Cylinder Heads
Recommended for agressive street or street/strip applications with displacements up to 540 cubic inches, operating at or below 6800 RPM. Featuring fully CNC machined intake runners, exhaust ports and combustion chambers. These heads are capable of flowing 387 CFM at 0.800" of lift.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-Angle Valve Job |
|
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L | |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | |
| 10° 11/32” Valve Keepers with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 315cc Competition Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | |
| Int | 163 | 239 | 301 | 349 | 380 | 386 | 387 |
| Exh | 138 | 184 | 238 | 271 | 285 | 293 | 299 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.600", 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
315cc
|
| Intake Port Dimension |
2.450"H x 1.755"W x 13/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.780"H x 2.025" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (As Cast) |
n/a
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 114cc
|
| Angle Mill |
.009" per cc/Maximum 104cc
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.151 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6853 (.120" Thick)
|
| Intake Port Gasket |
AFR #6855 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3924 (Pump Gas) / 3922 (Race Gas)
|
|
Note: 1” longer head bolt needed on four bottom exhaust bolt holes. |
|
Recommended for radical "Pro Street" or racing applications with displacements up to 605 cubic inches, operating at or below 7400 RPM. AFR's 357cc cylinder heads features fully CNC machined intake runners, exhaust ports and combustion chambers; capable of flowing 425 CFM at 0.800" of lift. These cylinder heads now come standard with Titanium retainers.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5 Angle Valve Job |
|
| 11/32" Intake Valve, 2.300" x5.500" O.A.L | |
| 11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Titanium Retainers 1.500" O.D x 1.180" I.D x .765" I.D | |
| 10° 11/32" Valve Locks with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 357cc Competition Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | |
| Int | 167 | 242 | 307 | 354 | 389 | 409 | 419 |
| Exh | 135 | 199 | 249 | 276 | 288 | 295 | 305 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.600", intake 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
357cc
|
| Intake Port Dimension |
2.515"H x 1.780"W x 11/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.780"H x 2.025" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 114cc
|
| Angle Mill |
.009" per cc/Maximum 104cc
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.435 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6854 (.120" Thick)
|
| Intake Port Gasket |
AFR #6856 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3924 (Pump Gas) / 3922 (Race Gas)
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Recommended for radical streep/strip or "Pro Street" applications with displacements up to 572 cubic inches, operating at or belwo 7000 RPM. Featuring fully CNC machined intake runners, exhaust ports and combustion chambers; these heads are capable of flowing 410 CFM at 0.800" of lift.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5 Angle Valve Job | |
| 11/32" Intake Valve, 2.300" x5.500" O.A.L | |
| 11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | |
| 10° 11/32" Valve Locks with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 335cc Competition Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | |
| Int | 164 | 240 | 304 | 352 | 385 | 401 | 409 |
| Exh | 135 | 199 | 249 | 276 | 288 | 295 | 305 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.600", intake 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
335cc
|
| Intake Port Dimension |
2.455"H x 1.755"W x 13/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.780"H x 2.025" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 114cc
|
| Angle Mill |
.009" per cc/Maximum 104cc
|
| Note: Angle mills might require a .120" thick intake gasket. | |
| Minimum Cross Sectional Area |
3.275 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6853 (.120" Thick)
|
| Intake Port Gasket |
AFR #6855 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Pump Gas 3924 / Race Gas 3922
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Best suited for +540 cubic inch large displacement big block chevy racing engines, operating at or below 7600 RPM. Our 37cc cylinder heads feature fully CNC machined intake runners, exhaust ports and combustion chambers. Equipped with Titanium retainers and high quality components, these heads are capable of flowing 437 CFM at 0.900" of lift.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5 Angle Valve Job |
|
| 11/32" Intake Valve, 2.300" x5.500" O.A.L | |
| 11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Titanium Retainer 1.500" O.D x 1.180" I.D x .765" I.D | |
| 10° 11/32” Valve Keepers with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 377cc Competition Flow Chart | ||||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | .900 | |
| Int | 168 | 247 | 311 | 355 | 405 | 420 | 429 | 432 |
| Exh | 134 | 190 | 240 | 280 | 299 | 308 | 314 | 319 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.600", intake 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
377cc
|
| Intake Port Dimension |
2.520" H x 1.800" W x 13/32° Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.780"H x 2.025" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 114cc
|
| Angle Mill |
.009" per cc/Maximum 104cc
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.860 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6854 (.120" Thick)
|
| Intake Port Gasket |
AFR #6856 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3932
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Our largest and best flowing 24° big block chevy cylinders heads, these cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers. Best suited for +540 cubic inch large displacement racing engines, operating at or below 7600 RPM. Equipped with Titantium retainers and high quality components, these heads are capable of flowing 456 CFM at 0.900" of lift.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5 Angle Valve Job |
|
| 11/32" Intake Valve, 2.350" x 5.500" O.A.L | |
| 11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Titanium Retainer 1.500" O.D x 1.180" I.D x .765" I.D | |
| 10° 11/32" Valve Locks with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 385cc BBC | ||||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | .900 | |
| Int | 169 | 249 | 312 | 359 | 411 | 428 | 439 | 449 |
| Exh | 139 | 190 | 245 | 280 | 299 | 309 | 315 | 321 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.600", intake 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
385cc
|
| Intake Port Dimension |
2.565"H x 1.810"W x 15/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.780"H x 2.025" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 114cc
|
| Angle Mill |
.009" per cc/Maximum 104cc
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.890 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6854 (.120" Thick)
|
| Intake Port Gasket |
AFR #6856 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3932
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
AFR's 335cc BBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your 509 to 540 Cubic Inch operating below 6500 RPM. They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring seats and our one piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 are required per engine.
