• Steel 10 degree Retainer 1.550 O.D.
• Comes standard on BBC, SBC, BBF, & SBF with spring 8000, 8002, 8005, 8016, & 8023
• SBC/SBF require AFR #9009 Bead Lock Keepers
• BBC require AFR #9005 Square Lock Keepers
• BBF require AFR #9010 Bead Lock Keepers
• (1 Piece) or (Set of 16)

• Titanium 10 degree Retainer 1.500 O.D.
• Upgrade option for BBC, SBC, BBF, & SBF with spring 8000, 8002, 8005, 8016, & 8023
• Comes standard on BBC, SBC, BBF, & SBF with spring 8001
• SBC/SBF require AFR #9009 Bead Lock Keepers
• BBC require AFR #9005 Square Lock Keepers
• BBF require AFR #9010 Bead Lock Keepers
• (1 Piece) or (Set of 16)

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	AFR #7620
11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length	AFR #7630
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)	AFR #8000
PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700	AFR #8002
10° Steel Retainers 1.500" O.D x 1.120"I.D x .705" I.D	AFR #8511
10° 11/32" Valve Keepers with lashcap recess	AFR #9005
ARP 7/16" Rocker Studs Intake	AFR #6407
ARP 7/16" Rocker Studs Exhaust	AFR #6406
Adjustable 3/8" Guide Plates	AFR #6109
11/32" Viton Valve Seals	AFR #6613
Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D - For 8000 Spring	AFR #8048
Hardened Valve Spring I.D Locator 1.655" O.D x 1.565" I.D – For 8002 Spring	AFR#8044
Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep	AFR #9065
Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep	AFR #9064
11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L	AFR #9041
11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L	AFR #9042

 

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	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	AFR #6858
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)	AFR #6202
7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry)	AFR #6043
1.7 Shaft Mount Rocker Arms T&D	AFR #6065
Shaft Mount Rocker Arms	Crower or Jesel Pro Series
Suggested Manifold	Victor Jr
Suggested Manifold	RPM Performer
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	AFR #7626
11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length	AFR #7630
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)	AFR #8031
10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D	AFR #8518
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	AFR #8002
10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D	AFR #8511
10° 11/32" Valve Keepers with lashcap recess	AFR #9005
ARP 7/16" Rocker Studs Intake	AFR #6407
ARP 7/16" Rocker Studs Exhaust	AFR #6406
Adjustable 3/8" Guide Plates	AFR #6109
11/32" Viton Valve Seals	AFR #6613
Hardened Spring Cup 1.740” O.D / 1.650” I.D	AFR #8046
Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep	AFR #9065
Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep	AFR #9064
11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L	AFR #9041
11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L	AFR #9042

 

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
Intake Port Volume	300cc
Intake Port Dimension	2.055"H x 1.840"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	3.020 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	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	AFR #6858
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)	AFR #6202
7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry)	AFR #6043
1.7 Shaft Mount Rocker Arms T&D	AFR #6065
Shaft Mount Rocker Arms	Crower or Jesel Pro Series
Suggested Manifold	Victor Jr
Suggested Manifold	RPM Performer
Suggested Manifold	Air Gap #7561
Spark Plug Starting Range	Autolite 3924
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	AFR #7601
11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length	AFR #7630
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)	AFR #8000
PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” maximum lift, Max RPM 6500-6700	AFR #8002
10° Steel Retainers 1.500" O.D x 1.120"I.D x .705" I.D	AFR #8511
10° 11/32" Valve Keepers with lashcap recess	AFR #9005
ARP 7/16" Rocker Studs Intake	AFR #6407
ARP 7/16" Rocker Studs Exhaust	AFR #6406
Adjustable 3/8" Guide Plates	AFR #6109
11/32" Viton Valve Seals	AFR #6613
Hardened Valve Spring Cup 1.655" O.D x 1.565" I.D – For 8002 Spring	AFR#8044
Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D - For 8000 Spring	AFR #8048
Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep	AFR #9065
Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep	AFR #9064
11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L	AFR #9041
11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L	AFR #9042

 

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
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	4.125"
Flat Mill	.006" per cc/ Maximum 102cc as cast or CNC chamber
Angle Mill	.009" per cc/ Maximum 97cc as cast or CNC chamber
Note: Angle mills might require a .120" Thick intake gasket.
Minimum Cross Sectional Area	2.640 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 #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	AFR #6858
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)	AFR #6202
7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry)	AFR #6043
1.7 Shaft Mount Rocker Arms T&D	AFR #6065
Shaft Mount Rocker Arms	Crower or Jesel Pro Series
Suggested Manifold	Victor Jr
Suggested Manifold	RPM Performer
Suggested Manifold	Air Gap #7561
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	AFR #7420
11/32" Bead Lock Stainless Steel Exhaust Valve, 1.800" X 5.935" O.A.L. 55° Seat	AFR #7422
PAC Racing #1258 1.645” OD Solid Roller Triple Spring, 350 lbs. on seat, .950” maximum lift Max RPM 8300 to 8500	AFR #8014
10° Titanium Retainer 1.500" O.D X1.180"I.D X .765" I.D	AFR #8517
10° 11/32" Bead Lock Valve Keepers with recess lashcaps	AFR #9010
11/32" Viton Valve Seals	AFR #6613
Hardened Spring Cup 1.740 O.D X 1.677 I.D X .570	AFR #9170
Intake Valve Seats 2.500" O.D X 2.000" I.D X .375" Deep	AFR #9162
Exhaust Valve Seats 1.900" O.D X 1.400" I.D X .375" Deep	AFR #9066
11/32" Bronze Valve Guides .502" O.D X 2.700 O.A.L.	AFR #9055
11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L	AFR #9042

