United Engine and Machine Company is a piston manufacturer with over 75 years of experience in the automotive industry. We use our experience and new technologies to supply top quality pistons for both stock and performance applications. United Engine and Machine currently produces three distinct piston lines; Silv-O-Lite original equipment replacement pistons, KB Performance Pistons for ...

The NATC proving ground is an independent automotive testing facility. NATC also performs advanced engineering services.