The ZM2-HDG4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use an exclusive diaphragm design to increase clamp load, reduce deflection, and maximize clutch life, with all diaphragms undergoing a four-stage heat-treating process. ACT's 4-pad spring-centered race disc uses a spring-center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. Spring retainers use wraparound spring windows and thicker retainer stampings to reduce stress concentrations and increase strength and reliability. With the 4-pad spring-centered race disc, engagement is harsher but shifting is faster; this disc is well-suited for smaller disc sizes in smaller engines.
WarrantyInstallation Instructions
Specifications
- Kit Type: HD Pressure Plate / 4-Pad Spring-Centered Race Disc
- Disc Configuration: 4-pad, spring-centered
- Included Components: Pressure plate, disc
- Warranty: 1-year ACT limited warranty
- Part Number: ZM2-HDG4
Vehicle Applications
| Year | Make | Model | Trim |
|---|---|---|---|
| 1990 | Mazda | Miata | Base |
| 1991 | Mazda | Miata | Base |
| 1991 | Mazda | Miata | SE |
| 1992 | Mazda | Miata | Base |
| 1993 | Mazda | Miata | Base |
| 1993 | Mazda | Miata | LE |
| 1994 | Mazda | Miata | Base |
| 1994 | Mazda | Miata | M Edition |
| 1995 | Mazda | Miata | Base |
| 1995 | Mazda | Miata | M Edition |
| 1996 | Mazda | Miata | Base |
| 1996 | Mazda | Miata | M Edition |
| 1997 | Mazda | Miata | Base |
| 1997 | Mazda | Miata | M Edition |
| 1997 | Mazda | Miata | STO |
| 1999 | Mazda | Miata | 10th Anniversary |
| 1999 | Mazda | Miata | Base |
| 2000 | Mazda | Miata | Base |
| 2000 | Mazda | Miata | LS |
| 2000 | Mazda | Miata | SE |
| 2001 | Mazda | Miata | Base |
| 2001 | Mazda | Miata | LS |
| 2001 | Mazda | Miata | SE |
| 2002 | Mazda | Miata | Base |
| 2002 | Mazda | Miata | LS |
| 2002 | Mazda | Miata | SE |
| 2003 | Mazda | Miata | Base |
| 2003 | Mazda | Miata | LS |
| 2003 | Mazda | Miata | SE |
| 2003 | Mazda | Miata | Shinsen |
| 2004 | Mazda | Miata | Base |
| 2004 | Mazda | Miata | LS |
| 2004 | Mazda | Miata | Mazdaspeed |
| 2005 | Mazda | Miata | Base |
| 2005 | Mazda | Miata | LS |
| 2005 | Mazda | Miata | Mazdaspeed |
Frequently Asked Questions
What is a 4-pad spring-centered race disc best suited for?
ACT recommends the 4-pad spring-centered disc for smaller disc sizes in smaller-displacement engines like the Miata.
Does the 4-pad disc feel different from a full-face street disc?
Yes, engagement is harsher than a street disc, but shifting is faster because of the reduced friction-pad contact area.
Which Miata years does the ZM2-HDG4 fit?
It is confirmed for 1990-2005 Mazda Miata models, as listed in the Vehicle Applications table.
What warranty applies to the ZM2-HDG4?
ACT backs the ZM2-HDG4 with a one-year limited warranty.