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
Intake Port Location	.500" Raised
Exhaust Port Volume	143cc
Exhaust Port Dimension	1.850"H x 2.090" W
Exhaust Port Location	.450" Raised
Combustion Chamber Size	90cc
Valve Cover Bolt Pattern	Standard
Valve Angle	18°/4° Int, 11°/4° Exh
Valve Spring Pocket Diameter	1.750" 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	4.600"
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	AFR #6880
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 #6858
Head Gasket, Fel Pro #1057	Fel Pro #1057
Head Gasket, Cometic C5434	Cometic C5434
Head Studs, ARP 135-4305	AFR #6345
1.8 Shaft Mount Rocker Arms T&D	#3160
1.8 Shaft Mount Rocker Arms Crower
1.8 Shaft Mount Rocker Arms Jesel	#KPS-441172
Suggested Manifold	10.2” Block AFR #4901
Suggested Manifold	9.8” Block AFR #4902
Spark Plug Starting Range	Autolite 3932
Distributor Standard Deck	MSD #84697 or #8489
Distributor Tall Deck	MSD #85561 or #8547
Valve Cover	AFR #6728
Valve Cover Gasket	AFR #6882

BBC 18° 11/32" 2.400" x 6.035" Overall Length Steel Intake Valve

BBC 18° Spring Cup 1.740" OD x .570" ID x .062" Thick

BBC 18° Ductile Iron 2.500" OD x 2.000" ID x .500" Deep Int Seat

BBC 18° 11/32" ID Bronze Guide  2.700" Overall Length

BBC 18 Degree 11/32" 2.400" x 6.035" Overall Length Steel Intake Valve

BBC 18 Degree 11/32" 1.800" x 5.930" Overall Length Tulip Steel Exhaust Valve

AFR proudly presents the Magnum Intake Manifold, the ultimate power upgrade for your Big Block Chevy engine. Crafted with precision and engineered to perfection, this manifold is the key to unlocking a new level of performance for your street vehicle. Designed to seamlessly integrate with our acclaimed AFR Magnum Oval port cylinder heads, this manifold promises a hassle-free enhancement to your engine’s capabilities.
 
Say goodbye to the painstaking task of port matching, as it is a direct bolt-on solution for our select cylinder heads. The Magnum Intake Manifold utilizes a dual-plane design, featuring runners that are custom-tailored for high-horsepower applications thriving in the 1800-6200 RPM range. Elevate your driving experience today with AFR’s Magnum Intake Manifold – where power meets precision.

*Best fit for AFR Magnum Oval Port 265cc, 290cc, and 300cc cylinder heads. May require porting to match other cylinder heads.

The AFR Magnum Intake Manifold is the ultimate power upgrade for your Big Block Chevy engine. Crafted with precision and engineered to perfection, this manifold is the key to unlocking a new level of performance for your street vehicle. Developed to match the port designs of our popular cylinder heads, this manifold provides an optimized intake tract for increased performance. These As-Cast pieces were modeled using our rectangular ports and provide guaranteed fitment out of the box. 
 
Say goodbye to the painstaking task of port matching, as it is a direct bolt-on solution for our select cylinder heads. Perfect for street and marine applications with an RPM range up to 6,500 RPM. Features include unmachined port nitrous bosses, 2 distributor clamp locations and mutliple front and rear coolant bosses. Elevate your driving experience today with AFR’s Magnum Intake Manifold – where power meets precision.

May require porting to match other cylinder heads.

Designed for use with AFR's 18° Magnum Race Head, this 18° manifold is capable of 3000+ horsepower.  As seen on Dennis Taylor/Alex Taylor's Quest for the Sixes' in their 1955 Chevy 210.

• AFR Single Piece Guide Plates
• BBC Enforcer
• (1 Piece) or (Set of 8)

StL 10 Deg Retainer - 1.500 OD
SBC & SBF BBC/BBF LSx Mopar Spring Retainer Lock Seat/Cup Retainer Lock Seat/Cup Retainer Lock Seat/Cup Retainer Lock Seat/Cup 8000 8511/8505 9009 8048 8511/8505 9005 8044 8001 8505 9009 8048 8505 9005 8044 8002 8511/8505 9009 8045 8511/8505 9005 8044 8005 8511/8505 9005 8044 8014 8517 9005 8016 8511/8505 9009 8045 8511/8505 9005 8044 8017 8514/8515 9007 8042 8512 9007 8042 8520/8521 9009 8042 8019 8514/8515 9007 8042 8512 9007 8042 8520/8521 9009 8042 8020 8510 9009 8043 8022 8507 9005 8046 8023 8511/8505 9009 8511/8505 9005 8046 8031 8518/8507 9005 8046

short description 

BBC 18° 11/32" ID Bronze Guide  2.700" Overall Length