- Engines & Components
- Cylinder Heads
- AFR Big Block Chevy 315cc Rectangle Port Magnum Aluminum Cylinder Heads
AFR's 315cc Intake Port Torque Monster!
This may be one of the smaller big block Chevy rectangle port intake volume runners in AFR's line-up, but don't let size fool you. This fully ported 315cc cylinder head features a fully CNC'd combusion chamber that will provide you with flow numbers most medium sized cylinder heads (and some larger) can only dream about. This line was designed to optimize low and mid-lift airflow, while still generating impressive peak figures. The application should be focused on smaller cubic inch Big Blocks (396-502ci), with a primary operating range of 2500-6800 rpm's (this range is an average and will vary with engine displacement as well as component selection).
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These heads should also be given strong consideration in larger street driven or marine applications up to 555ci, where low rpm power and drivability are a factor. AFR 315cc cylinder heads would be a great choice if your looking for big torque, strong low rpm performance, and still have good rpm capabilities. The 315cc comes standard with AFR's trademark .750'' thick head deck, reinforced rocker stud bosses, and are equipped with premium one-piece stainless steel 2.250'' intake valves and 1.880'' exhaust valves. Standard combustion chamber volume is 117cc's on the 305cc partially ported heads. Take note the higher flowing exhaust ports and bolt pattern are raised .375 (3/8'') over stock location, this rarely affects header or chassis fitment. .
Installation Notes: Optional stud girdle required for 2° rolled valve angles and 1'' longer head bolt needed on four bottom exhaust bolt holes. Longer pushrods may also be required.
315cc Rectangle Port Magnum Cylinder Head Features:
- 100% CNC Ported Combustion Chambers
- 100% CNC Ported Exhaust Ports
- 100% CNC Ported Intake Ports
- Competition 5-angle Valve Job
- 315cc Intake Ports
- Intake Valve, 2.250'' x 5.500'' Overall Valve Length
- Exhaust Valve, 1.880'' x 5.448'' Overall Valve Length
- 1.625'' OD PAC Racing Solid Roller Valve Spring, 275 lbs on seat, .850'' maximum lift
- 10° Manley 4140 Chrome Moly Retainers
- 10° Valve Locks
- 7/16'' Rocker Studs
- Adjustable 3/8'' Guide Plates
- Viton Valve Seals
- Hardened Spring Seats
- Intake Valve Seats
- Exhaust Valve Seats
- Bronze Valve Guides