| Included Components | |
| 3-angle Valve Job | |
| As Cast Combustion Chambers | |
| As Cast Exhaust Ports | |
|
As Cast Intake Ports |
|
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L | |
| 11/32” Nail Head Exhaust Valve, 1.880” x 5.450” O.A.L. | |
| PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700 | |
| 10º Steel Retainers 1.500” O.D x 1.120” I.D x .705” I.D | |
| 10° 11/32" Valve Locks with lashcap recess | |
| ARP 7/16" Rocker Exhaust Studs | |
| ARP 7/16" Rocker Intake Studs | |
| 3/8” Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Valve Spring I.D Locator 1.550” O.D x .705” I.D | |
| 335cc BBC Enforcer Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .700 | |
| Int | 140 | 207 | 265 | 296 | 336 | 355 |
| Exh | 119 | 172 | 211 | 239 | 249 | 255 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
335cc
|
| Intake Port Dimension |
2.510"H x 1.820"W x 3/8" Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
140cc
|
| Exhaust Port Dimension |
1.690"H x 1.900" W
|
| Exhaust Port Location |
.357" Raised
|
| Combustion Chamber Size(As Cast) |
122cc
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.750"
|
| Max Valve Spring Pocket Machining |
1.750"
|
| Warning::Do not machine spring pad any deeper. | |
| Deck Thickness |
0.45"
|
| Minimum Bore Diameter |
4.25"
|
| Flat Mill |
.006" per cc/ Maximum 114cc As Cast
|
| Angle Mill |
.009" per cc/Maximum 108cc As Cast
|
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket | |
| Important:Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. . | |
| Exhaust Port Gasket | |
| Head Gasket, Fel-Pro #1047 (Gen V and VI) | |
| Head Gasket, Fel-Pro #1017-1 (Gen IV) | |
| Head Bolts, ARP 135-3703 (Gen IV) | |
| Head Bolts, ARP 135-3707 (Gen V) | |
| Head Studs, ARP 235-4713 | |
| Head Bolt Washers, Manley | |
| Suggested Manifold |
Victor Jr or Super Victor
|
| Spark Plug Starting Range |
Autolite 3924
|
Recommended for more aggressive street or street/strip big block Chevy applications with displacements up to 540 cubic inches, operating at or below 6800 RPM. The 325cc magnum cylinder head intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend. Capable of flowing 390 CFM at 0.700" of lift.
| Included Components | |
| 50% CNC Ported Combustion Chambers | |
| 20% CNC Ported Exhaust Ports | |
| 30% CNC Ported Intake Ports | |
|
Competition 5 Angle Valve Job |
|
| 11/32" Intake Valve, 2.300" x5.500" O.A.L | |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | |
| 10° 11/32" Valve Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs Intake | |
| ARP 7/16" Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 325cc w/ 100% CNC Chamber Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .700 | |
| Int | 155 | 227 | 281 | 319 | 346 | 368 |
| Exh | 135 | 195 | 240 | 254 | 262 | 266 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.310", intake 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
325cc
|
| Intake Port Dimension |
2.360"H x 1.685"W x 3/8 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
132cc
|
| Exhaust Port Dimension |
1.720"H x 1.920" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (As Cast) |
117cc
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 108cc As Cast or 114cc CNC Chamber
|
| Angle Mill |
.009" per cc/Maximum 104cc As Cast or CNC Chamber
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.111 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6853 (.120" Thick)
|
| Intake Port Gasket |
AFR #6855 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| Stud Mount Rocker Arms (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3924
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Recommended for moderate street or street/strip applications with displacements up to 509 cubic inches, operating at or below 6500 RPM. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend. These 305cc big block Chevy magnum cylinder heads are capable of flowing 368 CFM at 0.700" of lift.
