ACT pressure plates feature a special, single diaphragm design to dramatically increase clamp load without the adverse effects of double-diaphragm type clutches. Effective diaphragm designs are used to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure an exclusive four stage, heat treating process for unparalleled performance. The Xtreme pressure plate provides a clamp load increase of 50-120% higher than stock and has a moderate to stiff pedal feel. In addition all Xtreme plates meet SFI Spec 1.1 to ensure safety.