AFR 24° BBC Cylinder Head 290cc Oval Port Fully CNC Ported, 112cc Chambers, Competition Package, Assembled w/Solid Roller Springs

The AFR 290cc BBC Oval Port Cylinder Head is the perfect solution for moderate street or street/strip big block Chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. Featuring 100% CNC-machined intake runners, exhaust ports, and combustion chambers, this head is capable of flowing an impressive 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" O.A.L (AFR #7630)
PAC Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 220 lbs. on seat, .710” max lift (AFR #8000)
PAC Racing #1940 1.550” OD Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725” max lift (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)