| Included Components | |
| 50% CNC Ported Combustion Chambers | |
| 20% CNC Ported Exhaust Ports | |
| 30% CNC Ported Intake Ports | |
|
Competition 5-Angle Valve Job |
|
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L | |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | |
| 10° 11/32” Valve Keepers with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 305cc As Cast Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .650 | |
| Int | 146 | 215 | 272 | 310 | 341 | 358 |
| Exh | 129 | 179 | 215 | 239 | 253 | 260 |
| 305cc w/ 100% CNC Chamber Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .650 | |
| Int | 154 | 225 | 280 | 316 | 345 | 362 |
| Exh | 133 | 187 | 223 | 249 | 259 | 264 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.310", 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
305cc
|
| Intake Port Dimension |
2.380"H x 1.680"W x 11/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
132cc
|
| Exhaust Port Dimension |
1.720"H x 1.920" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (As Cast) |
117cc
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 108cc as cast or 114cc CNC Chamber
|
| Angle Mill |
.009" per cc/ Maximum 104cc as cast or CNC Chamber
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.993 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6853 (.120" Thick)
|
| Intake Port Gasket |
AFR #6855 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3924
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
AFR's 345cc BBC cylinder head is recommended for radical street/strip, "Pro Street," or racing applications with displacements up to 572 cubic inches, operating at or below 7000 RPM. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend. These heads are capable of flowing 401 CFM at 0.700" of lift.
| Included Components | |
| 50% CNC Ported Combustion Chambers | |
| 20% CNC Ported Exhaust Ports | |
| 30% CNC Ported Intake Ports | |
|
Competition 5 Angle Valve Job |
|
| 11/32" Intake Valve, 2.300" x5.500" O.A.L | |
| 11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L | |
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) | |
| 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | |
| 10° 11/32" Valve Locks with lashcap recess | |
| ARP 7/16” Rocker Studs Intake | |
| ARP 7/16” Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 345cc BBC Partial CNC Chamber Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .700 | |
| Int | 149 | 221 | 280 | 322 | 360 | 382 |
| Exh | 129 | 184 | 222 | 251 | 259 | 264 |
| 345cc BBC Full CNC Chamber Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .600 | .700 | |
| Int | 157 | 231 | 289 | 336 | 365 | 375 |
| Exh | 138 | 193 | 236 | 253 | 262 | 266 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.500", intake 3/4" radius plate exhaust, 2 1/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
345cc
|
| Intake Port Dimension |
2.435"H x 1.765"W x 13/32° Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
132cc
|
| Exhaust Port Dimension |
1.720"H x 1.920" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (As Cast) |
117cc
|
| Combustion Chamber Size (Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 108cc As Cast or 114cc CNC Chamber
|
| Angle Mill |
.009" per cc/Maximum 104cc As Cast or CNC Chamber
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.263 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket |
AFR #6854 (.120" Thick)
|
| Intake Port Gasket |
AFR #6856 (.060" Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3924
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Our medium sized 290cc oval port cylinder head is recommended for moderate street or street/strip big block chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. Features 100% CNC machined intake runners , exhaust ports and combustion chambers; capable of flowing 375 CFM at 0.700" of lift.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-angle Valve Job |
|
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L | |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length | |
| PAC Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 220 lbs. on seat, .710” maximum lift, - 260* max recommended duration, Max RPM 7200-7400 (upgrades available) | |
| PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700 | |
| 10° Steel Retainers 1.500" O.D x 1.120"I.D x .705" I.D | |
| 10° 11/32" Valve Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs Intake | |
| ARP 7/16" Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D - For 8000 Spring | |
| Hardened Valve Spring I.D Locator 1.655" O.D x 1.565" I.D – For 8002 Spring | |
| Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 290cc Competition Flow Chart | ||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | |
| Int | 159 | 233 | 289 | 327 | 339 | 354 | 362 | 369 |
| Exh | 135 | 180 | 230 | 262 | 271 | 278 | 286 | 292 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.310", intake 3/4" radius plate exhaust, 1 7/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
290cc
|
| Intake Port Dimension |
2.030"H x 1.830"W x1/2 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.770"H x 2.010" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size(Full CNC) |
112cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 102cc
|
| Angle Mill |
.009" per cc/ Maximum 97cc
|
| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.895 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: This product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only. |
|
| Recommended Components: | |
| Intake Port Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold | |
| Suggested Manifold |
Air Gap #7561
|
| Spark Plug Starting Range |
Autolite 3924
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Recommended for agressive street, street/strip or race big block chevys with displacements up to 540 cubic inches operating at or below 6800 RPM. The 300cc oval port cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers; our 300cc oval port flows 388 CFM at 0.700" lift and is the ultimate street/race weapon without having to step up to a rectangular port design.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-Angle Valve Job |
|
| 11/32" Intake Valve, 2.300" x 5.500" O.A.L | |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length | |
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PAC Racing Spring #1224 1.625 O.D. Solid Roller Dual Valve Spring, 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600, Uses #8518 Steel Retainer (upgrades available) |
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| 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | |
