AFR Heads, 3837 AFR BBF 315 Bullitt Heads, 85cc, Hydraulic Roller Springs

The 315cc heads are Air Flow Research largest and best flowing BBF heads! They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, and high quality components throughout with .250 raised exhaust port locations. These heads are best suited for large displacement high RPM Big Block Ford racing engines or radical “Pro Street” style builds. Please note, due to AFR's valve angle and location, custom pistons or notching existing pistons will be required.

100% CNC Ported Combustion Chambers

100% CNC Ported Intake & Exhaust

Competition 5-Angle Valve Job

11/32" Bead Lock Intake Valve 2.300" x 5.250" O.A.L

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

PAC Racing #1940 1.550" OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725" maximum lift Max RPM 6500-6700

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