T030S 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.