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PAC Racing #1940 1.550" OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725" maximum lift, Max RPM 6500-6700; Uses #8511 Steel Retainer and #8044 Spring Cup |
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| 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D | |
| 10° 11/32" Valve Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs Intake | |
| ARP 7/16" Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740” O.D / 1.650” I.D | |
| Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 300cc Competition Flow Chart | ||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | |
| Int | 161 | 238 | 298 | 342 | 359 | 374 | 384 | 388 |
| Exh | 139 | 191 | 234 | 266 | 275 | 289 | 294 | 298 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.500", 3/4" radius plate exhaust, 1 7/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
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| Intake Port Volume |
300cc
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| Intake Port Dimension |
2.055"H x 1.840"W x1/2 Radius
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| Intake Port Location |
Stock
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| Exhaust Port Volume |
135cc
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| Exhaust Port Dimension |
1.770"H x 2.010" W
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| Exhaust Port Location |
.375" Raised
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| Combustion Chamber Size (Full CNC) |
112cc
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| Valve Cover Bolt Pattern |
Perimeter Bolt
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| Valve Angle |
24°/4° Int, 15°/4° Exh
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| Valve Spring Pocket Diameter |
1.725" O.D
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| Max Valve Spring Pocket Machining |
1.750" O.D
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| Deck Thickness |
.750"
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| Minimum Bore Diameter |
4.250"
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| Flat Mill |
.006" per cc/ Maximum 102cc
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| Angle Mill |
.009" per cc/ Maximum 97cc
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| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.020 sq. in.
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| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
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|
CARB Status: This product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only. |
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| Recommended Components: | |
| Intake Port Gasket |
GM #12366985 or AFR #6863
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
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| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
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| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
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| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
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| Head Studs |
ARP 235-4713 or AFR #6307
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| Head Bolt Washers |
Manley, AFR #6320
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| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
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| Suggested Manifold |
Victor Jr
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| Suggested Manifold | |
| Spark Plug Starting Range |
Autolite 3924
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| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Our small port, high velocity 265cc cylinder heads are a cost effective choice compared to re-worked factory big block chevy cylinder heads. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend; this torque monster is capable of flowing 354 CFM at 0.650" lift. Recommended for street, street/strip and towing applications with displacements up to 468 cubic inches operating at or below 6200 RPM.
| Included Components | |
| 75% CNC Ported Exhaust Ports (Bowl Blend), 75% CNC Chambers | |
| 80% CNC Ported Intake Ports (Bowl Blend) | |
|
Competition 5-angle Valve Job |
|
| 11/32" Intake Valve, 2.190" x 5.460" Overall Valve Length | |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length | |
| PAC Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 220 lbs. on seat, .710” maximum lift, - 260* max recommended duration, Max RPM 7200-7400 (upgrades available) | |
| PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700 | |
| 10° Steel Retainers 1.500" O.D x 1.120"I.D x .705" I.D | |
| 10° 11/32" Valve Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs Intake | |
| ARP 7/16" Rocker Studs Exhaust | |
| Adjustable 3/8" Guide Plates | |
| 11/32" Viton Valve Seals | |
| Hardened Valve Spring Cup 1.655" O.D x 1.565" I.D – For 8002 Spring | |
| Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D - For 8000 Spring | |
| Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep | |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | |
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 265cc As Cast Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 154 | 218 | 278 | 323 | 330 | 333 | 335 |
| Exh | 127 | 164 | 200 | 230 | 250 | 255 | 260 |
| 265cc w/ 100% CNC Chamber Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 164 | 236 | 291 | 326 | 330 | 335 | 340 |
| Exh | 135 | 190 | 230 | 258 | 265 | 274 | 280 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.310", intake 3/4" radius plate exhaust, 1 7/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
265cc
|
| Intake Port Dimension |
2.030"H x 1.830"W x1/2 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
132cc
|
| Exhaust Port Dimension |
1.770"H x 2.010" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size (Partial CNC) |
109cc
|
| Combustion Chamber Size (Full CNC) |
112cc
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| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
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| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
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| Minimum Bore Diameter |
4.125"
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| Flat Mill |
.006" per cc/ Maximum 102cc as cast or CNC chamber
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| Angle Mill |
.009" per cc/ Maximum 97cc as cast or CNC chamber
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| Note: Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.640 sq. in.
