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. | |
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 8517 10° titanium retainer is for use with spring AFR 8014 and requires AFR 9005 bead lock keepers.
(1 Piece) or (Set of 16)
AFR 8517 10° titanium retainer is for use with spring AFR 8014 and requires AFR 9005 bead lock keepers.
(1 Piece) or (Set of 16)
AFR's 8014 spring is our badest spring offering, up to .900" max lift and 8500 RPM.
AFR's 8014 spring is our badest spring offering, up to .900" max lift and 8500 RPM.
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 105cc As Cast
|
| Angle Mill |
.009" per cc/Maximum 100cc 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
|
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 105cc As Cast
|
| Angle Mill |
.009" per cc/Maximum 100cc 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 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. | |
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. | |
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. | |
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