ZM4-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. ACT 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 Performance Street discs feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs have reduced marcel for faster shift action to complement ACT pressure plates, with increased strength and reliability.
| Item Description | HD/Perf Street Sprung |
| Product Weight (lbs.) | 13.4 |
| Flywheel Torque Capacity (ft/lbs.) | 281 |
| Torque Capacity Over OE | 34% |
| Disc Material | Organic |
| Pressure Plate Type | Heavy Duty |
| Feel | Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle |
| Life | Longer friction life, extended by ACT's exclusive diaphragm design |
| Quality | Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade |
| Recommended Use | Recommended for street and race use |
| ACT Difference | 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability |
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015 | Mazda | MX-5 Miata | 25th Anniversary Edition |
| 2013-2015 | Mazda | MX-5 Miata | Club |
| 2006-2015 | Mazda | MX-5 Miata | Grand Touring |
| 2011-2012 | Mazda | MX-5 Miata | Special Edition |
| 2006,2013 | Mazda | MX-5 Miata | Sport |
| 2007-2012 | Mazda | MX-5 Miata | Touring |