The CALMINI camshaft improves horsepower and torque from 2200 - 5500 rpm. Improved torque helps quicken acceleration. Smooth idle makes for improved on and off--road drivability. Maximum horsepower is obtained with the addition of the CALMINI header and increased air and fuel flow through improved carburetion. A must have for the Samurai that is off-roaded. Kit comes complete with new camshaft and timing and set-up instructions.