Chevy BBC 454 1966-00 3/16" Thick Rubber Steel Core Valve Cover Gasket Set Black The internal components are made

The internal components are made from EN36 Material as used in racing

while delivering increased engine vacuum

These can be used on std or aftermarket plenum manifolds

with the performance and durability required to reach the winner's circle

Chevy BBC 454 1966-00 3/16" Thick Rubber Steel Core Valve Cover Gasket Set Black The internal components are madeSpeedmaster 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