ACT Clutch Kits & Flywheels

ACT HD/Race Sprung 4-Pad Clutch Kit | 2016-2018 Mazda MX-5 Miata ND (ZM10-HDG4)

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Heavy Duty / Race 4-Pad Sprung Clutch Kit by ACT

ZM10-HDG4 kit features ACT's most popular Heavy Duty pressure plate and their 4-pad, spring-centered race disc.

CT Heavy Duty pressure plates use 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 4-pad spring-centered race disc features a spring-center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. With the 4-pad spring-centered race disc, engagement is harsher, but shifting is faster. ACT's 4-pad spring-centered race disc is well-suited for smaller disc sizes in smaller engines.


  • Feel - Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
  • Life - Moderate friction life, extended by ACT's exclusive diaphragm design
  • Quality - Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
  • Recommended Use - Recommended for high horsepower street or race use
  • ACT Difference - 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Please Note: 225mm upgrade. Must use ACT flywheel (included in kit).


  • 2016 - 2018 Mazda MX-5 Miata (ND)


  • Torque Capacity (ft/lbs.): 399
  • Torque Capacity Over OE: 87%
  • Spline Count: 22
  • Spline Size (in.): 15/16
  • Disc Diameter (in/mm): 8.8/224
  • Product Weight (lbs.): 26.8

What's In The Box?

  • 1 - Heavy Duty Pressure Plate
  • 1 - 4-Pad Sprung Race Disc
  • 1 - ACT Flywheel
  • 1 - Release Bearing
  • 1 - Pilot Bearing
  • 1 - Alignment Tool



  • ACT 1 Year Limited Warranty

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