ACT ZM8-HDSS Heavy Duty Performance Street Sprung Clutch Kit for Mazda RX-8

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. HD/Perf Street Sprung Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle; Longer friction life, extended by ACT's exclusive diaphragm design; Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade; Recommended for street and 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-HDSS Heavy Duty Performance Street Sprung Clutch Kit combines a Heavy Duty pressure plate with a Performance Street sprung disc for dependable street performance and responsive shifting. Designed for the Mazda RX-8, this clutch kit delivers light to moderate pedal effort, smooth positive engagement, and OE-to-mild gear rattle characteristics.

ACT's Heavy Duty pressure plate uses 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 Performance Street disc uses premium organic friction materials with high copper content for improved heat transfer, reduced fade, and enhanced durability. Steel-backed friction linings provide greater burst strength, and reduced marcel supports faster shift action.

The ACT ZM8-HDSS is carefully engineered, precisely assembled, accurately balanced, and 100% clamp-load tested. Dynamic computer balancing supports smooth, reliable operation at high RPM, making this kit suitable for street and race use. The sprung disc helps maintain comfortable drivability while providing the strength and friction performance needed for modified or performance-oriented applications. ACT backs this clutch kit with a one-year warranty.

Fitment: This kit is listed for select 2004, 2005, 2006, 2007, 2010, and 2011 Mazda RX-8 applications. Confirm vehicle year, transmission, engine configuration, and existing clutch specifications before ordering.

What's Included

• ACT Heavy Duty pressure plate
• ACT Performance Street sprung clutch disc
• Clutch kit components required for installation as supplied by ACT

Features:

• Heavy Duty diaphragm pressure plate: Increases clamp load, reduces deflection, and supports extended clutch life.
• Four-stage heat-treated diaphragm: Provides consistent performance and durability under demanding operating conditions.
• Premium organic friction disc: Delivers smooth engagement, heat tolerance, and reduced fade for street and race use.
• Steel-backed, reduced-marcel sprung disc: Improves burst strength, durability, and shift response while maintaining comfortable pedal action.

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