Speedmaster CNC Aluminum Cylinder Head Big Block Chevy 454 w/Solid Roller Cam
746-PCE281.2039
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Big Block Chevy - Assembled
Special Note: Camshaft and Lifters Not Included
Assembly Specifications
Max Lift: .650
Coil Bind: .925
Intake Install: 275lbs @ 2.1
Exhaust Install: 275lbs @ 2.1
Closed Seat Pressure: 210lbs
Open Seat Pressure: 450lbs
As with all Speedmaster cylinder heads, our Big Block Chevrolet heads are Gravity Die Cast . This casting process creates a much more uniform and robust cylinder head. With the increasingly large displacements becoming common, the need for more airflow is necessary. If you are looking to build a 400-500+hp engine, give our PCE281.1489 heads a try. They offer a smaller cross - section to increase the incoming air s velocity, resulting in great driveability, power and economy. On engines over 500hp, use the rectangle port PCE281.1488 heads. The mid-size cross section works well on engines under 540cu.in and under 7000RPM. If you are working on a larger, or higher RPM engine, step up to the CNC ported PCE281.1511 heads. The added volume of the PCE281.
Specifications:
Hi ! Can i use this heads on a .125 over / 4.375 bore gen 4 BBC ?
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