Chevy BBC 454 1966-00 3/16" Thick Rubber Steel Core Valve Cover Gasket Set Blue these gaskets are made of

these gaskets are made of a cellulose-nirile material for a good seal

laying a strong platform to build on

These combinations start with a reliable Speedmaster 9

Too little oil causes stem and guide wear

Chevy BBC 454 1966-00 3/16" Thick Rubber Steel Core Valve Cover Gasket Set Blue these gaskets are made ofSpeedmaster 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