Information below is referring to fully assembled heads.
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 75cc 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 |
| 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 | 75cc |
| 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. |
