COMETIC Valve Cover Gaskets are manufactured from a soft durometer rubber wrapped around a steel torque limiting frame. Our valve cover gaskets offer unparalleled sealing and extended reusability. This design surpasses the quality and ability of a typical cork or paper gasket. The rubber and steel combination will withstand blowing out, over tightening, and high amounts of vacuum at an affordable price. Oldsmobile 260-455ci V8 .188" ML Valve Cover Gasket. Each.