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

AFR 3837
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.
Shipping: FREE continental USA ground shipping on ALL AFR Cylinder Heads
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Sale: $3,279.63
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Description

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.

Basic Package Components 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 #1940 1.550" OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725" maximum lift Max RPM 6500-6700; Uses #8511 Steel Retainer AFR #8002
10° Manley Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D AFR #8511
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

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.

Details

Shipping Information

  • Item Requires Shipping
  • 65.0 lbs.
  • W12.0000” x H12.0000” x L24.0000”
  • Free Basic Shipping
  • This item ships in its own box.
  • FREE continental USA ground shipping on ALL AFR Cylinder Heads

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