Advanced Clutch HD/Race Sprung 4 Pad Kit AT3-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. Notes: Must use with ACT flywheel (included in kit). Pressure plate bolts included (M8-1.25 x 20mm). Features: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle Moderate friction life, extended by ACT’s exclusive diaphragm design Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance Recommended for high horsepower street or race use 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability Specifications: Clutch Master Cylinder Included: No Grease Included: Yes Grade Type: Performance Flywheel Included: Yes Pilot Bushing Included: No Pressure Plate Type: Heavy Duty Release Bearing Included: Yes Clutch Disc Diameter: 9.4 in Clutch Disc Diameter: 240 mm Disc Material: Ceramic Input Spline Quantity: 24 Input Shaft Diameter: 1.031 in Alignment Tool Included: Yes Disc Type Sprung Solid: Sprung Pressure Plate Bolts Included: Yes Clutch Slave Cylinder Included: No Flywheel Bolts Included: Yes Pilot Bearing Included: Yes Product Weight (lbs.): 31.7 Torque Capacity (ft/lbs.): 587 Torque Capacity Over OE: 0.72 References Installation Instructions