This assembly provides up to 80% increase in torque capacity and is properly suited for aggressive street use and moderate track use. The Brass Plus material with its alloy backing matched to a performance pressure plate will provide smooth engagement and extended life. 500 mile break-in highly recommended with this set-up. 300 mile break-in REQUIRED with this set-up. The 2100 Series kit includes a performance pressure plate, a high torque sprung disc with anti-burst steel backed Brass Plus facings, all applicable bearings and the appropriate alignment tool.