GM015S uses 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. ACTs Sport pressure plates increase clamp load by 20 to 40 percent . ACTs Sport pressure plates are recommended for use with a street disc.Sport Pressure PlateLight to moderate pedal effort; Available disc life extended by ACTs exclusive diaphragm design; Carefully engineered for improved durability, precisely assembled, accurately balanced; Recommended for street use; 100% clamp load tested and dynamically computer balanced for smooth high RPM reliabilityExcellence in Performance, backed by the best one-year warranty in the industry!