ACT ZM8-HDG6 HD/Race Sprung 6-Pad Clutch Kit for Mazda RX-8

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. HD/Race Sprung 6 Pad Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle; Moderate friction life, extended by ACT's exclusive diaphragm design; Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance; Recommended for high horsepower street or race use; 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 ZM8-HDG6 HD/Race Sprung 6-Pad Clutch Kit is engineered for high-horsepower street and race applications that demand dependable clamping force, fast shifting, and high heat tolerance. This kit combines ACT’s Heavy Duty pressure plate with a 6-pad, spring-centered race disc for aggressive engagement and reliable performance under harsh driving conditions. It is designed for select Mazda RX-8 applications and provides a performance-focused upgrade over a conventional stock clutch system.

ACT Heavy Duty pressure plates use an exclusive diaphragm design to increase clamp load, reduce deflection, and help maximize clutch life. Each diaphragm undergoes a four-stage heat-treating process, while precision cover stampings improve rigidity and consistency. The included spring-centered race disc helps damp torsional vibrations and resist failure during demanding use. Its ceramic friction material provides high heat tolerance, while the six-pad configuration promotes faster shifting and is recommended for larger clutch sizes that need to absorb more heat.

The ZM8-HDG6 is carefully engineered, precisely assembled, accurately balanced, and 100% clamp-load tested. Pedal effort remains light to moderate, but engagement is harsher than an OE-style clutch and may produce mild gear rattle. Friction life is moderate and can be extended by ACT’s diaphragm design. Spring retainers with wraparound windows and thicker stampings improve spring support, reduce stress concentrations, and increase strength and reliability. This ACT clutch kit is backed by a one-year warranty and is suitable for performance-oriented street vehicles and race builds.

Fitment

Designed for select 2004–2011 Mazda RX-8 applications. Verify vehicle year, drivetrain configuration, and clutch compatibility before ordering.

What's Included

• ACT Heavy Duty pressure plate
• ACT HD/Race sprung 6-pad clutch disc
• Clutch kit components supplied by ACT for the ZM8-HDG6 application

Features:

• Heavy Duty diaphragm design increases clamp load, reduces deflection, and supports extended clutch life
• Six-pad, spring-centered race disc helps damp torsional vibration while delivering faster, more aggressive shifting
• Select ceramic friction materials provide high heat tolerance for high-horsepower street and race use
• 100% clamp-load tested and dynamically computer balanced for smooth, reliable performance at high engine speeds

Fitments:
2004 Mazda RX-8 Base
2005 Mazda RX-8 Base
2005 Mazda RX-8 Shinka
2006 Mazda RX-8 Base
2007 Mazda RX-8 Base
2008 Mazda RX-8 40th Anniversary Edition
2008 Mazda RX-8 Grand Touring
2008 Mazda RX-8 Sport
2008 Mazda RX-8 Touring
2009 Mazda RX-8 Grand Touring
2009 Mazda RX-8 R3
2009 Mazda RX-8 Sport
2009 Mazda RX-8 Touring
2010 Mazda RX-8 Grand Touring
2010 Mazda RX-8 R3
2010 Mazda RX-8 Sport
2011 Mazda RX-8 Grand Touring
2011 Mazda RX-8 R3
2011 Mazda RX-8 Sport

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