AFR 315cc Bullitt Big Block Ford Cylinder Heads 85cc, Raised Exhaust, Solid Roller Springs

The 315cc heads are AFR's largest and best flowing BBF heads! They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, and high quality components throughout. These heads are best suited for large displacement high RPM Big Block Ford racing engines or radical "Pro Street" style builds. Component upgrades and machining options are available to customize AFR Heads to your specific build.

Due to AFR's revised valve location and angle, application specific AFR pistons or fly cutting your current pistons will be required.






AFR's 315cc 14 degree aluminum cylinder heads have 2.300" intake
valves and 1.760" exhaust valves that move tremendous volumes of air
through conservative runner volumes, spelling big torque and
horsepower numbers. With combustion chamber volumes of 85cc (Milling
from 75-83cc possible for $250) accompanied by 142cc exhaust ports
(raised .250"), AFR's new 300cc is the ultimate choice for large
displacement racing engines operating at high RPM. AFR's trademark
3/4" thick cylinder head deck makes them ideal for heavy nitrous or
blower applications. These heads have the 1.550" OD Hydraulic Roller
Valve Springs, .725" maximum lift for high RPM's.



Notes:

Due to AFR's revised valve location and angle, application specific
AFR pistons or fly cutting your current pistons will be required.

color="#ffffff" size="4">Basic Package Components	color="#ffffff" size="4">Part #
100% CNC Ported Combustion Chambers 100% CNC Bowl Blend Intake & Exhaust, Intake Gasket Match Competition 5-Angle Valve Job
11/32" Bead Lock Intake Valve 2.300" x 5.250" O.A.L	AFR #7552
11/32" Bead Lock Tulip Exhaust Valve 1.760" x 5.050" O.A.L	AFR #7553
PAC Racing #1224 1.625" OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850" maximum lift, Max RPM 7400-7600 Uses #8518 Steel Retainer & #8046 Spring Cup (upgrades available)	AFR #8031
10° Manley Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D	AFR #8518
10° 11/32" Beadlock Valve Keepers with lashcap recess	AFR #9010
7/16" Rocker Studs Intake	AFR #6407
Adjustable 3/8" Guide Plates	AFR #6108
11/32" Viton Valve Seals	AFR #6610
Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D	AFR #8048
Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep	AFR #9065
Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D	AFR #9066
11/32" Bronze Valve Guides .502" O.D x 2.250" O.A.L	AFR #9048

color="#ffffff" size="4">Specifications, Features, and Optional Supporting Components

Intake Port Gasket	AFR #6893
Exhaust Port Gasket, Fel-Pro #1420	AFR #6891
Head Gasket, 4.500 Bore, Fel-Pro #1018	AFR #6892
Head Studs, ARP# 155-4202 12 Point	AFR #6341
Head Bolt Washers, Manley	AFR #6320
Stud Girdle	AFR #6209
Suggested Manifold	AFR Single Plane, AFR# 4992 or 4993
Spark Plug Starting Range	Autolite 3932
Combustion Chambers	85cc (Milling from 75-83cc possible for $250)
Spring Pocket	1.750" O.D
Valve Angle	14° Intake/8° Exhaust
Minimum Bore Diameter	4.360"
Minimum Cross Sectional Area	3.440 sq. in.

Important:
Do not
port match you intake manifold to any Fel-Pro
gasket as it does not
precisely match AFR heads.

Note: Milling head deck will affect flow numbers.