ACT ZM2-HDR4 Heavy Duty/Race Rigid 4-Pad Clutch Kit for Mazda Miata

ZM2-HDR4 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 rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines. HD/Race Rigid 4 Pad Light to moderate pedal effort, aggressive engagement, increased gear rattle; Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear; Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance; Recommended for race use only; 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

• "Excellence in Performance", backed by the best one-year warranty in the industry!

The ACT ZM2-HDR4 Heavy Duty/Race Rigid 4-Pad Clutch Kit is engineered for drivers who need dependable clutch performance, quick gear changes, and high heat tolerance in demanding applications. This ACT kit combines a Heavy Duty pressure plate with a rigid four-pad ceramic race disc for aggressive engagement and reliable operation during high-performance driving.

ACT's exclusive diaphragm design increases clamp load, reduces deflection, and helps maximize clutch life. The diaphragm undergoes a four-stage heat-treating process, while the precision-stamped pressure plate cover provides rigidity and consistent operation. The 4-pad rigid race disc uses select ceramic friction material for high heat tolerance and maximum performance. Its heat-treated chrome-moly hub provides strength and durability, while the lightweight, rigid construction supports faster shifting and dependable service at high RPM.

The ACT ZM2-HDR4 is designed for light to moderate pedal effort, aggressive engagement, and faster shifting, though its rigid race design may increase gear rattle and spline wear. This clutch kit is recommended for race use only and is well suited to smaller disc applications and smaller engines. Every pressure plate is clamp-load tested and dynamically computer balanced to support smooth, reliable high-speed operation. The kit is backed by ACT's industry-leading one-year warranty.

Fitment: Designed for select 1994-1999 Mazda Miata applications. Verify vehicle year, engine, transmission, and existing clutch specifications before installation.

• ACT ZM2-HDR4 clutch kit
• Heavy Duty pressure plate
• 4-pad rigid ceramic race disc
• Installation components supplied by ACT for the application

Features:

• Heavy Duty pressure plate: ACT's exclusive diaphragm design increases clamp load, reduces deflection, and supports extended clutch life.
• Four-stage heat-treated diaphragm: Enhances pressure plate performance and durability under demanding operating conditions.
• 4-pad rigid ceramic race disc: Provides high heat tolerance, aggressive engagement, and faster shifting for race-focused applications.
• Balanced high-RPM construction: Precision assembly, computer balancing, and a heat-treated chrome-moly hub promote smooth, reliable performance.

Fitments:
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

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1