• 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

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

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

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

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.

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