Our 235cc "Competition" heads come with 100% CNC machined intake runners, exhaust ports and combustion chambers. Equipped with Titanium retainers and high quality components, featuring a 60/40 valve spacing which requires  shaft mounted rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications).
 

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.125" x 5.00" long O.A.L.	AFR #7253
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" long O.A.L.	AFR #7254
PAC Racing Springs 1.550" OD Solid Roller Dual Drag Race Spring, 250 lbs on seat, .800" maximum lift, Max RPM 8000-8200	AFR #8001
10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D	AFR #8505
10° Bead Lock Valve Keepers with lashcap recess	AFR #9009
ARP 7/16" Rocker Studs	AFR #6405
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring I.D Locator 1.550” O.D x .780” I.D	AFR #8048
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

 

235cc Competition Flow Chart
	.200	.300	.400	.500	.550	.600	.650	.700	.800
Int	159	221	261	295	311	318	327	331	336
Exh	120	165	214	228	237	238	243	245	250

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", intake 3/4" radius plate exhaust, 1 7/8" curved pipe

Specifications & Features:
Material	A356 Aluminum
Intake Port Volume	235cc
Intake Port Dimension	2.200" H x 1.290" W 5/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	80cc
Exhaust Port Dimension	1.430" H x 1.540" W
Exhaust Port Location	.250" Raised
Combustion Chamber Size	70cc or 80cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.580" O.D
Max Valve Spring Pocket Machining	1.680" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 65cc Maximum
Angle Mill	.009" per cc 60cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	2.470 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:
1.5 T&D Shaft Mount w/ .450" off-set	AFR #6062
1.6 T&D Shaft Mount w/ .450" off-set	AFR #6063
1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset	AFR #6036
1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset	AFR #6035
Intake Gasket	AFR #6901
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	AFR #6905
Head Gasket, 350cid Fel-Pro #1004	AFR #6801
Head Gasket, 400cid Fel-Pro #1014	AFR #6802
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
Stud Girdle AFR Offset	AFR #6208
Suggested Manifold	AFR #4811
Suggested Manifold	AFR #4810
Spark Plug Starting Range	Autolite 3922

 

Our largest and most powerful 60/40 head for the small block Chevy features 100% CNC machined intake runners, exhaust ports and  combustion chambers. Capable of flowing 350 CFM at 0.800" of lift these heads come equipped with Titanium retainers and high quality components throughout, the 60/40 valve spacing which requires shaft mounted rocker arms for optimum valve train geometry and extra machining for 3/8" pushrod clearance. NPP stands for "no pushrod pinch."
 

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.125" x 5.000" Overall Valve Length	AFR #7253
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length	AFR #7254
PAC #1225 Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 250 lbs. on seat, .800” max lift, Max RPM 8000-8200	AFR #8001
10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D	AFR #8505
10° Bead Lock Valve Keepers with lashcap recess	AFR #9009
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring I.D Locator 1.550” O.D x .780” I.D	AFR #8048
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

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.

245cc Competition Flow Chart
	.200	.300	.400	.500	.550	.600	.650	.700	.800
Int	161	224	261	301	311	320	331	337	345
Exh	128	165	214	228	237	238	243	245	250

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", intake 3/4" radius plate exhaust, 1 7/8" curved pipe

 

Specifications & Features:
Material	A356 Aluminum
Intake Port Volume	245cc
Intake Port Dimension	2.200" H x 1.300" W 7/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	80cc
Exhaust Port Dimension	1.465" H x 1.570" W
Exhaust Port Location	.250" Raised
Combustion Chamber Size	70cc or 80cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.580" O.D
Max Valve Spring Pocket Machining	1.680" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 65cc Maximum
Angle Mill	.009" per cc 60cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	2.730 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:
1.5 T&D Shaft Mount w/ .450" off-set (requires .180 offset lifters)	AFR #6062
1.6 T&D Shaft Mount w/ .450" off-set (requires .180 offset lifters)	AFR #6063
1.6 T&D Shaft Mount w/ .550" off-set	AFR #6064
Intake Gasket	AFR #6901
Exhaust Port Gasket	AFR #6905
Head Gasket, 350cid Fel-Pro #1004	AFR #6801
Head Gasket, 400cid Fel-Pro #1014	AFR #6802
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
Suggested Manifold	AFR #4811
Suggested Manifold	AFR #4810
Spark Plug Starting Range	Autolite 3922

 

AFR's 190cc Vortec Street heads are the preferred choice over reworked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street/strip engines from 350-383 cubic inches, operating up to 6000 RPM. Not compatible with self-aligning rocker arms.
 

