SPEC STAGE 2 - Types of Driving: Street, Autocross - For all mild to moderately modified naturally aspirated and power adder engines. (Also good for stock power levels and spririted driving when good daily drivability and extremely long life are the goal.) Stock-like daily drivability and EXCELLENT wear characteristics. High clamp pressure plate, pure Kevlar friction material and high torque sprung hub and disc assembly, bearing and tool kit.

SPEC STAGE 2 PLUS - Types of Driving: Street, Drag, Autocross - For all modified engines making more torque than the stage 2 can support. Maintains stage 2 feel for good daily drivability and offers very good wear characteristics, but provides a higher torque capacity. High clamp pressure plate, composite multi-friction carbon-kevlar material, high torque sprung hub and disc assembly, bearing and tool kit.

SPEC STAGE 3 - Types of Driving: Street, Drag, Drift, Road Race, Rallye, Autocross - For heavily modified street and race engines. Offers sufficient daily drivability with a comfortable pedal feel and quick engagement. Offers good wear characteristics under low and high stress usage. High clamp pressure plate, 6 puck carbon semi-metallic friction with high torque sprung hub and disc assembly, bearing and tool kit.

SPEC STAGE 3+ - Types of Driving: Street, Drag, Drift, Road Race - For heavily modified street and race engines making more torque than the stage3 can support. Offers good daily drivability and better manageability than the stage 3, with even better wear characteristics. High clamp pressure plate, full-faced carbon metallic friction, high torque sprung hub and disc assembly, bearing and tool kit.

SPEC STAGE 4 -Types of Driving: Drag, Drift, Road Race, Rallye, Circle Track - For heavily modified engines or engines of any modification level being used in the above driving environments, where an instantaneous engagement and light weight are beneficial. Not street-friendly due to harsh engagement. High clamp pressure plate, 4 or 6 puck carbon semi-metallic friction with high torque rigid hub and carrier assembly, bearing and tool kit.