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 with .250 or .625 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.
 

Included Components
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

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 1.168" I.D x .844" I.D

AFR #8518

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° 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

ARP 7/16" Rocker Studs

AFR #6407

Adjustable 3/8" Guide Plates

AFR #6108

11/32" Viton Valve Seals

AFR #6613

Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D

AFR #8048

Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep

AFR #9065

Exhaust Valve Seat 1.900" O.D. x 1.400" I.D. x .375" Deep

AFR #9066

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

AFR #9042

 

315cc Street Head Flow Chart
  .200 .300 .400 .500 .600 .650 .700 .750
Int 162 244 305 355 394 405 414 419
Exh 124 166 212 248 267 272 276 276

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