Included Components
100% CNC Ported Combustion Chambers
90% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length	AFR #7251
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length	AFR #7250
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500, less than 235* duration, upgraded spring #8019 recommended for higher RPM & larger cams	AFR #8017
7° Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D	AFR #8514
7° Bead Lock Valve Keepers	AFR #9007
ARP 3/8" Rocker Studs	AFR #6409
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D	AFR #8042
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

 

190cc Street Head Flow Chart
	.200	.300	.400	.500	.550
Int	135	213	253	276	279
Exh	110	158	190	207	211

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe

Specifications & Features:
Material	A356 Aluminum
Intake Port Volume	190cc
Intake Port Dimension	2.320" H x 1.297" W x 3/8° Radius
Intake Port Location	Stock
Exhaust Port Volume	64cc
Exhaust Port Dimension	1.450" H x 1.550" W
Exhaust Port Location	.100" Raised
Combustion Chamber Size	65cc
Valve Cover Bolt Pattern	Center & Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.460" O.D
Max Valve Spring Pocket Machining	1.750" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	2.070 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	GM Vortec or Fel-Pro #12895 (.120 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	AFR #6905
Head Gasket, 350cid Fel-Pro #1003	AFR #6800
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
AFR Stud Girdle	AFR #6200
Suggested Manifold	GM or Aftermarket Vortec
Spark Plug Starting Range	Autolite 3924

AFR’s 180cc “Street” heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Legal for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. Component upgrade and machining options are available to customize AFR Heads to your specific build (see pg. 45). To ensure trouble free operation of AFR cylinder heads & parts please view the footnotes on pg. 50 for additional information.

Included Components
90% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-Angle Valve Job
8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length	AFR #7251
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length	AFR #7250
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500	AFR #8017
7° Manley Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D	AFR #8514
7° Bead Lock Valve Keepers	AFR #9007
ARP 3/8" Rocker Studs	AFR #6409
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D	AFR #8042
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

180cc Street Head Flow Chart
	.200	.300	.400	.500
Int	138	198	240	260
Exh	110	158	190	207

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	180cc
Intake Port Dimension	2.050" H x 1.250" W x 5/16° Radius
Intake Port Location	Stock
Exhaust Port Volume	64cc
Exhaust Port Dimension	1.450" H x 1.550" W
Exhaust Port Location	.100" Raised
Combustion Chamber Size	65cc or 75cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.460" O.D
Max Valve Spring Pocket Machining	1.750" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Note: Angle mills might require .120 thick intake gasket.
Minimum Cross Sectional Area	1.810 sq. in.
Spark Plug Dimensions	14mm x .750" w/Gasket Seat

Recommended Components:
Intake Gasket	GM #12524653 LT1 or Fel-Pro #1284
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, Fel-Pro #1404	AFR #6834
Head Gasket, 350cid Fel-Pro #1003	AFR #6803
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
AFR Stud Girdle	AFR #6200
Suggested Manifold	GM LT1 or LT4
Spark Plug Starting Range	Autolite 3924

AFR's 195cc "Street" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. AFR heads are available bare (without parts), call our tech line for details.
Exhaust ports and bolt location are the same as Gen 1 SBC. Please be aware your OE LT exhaust manifolds might not fit perfectly.
Please see footnotes for additional information.

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.050" x 4.900" Overall Valve Length	AFR #7252
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length	AFR #7250
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500(upgrades available)	AFR #8017
7° Manley Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D	AFR #8514
7° Bead Lock Valve Keepers	AFR #9007
ARP 3/8" Rocker Studs	AFR #6409
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D	AFR #8042
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

195cc Street Head Flow Chart
	.200	.300	.400	.500	.550
Int	146	201	247	275	280
Exh	119	166	197	213	218

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe

195cc Aluminum SBC Street Cylinder Heads
Part #	Plug Type	Combustion Chamber
1031	GM LT1	65cc
1032	GM LT1	54cc

