Chevy SBC 350 1955-85 Rubber w/Steel Core Valve Cover Gasket Set - Black They feature greater strength and

They feature greater strength and durability

They're available in both dual quad and single quad styles

They feature very precise valve operation

Made from 4340 round bar to exact tolerances

Nitrous/injector bosses

Chevy SBC 350 1955-85 Rubber w/Steel Core Valve Cover Gasket Set - Black They feature greater strength andSpeedmaster 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