We offer the oil pressure relief valve gasket in an upgraded COPPER material. Coppers soft nature helps it to seal better, and it is completely reusable. These are designed to replace and upgrade the original fiber type gasket, sold as Chrysler part number 618 622. These are also supplied new on most high dollar racing aluminum type pumps such as Milodon, etc. Shown as item #11 (circled in red) in the parts diagram.