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ACT pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure an exclusive four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency and some are reinforced to reduce flex, improve efficiency and the feel of the pressure plate. ACT pressure plates are manufactured from new units not rebuilt from worn out parts. 100 percent tested and computer balanced for smooth operation at high RPM. ACT's Heavy Duty pressure plates increase clamp load by 20 to 50 percent and have a pedal feel that is stock to moderate. ACT's Heavy Duty pressure plates are recommended for use with a street or race disc.