Introducing the NEW Centerforce® SST (Solid Street Twin). The SST clutch system has been engineered and developed for vehicles producing 400 to 925 Feet Per Pound of torque. The SST 10.4 Inch discs utilize solid hubs (possible gear noise) to reduce the rotational weight on the input shaft for quick clean shifts. The discs in this assembly are built using high quality friction materials, for smooth engagement and longevity. The SST features a lightened billet steel flywheel, providing low inertia resulting in quicker RPM and the Centerforce anti-rattle system to reduce floater rattle/noise. No complicated setup or adjustments required, just bolt it in and "Get a Grip". The Centerforce SST features 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 new clutch assembly can be used for everyday use and spirited days on the track.