AFR Heads, 3806 AFR BBF 280 Bullitt Heads, 85cc, Solid Roller Springs

Air Flow Resarch new 280cc feature partially CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout with standard exhaust port locations. Recommended for street, towing, or street/strip engines with displacements up to 477 cubic inches, operating up to 6200 RPM. Please note, due to AFR's valve angle and location, custom pistons or notching existing pistons will be required.

50% CNC Ported Combustion Chambers

80% CNC Bowl Blend Intake & Exhaust

Competition 5-Angle Valve Job

11/32" Bead Lock Intake Valve 2.250" x 5.250" O.A.L

11/32" Bead Lock Tulip Exhaust Valve 1.760" x 5.050" O.A.L

PAC Racing Springs 1.550" OD Solid Roller Dual Valve Drag Race Spring 220 lbs. on seat, .680" maximum lift Max RPM 7200-74000

10° Manley Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D

10° 11/32" Beadlock Valve Keepers with lashcap recess

ARP 7/16" Rocker 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 Seat 1.900" O.D. x 1.400" I.D. x .375" Deep

11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L