The Super Twin is for street and track use in cars with extreme horsepower and torque (700-1500 ft lbs tq). , tremendous life expectancy, a no shimming/setup bolt-in installation and maintenance free operation. With all billet construction, these units are smooth and quiet. The units are rebuild-able by SPEC or the end user and replacement components or rebuild services are always available. The super twin is constructed with aircraft grade aluminum and full-faced carbon graphite discs