7%

148/119
80.4%

211/152
72%
-

267/179
67%
-

288/198
68.8%
-

300/210
70%
-

305/218
71.5%
-

307/226
73.6%
-

261/186
71.3%

409Raceparts Race Ported Alum

N/A

2.25/1.88

N/A

77/73
94.8%

145/124
85.5%

217/171
78.8%
54.6/61.6
162/183
.701/.661

280/201
71.8%
70.4/72.4
209/215
.678/.583

323/223
69%
81.2/80.3
241/238
.626/.517

349/236
67.6%
87.8/85
260/252
.564/.456

359/245
68.2%
90.3/88.3
268/262
.497/.406

362/252
69.6%
91/90.8
270/269
.438/.365

291/207
71.4%
-
.456/.381

409Raceparts Ported Alum

N/A

2.25/1.88

N/A

101/73
72.3%

178/124
69.7%

251/171
68.1%
63.1/61.6
187/183
.811/.661

303/201
66.3%
76.2/72.4
226/215
.734/.583

330/223
67.6%
83/80.3
246/238
.64/.517

341/236
69.2%
85.8/85
254/252
.551/.456

353/245
69.4%
88.8/88.3
263/262
.489/.406

360/252
70%
90.5/90.8
268/269
.436/.365

302/207
68.6%
-
.456/.381

409Raceparts Ported Fast Fred Alum

N/A

2.25/1.88
4.35
No Pipe

N/A

86/90
104%

163/153
93.9%

237/200
84.4%
59.6/72
177/213
.765/.773

298/232
77.9%
74.9/83.6
222/248
.722/.673

334/261
78.1%
84/94
249/279
.647/.605

343/287
83.7%
86.3/103
256/306
.554/.555

352/292
83%
88.5/105
262/312
.487/.484

288/238
82.5%
-
.456/.381

Manufacturer
Part Number

Port/Vol
Int/Exh

Valve Size Int/Exh

Comb. Chamber Vol

.100

.200

.300

.400

.500

.600

.700

.800

.900

Average

Chrysler 2.2 445

N/A

Stock

N/A

53/39
73.6%

103/75
72.8%

140/97
69.3%
-

156/113
72.4%
-

165/123
74.5%
-

141/102
72.3%

Chrysler '93-94 782

N/A

Stock