ACT Heavy Duty Pressure Plate - J011J011 pressure plate features an exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life while maintaining stock to moderate pedal effort. All diaphragms endure a four stage, heat treating process for unparalleled performance. ACT precision pressure plate cover stampings provide rigidity and consistency while precision machined pressure plate castings absorb heat. ACTs Heavy Duty pressure plates increase clamp load