Recommended Components:
Intake Gasket	GM #12524653 LT1 or Fel-Pro #1284
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, Fel-Pro #1404	AFR #6834
Head Gasket, LT1 Fel-Pro #1074	AFR #6803
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
AFR Stud Girdle	AFR #6200
Suggested Manifold	GM LT1 or LT4
Spark Plug Starting Range	Autolite 3924

Specifications & Features:
Material	A356 Aluminum
Intake Port Volume	195cc
Intake Port Dimension	2.110" H x 1.265" W 5/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	64cc
Exhaust Port Dimension	1.450" H x 1.550" W
Exhaust Port Location	.100" Raised
Combustion Chamber Size	65cc or 75cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.460" O.D
Max Valve Spring Pocket Machining	1.750" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	1.905 sq. in.
Spark Plug Dimensions	14mm x .750" w/Gasket Seat

 

AFR`s 195cc "Competition" heads are the preferred choice for a more aggressive street or street/strip build. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500-6800 RPM. Legal for 1994 and older emissions controlled vehicles under CARB EO #D-250-2.

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.080" x 4.900" Overall Valve Length	AFR #7259
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length	AFR #7250
PAC Racing Spring 1.270" OD Hydraulic Dual Valve Spring, 155 lbs. on seat, .650" maximum lift, Max RPM 7000-7200	AFR #8019
7° Manley Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D	AFR #8514
7° Bead Lock Valve Keepers	AFR #9007
ARP 7/16" Rocker Studs	AFR #6405
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D	AFR #8042
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

 

195cc Competition Head Flow Chart
	.200	.300	.400	.500	.550	.600
Int	151	211	260	293	304	308
Exh	125	172	207	224	229	233

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	195cc
Intake Port Dimension	2.185" H x 1.265" W 5/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	64cc
Exhaust Port Dimension	1.460" H x 1.565" W
Exhaust Port Location	.100" Raised
Combustion Chamber Size	65cc or 75cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.460" O.D
Max Valve Spring Pocket Machining	1.750" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	1.920 sq. in.
Spark Plug Dimensions	14mm x .750" w/Gasket Seat

Recommended Components:
Intake Gasket	AFR #6860
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, Fel-Pro #1404	AFR #6834
Head Gasket, LT1 Fel-Pro #1074	AFR #6803
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
AFR Stud Girdle	AFR #6200
Suggested Manifold	GM LT4 or Edelbrock LT4
Spark Plug Starting Range	Autolite 3924

AFR’s 210cc “Competition” LT4 heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street/strip builds up to 400 cubic inches, operating up to 6500-6800 RPM. Component upgrade and machining options are available to customize AFR Heads to your specific build (please call for all available options). To ensure trouble free operation of AFR cylinder heads & parts please view the footnotes for additional information. AFR heads are available bare (without parts), call our tech line for details.

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.080" x 5.000" Overall Valve Length	AFR #7255
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length	AFR #7254
PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400	AFR #8000
Manley 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D	AFR #8511
10° Bead Lock Valve Keepers	AFR #9009
ARP 7/16" Rocker Studs	AFR #6405
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D	AFR #8048
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

210cc Race Ready Head Flow Chart
	.200	.300	.400	.500	.550	.600	.650
Int	145	199	248	285	301	309	311
Exh	110	158	192	210	214	220	222
210cc Competition Head Flow Chart
	.200	.300	.400	.500	.550	.600	.650
Int	147	201	257	296	310	318	322
Exh	120	160	214	225	229	235	237

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	210cc
Intake Port Dimension	2.200" H x 1.310" W x 3/8 Radius
Intake Port Location	Stock
Exhaust Port Volume	80cc
Exhaust Port Dimension	1.420" H x 1.545" W
Exhaust Port Location	.250" Raised
Combustion Chamber Size	65cc or 75cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.580" O.D
Max Valve Spring Pocket Machining	1.750" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	Race Ready: 2.100 sp in, Comp 2.115 sq. in
Spark Plug Dimensions	14mm x .750" w/Gasket Seat
Carb EO#	Not Emissions Complient

Recommended Components:
Intake Gasket	AFR #6860
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, Fel-Pro #1405	AFR #6835
Head Gasket, LT1 Fel-Pro #1074	AFR #6803
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
AFR Stud Girdle	AFR #6200
Suggested Manifold	GM LT4 or Edelbrock LT4
Spark Plug Starting Range	Autolite 3922

AFR's 227cc "Race Ready" and "Competition" LT4 heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications).
 

