ACT 1991 Mazda Miata HD/Race Sprung 6 Pad Clutch Kit

Item SKU: ZM1-HDG6

ACT Transmission Clutch Kit for the 1991 Mazda Miata. This HD/Race Sprung 6 Pad Clutch Kit pairs ACT's Heavy Duty pressure plate with a spring-centered six-pad ceramic race disc for high-horsepower street or race use.

• Pressure plate: ACT's Heavy Duty unit uses an exclusive diaphragm design to raise clamp load while reducing deflection. The diaphragm receives a four-stage heat treatment, and the precision-stamped cover adds rigidity and consistency.
• Disc: Spring-centered six-pad ceramic race disc. The spring center damps torsional vibration, while the ceramic friction material is set up to handle heat under harder use.
• Engagement: Aggressive engagement with light to moderate pedal effort. Expect OE to mild gear rattle. This stuff shifts quicker than a full-face street disc, but it is not the setup for someone looking for a soft takeoff in traffic.
• Disc hardware: Wraparound spring windows and thicker retainer stampings support the damper springs and reduce stress at the retainers under harsh use.
• Friction life: Moderate, with clutch life supported by the Heavy Duty pressure plate's diaphragm design.
• Assembly: Each kit is 100% clamp-load tested and dynamically computer balanced for smooth operation at high RPM.

For a Miata that's moved beyond a basic street clutch, the ZM1-HDG6 keeps the sprung hub so there is still torsional damping in the driveline, while the six-pad disc gives you the faster, firmer engagement expected from a race-oriented setup. No more treating a high-horsepower street or track car like it needs an OE-style disc. Just keep the aggressive engagement and moderate friction life in mind when matching the kit to how the car is actually used.