Description
ACT Clutch Kit – 2004-2011 Mazda RX-8
ACT clutch kits combine an application-specific pressure plate and matched disc. Choose by torque requirement, engagement preference, street/track use, and tolerance for drivetrain noise.
Which option should I choose?
The table below uses the rating/specification supplied for each exact ACT SKU where available. We do not copy a torque rating from a different vehicle application.
| Configuration | Application-Specific Ratings & Specs | Driver Guidance |
|---|---|---|
|
Pressure Plate: Heavy Duty | Disc: Performance Street Sprung ACTZM8-HDSS |
Disc material: Premium organic • Pressure plate: Heavy Duty | Smoothest engagement; preferred for primarily street-driven vehicles. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Rigid ACTZM8-HDR6 |
Disc material: Race/puck-style friction disc • Pressure plate: Heavy Duty | Aggressive race engagement, with more modulation than a 4-pad disc. Rigid hub gives direct response with greater drivetrain shock/noise. |
|
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Rigid ACTZM8-HDR4 |
Disc material: Race/puck-style friction disc • Pressure plate: Heavy Duty | Most aggressive puck-style engagement; competition-focused. Rigid hub gives direct response with greater drivetrain shock/noise. |
|
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Sprung ACTZM8-HDG6 |
Disc material: Race/puck-style friction disc • Pressure plate: Heavy Duty | Aggressive race engagement, with more modulation than a 4-pad disc. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Sprung ACTZM8-HDG4 |
Disc material: Race/puck-style friction disc • Pressure plate: Heavy Duty | Most aggressive puck-style engagement; competition-focused. Sprung hub adds driveline damping and street tolerance. |
Configuration Details
Pressure Plate: Heavy Duty | Disc: Performance Street Sprung (ACTZM8-HDSS)
ZM8-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. This Part Fits:
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Rigid (ACTZM8-HDR6)
ZM8-HDR6 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 6-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 6-pad rigid race disc, engagement is harsher, but shifting is faster. The 6-pad rigid race disc is recommended for larger clutch sizes to absorb more heat. This Part Fits:
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Rigid (ACTZM8-HDR4)
ZM8-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. This Part Fits:
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Sprung (ACTZM8-HDG6)
ZM8-HDG6 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 6-pad, spring-centered race disc features a spring-center to properly damp torsional vibrations and resist failure 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 6-pad, spring-centered race disc, engagement is harsher, but shifting is faster. The 6-pad, spring-centered disc is recommended for larger clutch sizes to absorb more heat. This Part Fits:
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Sprung (ACTZM8-HDG4)
ZM8-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. This Part Fits:
Fitment note: Confirm model year, engine, transmission, flywheel, and related clutch components before ordering.