Advanced Clutch HD/Race Rigid 4 Pad Kit AT3-HDR4 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 rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the 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, increased gear rattle Moderate friction life, extended by ACT’s exclusive diaphragm design, rigid design may increase spline wear Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance Recommended for race use only 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: Solid Pressure Plate Bolts Included: Yes Clutch Slave Cylinder Included: No Flywheel Bolts Included: Yes Pilot Bearing Included: Yes Product Weight (lbs.): 29.8 Torque Capacity (ft/lbs.): 587 Torque Capacity Over OE: 0.72 References Installation Instructions