The Centerforce® SST (Solid Street Twin) clutch system has been engineered and developed for vehicles producing 400 to 925 ft/lbs of torque. The SST 10.4" discs utilize solid hubs to reduce the rotational weigth on the input shaft for quick clean shifts. The discs in this assembly are built using highquality friction materials, for smooth engagement and longevity. The SST features a lightened billet steel flywheel, providing low interia resulting in quicker RPM's and the Centerfoce anti-rattle system to reduce floater rattle/noise. No complicated setup or adjustments required, just bolt it in and "Get a Grip". The Centrforce SST includes a billet steel flywheel, 2 discs, floater plate, pressure plate, pilot bearing, alignment tool, and ARP pressure plate and flywheel hardware. The SSt clutch system is an economical choice for streetcar enthusiasts looking for a complete high-quality twin disc clutch system. This clutch assembly can be used for everyday use and spirited days at the track.