ACT Heavy Duty Sprung 4 Puck Clutch Kit Mazdaspeed 3 6 (06 11) (ZX4 HDG4). 2006 2011 Mazdaspeed 3 6 HD 4 Puck Sprung Clutch Kit by ACT ZX4 HDG4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four stage, heat treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4 pad spring centered race disc features a spring center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. With the 4 pad spring centered race disc, engagement is harsher, but shifting is faster. ACT's 4 pad spring centered race disc is well suited for smaller disc sizes in smaller engines. Features Product Weight (lbs.): 30 Torque Capacity (ft lbs.): 574 Torque Capacity Over OE: 93% Disc Material: Ceramic Clutch Disc Diameter (Inches): 9. 4 Clutch Disc Diameter (Millimeters): 240 Input Shaft Diameter (inches): 1 Pressure Plate Type: Heavy Duty Flywheel Type: Prolite Benefits Improved Clutch Performance and Feel Applications 2006 2011 Mazdaspeed 3 6 What's In The Box? 1 HD Clutch Kit Warranty ACT's Standard 1 Year Limited Warranty