ACT Heavy Duty Race Sprung 4-Pad Clutch Kit for 1990-1993 Mazda Miata (ZM1-HDG4)

Fits 1990-1993 Mazda Miata. The ACT ZM1-HDG4 Heavy Duty Race clutch kit is engineered for drivers who prioritize fast shifting and high torque capacity. This kit combines ACT's popular Heavy Duty pressure plate with a 4-pad spring-centered race disc, offering a significant increase in clamp load over the factory setup while maintaining structural integrity under harsh racing conditions.

The Heavy Duty pressure plate features an exclusive diaphragm design that undergoes a four-stage heat-treating process for consistent performance. Precision cover stampings ensure rigidity, reducing deflection and maximizing clutch life. The included 4-pad race disc uses a spring-center hub to damp torsional vibrations, protecting your drivetrain while enabling the aggressive engagement required for competitive use.

• Manufacturer Part Number: ZM1-HDG4
• Heavy Duty pressure plate increases clamp load and reduces deflection
• 4-pad ceramic race disc for high heat capacity and rapid shifting
• Spring-centered hub damps torsional vibrations for quieter operation
• Precision-stamped cover for maximum rigidity and consistency
• Wraparound spring windows and thicker retainer stampings for increased strength
• Diaphragm heat-treated for long-term durability and performance