Mr. Gasket Cam Bushing Kits let you either advance the cam for more midrange power and low-end torque or retard it to reduce excessive low-end torque and increase top-end power. Compatible with big-block and small-block Chevys and big-block Mopars, these sets include four offset bushings (2 degrees, 4 degrees, 6 degrees, and 8 degrees) and a zero-degree bushing that restores stock timing.