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.100" x 5.000" Overall Valve Length	AFR #7256
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length	AFR #7254
PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400	AFR #8000
Manley 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D	AFR #8511
10° Bead Lock Valve Keepers with lashcap recess	AFR #9009
ARP 7/16" Rocker Studs	AFR #6405
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D	AFR #8048
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

 

227cc Race Ready Head Flow Chart
	.200	.300	.400	.500	.550	.600	.650	.700
Int	148	210	261	296	304	312	315	318
Exh	114	155	204	220	225	229	233	237

227cc Competition Head Flow Chart
	.200	.300	.400	.500	.550	.600	.650	.700	.750
Int	152	212	265	300	312	319	324	327	329
Exh	120	167	214	230	234	238	241	243	245

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.155", 3/4" radius plate exhaust, 1 7/8" curved pipe

Specifications & Features:
Material	A356 Aluminum
Intake Port Volume	227cc
Intake Port Dimension	2.200" H x 1.290" W 5/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	80cc
Exhaust Port Dimension	1.430" H x 1.540" W
Exhaust Port Location	.250" Raised
Combustion Chamber Size	65cc or 75cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23°
Valve Spring Pocket Diameter	1.580" O.D
Max Valve Spring Pocket Machining	1.680" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area	2.340 sq. in.
Spark Plug Dimensions	14mm x .750" w/Gasket Seat
Carb EO#	Non Emissions Compliant

Recommended Components:
1.5 T&D Shaft Mount w/ .450" off-set	AFR #6062
1.6 T&D Shaft Mount w/ .450" off-set	AFR #6063
1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset	AFR #6036
1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset	AFR #6035
Intake Gasket	AFR #6860
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, Fel-Pro #1405	AFR #6835
Head Gasket, LT1 Fel-Pro #1074	AFR #6803
SB Chevy Head Bolt Kit, ARP #134-3701	AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301	AFR #6305
Head Bolt Washers, Manley	AFR #6320
Stud Girdle AFR Offset	AFR #6208
Suggested Manifold	GM LT4 or Edelbrock LT4
Spark Plug Starting Range	Autolite 3922

AFR’s NEW Enforcer Series Top End Kits are perfect for customers looking for the ultimate bolt-on power upgrade for their small block chevy engine. We have created a package that leaves the guesswork behind, using premium AFR components you can trust. Our SBC Enforcer series kit is available in straight or angled spark plug styles using our Enforcer Series 195cc cylinder heads and paired with our low-profile Enforcer dual plane intake manifold. Order one of these AFR top end kits today and put your engine on track for some serious horsepower.

AFR is proud to reintroduce our Slinger Speedway Limited Late Model engine approved cylinder head. This cylinder head features a 100% CNC ported intake, exhaust and combustion chambers, 5 angle AFR valve job, A356 aluminum castings and high-quality components throughout. The AFR/Slinger Cylinder Head will shave roughly 38lbs from the front nose of your vehicle. This cylinder  head must maintain all original manufacturer's specifications. No alterations of any manner permitted. All competitors must pre-register the AFR heads with Slinger Speedway tech officials. Minimum combustion chamber 62cc, maximum 2.08” intake and 1.6” exhaust valves both with minimum stem diameter of 5/16”. Valve spring retainers are the only titanium parts allowed.

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.080" x 5.000" Overall Valve Length	AFR #7255
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length	AFR #7254
PAC Racing Spring 1.550" OD Solid Flat Tappet Dual Valve Spring, 140 lbs. on seat, .600" maximum lift, Max RPM 7200-7400	AFR #8016
10° Titanium Retainers 1.500" O.D x 1.120" I.D x 0.750" I.D	AFR #8505
10° Bead Lock Valve Keepers	AFR #9009
ARP 7/16" Rocker Studs	AFR #6405
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring I.D Locator 1.550" O.D x 0.730" O.D x 0.570" I.D	AFR #8045
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L	AFR #9051

195cc Competition Head Flow Chart
	.200	.300	.400	.500	.550	.600
Int	151	211	260	293	304	308
Exh	125	172	207	224	229	233

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe