The SPEC Super Twin is for street and track use with extreme horsepower and torque (700-1500 ft lbs tq), offering near-stock drivability, tremendous life expectancy, a no shimming/setup bolt-in install and maintenance free operation. With all billet construction, these units are smooth and quiet. Rebuild-able by SPEC or the end user and replacement components. The SPEC Super Twin is constructed of aircraft grade aluminum and high carbon billet steel. Friction is provided by dampened, full-faced carbon graphite, organic, fiber and full metallic options are available. Flywheel and track-spec hardware are included.