This assembly, available with a double spring, six rivet carriage is good for ease of gear transition with higher horsepower. This disc complimented by a performance pressure plate provides up to 250% increase in torque capacity. 300 mile break-in recommended with this set-up. The 1620 Series kit includes a performance pressure plate, a six puck high torque sprung disc with Ceramic buttons, all applicable bearings, and the appropriate alignment tool.