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| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
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|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
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| Recommended Components: | |
| Intake Port Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) | |
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) | |
| 1.7 Shaft Mount Rocker Arms T&D | |
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold | |
| Suggested Manifold |
Air Gap #7561
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| Spark Plug Starting Range |
Autolite 3924
|
AFR’s new 457cc 18° Big Block Chevy cylinder heads are our best performing highest-flowing heads in our BB Chevy lineup. They come standard with stainless steel 2.400 intake valves and 1.800 exhaust valves.
The intake port is raised .500 with the valves rolled to 18° resulting in unparalleled under the curve flow numbers..... don’t be fooled by just peak flow numbers. The combustion chamber come in at 90cc. This head is ideal for 540CI or larger race engines. This head requires specific pistons, valves covers, shaft mount rockers and readily available intake manifolds. AFR offers a wide range of options and upgrades for this head like titanium valves and Copper seats.
| Basic Package Components | |
| 100% CNC Ported Intake Ports, Exhaust Ports, & Combustion Chamber | |
|
Competition 5-angle Valve Job |
|
| 11/32" Bead Lock Stainless Steel Intake Valve, 2.400" X 6.035" O.A.L. 50° Seat | |
| 11/32" Bead Lock Stainless Steel Exhaust Valve, 1.800" X 5.935" O.A.L. 55° Seat | |
| PAC Racing #1258 1.645” OD Solid Roller Triple Spring, 350 lbs. on seat, .950” maximum lift Max RPM 8300 to 8500 | |
| 10° Titanium Retainer 1.500" O.D X1.180"I.D X .765" I.D | |
| 10° 11/32" Bead Lock Valve Keepers with recess lashcaps | |
| 11/32" Viton Valve Seals | |
| Hardened Spring Cup 1.740 O.D X 1.677 I.D X .570 | |
| Intake Valve Seats 2.500" O.D X 2.000" I.D X .375" Deep | |
| Exhaust Valve Seats 1.900" O.D X 1.400" I.D X .375" Deep | |
| 11/32" Bronze Valve Guides .502" O.D X 2.700 O.A.L. | |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L | |
| 457cc BBC | |||||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | .900 | 1.000 | |
| Int | 161 | 254 | 331 | 389 | 439 | 479 | 492 | 495 | 498 |
| Exh | 134 | 201 | 251 | 286 | 305 | 315 | 332 | 337 | 342 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.625", 3/4" intake radius plate, 2 1/8" curved pipe exhaust
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
457cc
|
| Intake Port Dimension |
2.490" H X 1.750" W X 1/2" Radius
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| Intake Port Location |
.500" Raised
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| Exhaust Port Volume |
143cc
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| Exhaust Port Dimension |
1.850"H x 2.090" W
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| Exhaust Port Location |
.450" Raised
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| Combustion Chamber Size |
90cc
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| Valve Cover Bolt Pattern |
Standard
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| Valve Angle |
18°/4° Int, 11°/4° Exh
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| Valve Spring Pocket Diameter |
1.750" O.D
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| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Warning: Do not machine spring pad any deeper | |
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.600"
|
| Flat Mill |
.005" per cc
|
| Angle Mill |
.0066" per cc
|
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.699 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/ Tapered Seat
|
|
CARB Status:This product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only. |
|
| Recommended Components: | |
| Intake Port Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket, Fel Pro #1057 |
Fel Pro #1057
|
| Head Gasket, Cometic C5434 |
Cometic C5434
|
| Head Studs, ARP 135-4305 | |
| 1.8 Shaft Mount Rocker Arms T&D |
#3160
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| 1.8 Shaft Mount Rocker Arms Crower |
|
| 1.8 Shaft Mount Rocker Arms Jesel |
#KPS-441172
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| Suggested Manifold | |
| Suggested Manifold | |
| Spark Plug Starting Range |
Autolite 3932
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| Distributor Standard Deck |
MSD #84697 or #8489
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| Distributor Tall Deck |
MSD #85561 or #8547
|
| Valve Cover | |
| Valve Cover Gasket | |
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Part# 2000