GSC Power-Division billet S2 Cams for the Gen 3 3SGTE MR2 Turbo, with shim under bucket valve train. Designed to support over 850 WHP. This cam is for a serious engine: big turbo, built motor, built/ported head, and engine management. You will notice better spool characteristics, and more horsepower and torque in the mid and top end of the revs.