AFR Heads, 3620 BBC AFR 265 Oval Port Heads, 109cc, Solid Roller Springs

Air Flow Research 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.

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

11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length

PAC Racing Spring 1.550 O.D. Solid Roller Valve Spring, 220lbs on seat, ..710" Maximum Lift, Max RPM 7200-7400

Manley 10° 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

Adjustable 3/8" Guide Plates

11/32" Viton Valve Seals

Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D

Intake Valve Seats 2.450" O.D x 1.950" 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