ACT 2011 Chevrolet Corvette P/PL Sport Clutch Pressure PlateGM015S 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. ACT's Sport pressure plates increase clamp load by 20 to 40 percent . ACT's Sport pressure plates are recommended for use with a street disc. This Part Fits: Year Make