Transtar highlights a new line of Superior Transmissions pump components that fit all variations of GM 6L45/6L50 and 6L80/6L90 units. According to the company, these can be installed in conjunction with the STL012 pump upgrade kit or any O.E. Main Pressure Regulator valve, as well as all aftermarket P.R. valve repair kits, including oversized internal P.R. Valve types.