Chevy BBC 454 360cc 115cc Aluminum Bare Cylinder Head These manifolds require a universal

These manifolds require a universal 4-barrel throttle body

Speedmaster water pumps have a bigger impeller and larger cavity size to flow 40 percent more coolant than stock

Speedmaster valve locks are designed for stock or performance engines using 7 degree valve locks

They are manufactured from brass and include thread-in brass jet extensions (where noted)

These Speedmaster vacuum advance covers are designed to fit over the stock vacuum advance canister

Chevy BBC 454 360cc 115cc Aluminum Bare Cylinder Head These manifolds require a universalAs 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