Stage 6 Dual Diaphragm Metallic Sprung System Dual diaphragm heavy duty pressure plate Metallic Sprung puck style disc (available with 6 puck grooved, 6 puck, and 4 puck discs) 50% increase in pedal pressure 200-400% increase in holding capacity Aggressive engagement, rapid heat dissipation, and outstanding holding capacity Engineered for dedicated high horsepower race vehicles Includes: Pressure Plate, Clutch Disc, Throwout Bearing, Alignment Tool, and Pilot Bearing (when applicable)