Chevy BBC 454 360cc 115cc Aluminum Bare Cylinder Head Their dual-idler design has CNC-machined

Their dual-idler design has CNC-machined components and they are easy to install

These Speedmaster expansion tanks are perfect for cars with low-mount radiators to provide a convenient filling location and to bleed off unwanted air

power and economy

they have hardened stem tips for durability and are swirl-polished

These headers are designed with 5/16 in

Chevy BBC 454 360cc 115cc Aluminum Bare Cylinder Head Their dual-idler design has CNC-machinedAs 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