ProX Top End Gasket Set BETA 4TProx gaskets are manufactured by high quality factories to ProX specifications to ensure top quality sealing. Precision engineering and the use of first class materials guarantee the quality you demand from a gasket. The gaskets are complementary to our pistons and rods, so we developed a top end gasket kit and complete gasket kit. To ensure superior performance across a wide variety of engine types and sizes, we manufacture our gaskets from a wide