Chevy BBC 454 1966-00 3/16" Thick Rubber Steel Core Valve Cover Gasket Set Blue To ensure optimal performance

To ensure optimal performance

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

Speedmaster one piece silicone rear main seal

most notably the cylinder heads

Made from heavy duty laser cut steel and a welded rig

Chevy BBC 454 1966-00 3/16" Thick Rubber Steel Core Valve Cover Gasket Set Blue To ensure optimal performanceSpeedmaster valve cover gaskets are manufactured from high quality rubber, which is molded over and vulcanized to a rigid steel frame. They won't leak, blow out, or get sucked in, the way stock or inferior quality aftermarket gaskets can. These gaskets feature superior quality rubber and steel, which outlast cork and rubber composite designs to provide years of dependable service, especially if you frequently have to remove and reinstall the valve