The Modern Silicone TechnologiesMagnum Gaskets range includes head gaskets, head sets, head bolts valve cover, oil pan and manifold gaskets. These gaskets come designed, manufactured and packaged in the USA. Gasket coverage includes Dodge/Ram/Cummins, Ford Powerstroke, GM Duramax, Navistar DT466, Cat C7 & C9, Detroit Diesel Series 60 and Cummins ISX.