Chevy BBC 454 360cc 115cc Aluminum Bare Cylinder Head These Speedmaster vacuum advance covers

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

Ensure this never happens with Speedmaster transmission gaskets

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

Note: This item is all missing gaskets

Chevy BBC 454 360cc 115cc Aluminum Bare Cylinder Head These Speedmaster vacuum advance coversAs 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