ZM12-HDG4 kit features ACT's most popular Heavy Duty pressure plate. 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 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.
WarrantyThis Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2016-2018 | Mazda | MX-5 Miata | Club |
| 2016-2018 | Mazda | MX-5 Miata | Grand Touring |
| 2017-2018 | Mazda | MX-5 Miata | RF Club |
| 2017-2018 | Mazda | MX-5 Miata | RF Grand Touring |
| 2016-2018 | Mazda | MX-5 Miata | Sport |
| Brand | ACT |
|---|---|
| Type | Clutch Kits - Single |
| SKU | ACTZM12-HDG4 |
| Weight | 18.7 lb |
| Make | Mazda |
| Model | MX-5 Miata |
| Mfr. Part # | ZM12-HDG4 |
| Torque capacity | 399 ft-lbs (at the crank) |
| Torque capacity over stock | 87% |
| Pressure plate type | Heavy Duty |
| Disc material | Ceramic |
| Disc diameter | 8.8 in (224 mm) |
| Input shaft diameter | 0.9375 in |
| Weight | 16.2 lb |
| Recommended use | Recommended for high horsepower street or race use |
| Feel | Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle |
Fits 2016–2018 Mazda MX-5 Miata
Always confirm engine, transmission and chassis before ordering. Call us if you are unsure.
Shipping: Some items may qualify for free shipping with Local Pickup in store. All orders have a 2–3 business day processing time. Some orders may have extended shipping times based on current stock status — we'll confirm the lead time at order placement.
Returns: Accepted within 30 days of delivery for unused product in original packaging. Returns are subject to a 25% Restocking Fee. Special-order and custom-built items are final sale.
Warranty: All products carry the manufacturer's full warranty. Coverage is honored through PMD as your authorized dealer.
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