90-06 Mitsubishi 4G63-4G63T DSM / EVO DOHC 16 Valve Spring and Retainer Kit (w/o Valve Locks)

Manley Speed Equipment, Inc. Founded in 1966 by Hank Manley shortly after his graduation from Brown University. His great interest in performance cars and racing was founded in his 312 CID Ford V8 he built and raced on the streets of New Jersey. Shortly thereafter, the development of Manley Performance Products began, now valves, pistons, lifters, push rods and valve springs began to be manufactured.

Since this beginning, Manley has become one of the world's largest and leading players in engine parts. You will find them all over the world, both on street cars and in the absolute highest racing series. Manley also manufactures OEM parts, which you will therefore find in our standard car models. That trust guarantees quality!