Tired of breaking the belt on your Whipple supercharged Mustang? Well, those days are over! Steeda's Belt Drive was designed to prevent the belt breakage. The 10-rib belt on this system drives the supercharger and nothing else, leaving it free to build 13 psi without slipping (boost varies on application). The standard accessories are driven by a Steeda underdrive pulley for even more power.