Use the proper gaskets and seal reseal the engine in your 1999-2003 Ford 7.3L Powerstroke. Shop today and get head gaskets, rear main seals, complete engine gasket sets, oil pan gaskets, and more. Using quality gaskets is crucial when it comes to service and repair on your engine. Get the important gaskets your engine needs from major brands like MAHLE, Interstate-McBee, Cometic, Alliant, and factory replacement brands like GM, Ford Motorcraft, and Cummins.