ACT ZM8-HDG4 HD/Race Clutch Kits - ACT 2004 Mazda RX-8 HD/Race Sprung 4 Pad Clutch Kit for a 2004-2007 Mazda RX-8 Base, 2005-2005 Mazda RX-8 Shinka, 2008-2008 Mazda RX-8 40th Anniversary Edition, 2008-2009 Mazda RX-8 Touring, 2008-2011 Mazda RX-8 Grand Touring, 2008-2011 Mazda RX-8 Sport and 2009-2011 Mazda RX-8 R3.
Manufacturer: ACT
Product: ACT HD/Race Clutch Kits
Part Number: ZM8-HDG4
UPC: 842385008864
MSRP: $671.00
$544.00
Free Shipping (Continental US)
New with manufacturer warranty
Availability:
IN STOCK (1) - LOW
SHIPS FROM MANUFACTURER
(Last checked: 02/13/2026)
Shipping times vary by Manufacturer
(Can take days or weeks, contact us for an ETA)
SHIPS FROM MANUFACTURER
(Last checked: 02/13/2026)
Shipping times vary by Manufacturer
(Can take days or weeks, contact us for an ETA)
Have a question regarding this product? Contact us.
Fitment:
NOTES: ACT 2004 Mazda RX-8 HD/Race Sprung 4 Pad Clutch Kit
| Years | Make | Model | Trim | ||
|---|---|---|---|---|---|
| 2004 - 2007 | Mazda | RX-8 | Base | ||
| 2005 - 2005 | Mazda | RX-8 | Shinka | ||
| 2008 - 2008 | Mazda | RX-8 | 40th Anniversary Edition | ||
| 2008 - 2009 | Mazda | RX-8 | Touring | ||
| 2008 - 2011 | Mazda | RX-8 | Grand Touring | ||
| 2008 - 2011 | Mazda | RX-8 | Sport | ||
| 2009 - 2011 | Mazda | RX-8 | R3 |
Description:
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. HD/Race Sprung 4 Pad.
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.
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.
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IN STOCK - LOW
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2009-2011 Mazda RX-8 R3
2008-2011 Mazda RX-8 Grand Touring
2004-2007 Mazda RX-8 Base
2008-2008 Mazda RX-8 40th Anniversary Edition
2008-2009 Mazda RX-8 Touring
2005-2005 Mazda RX-8 Shinka
2009-2011 Mazda RX-8 R3
2008-2011 Mazda RX-8 Grand Touring
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2008-2008 Mazda RX-8 40th Anniversary Edition
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SHIPS FROM MANUFACTURER
Shipping times vary by Manufacturer
(Can take days or weeks, contact us for an ETA)
Shipping times vary by Manufacturer
(Can take days or weeks, contact us for an ETA)
2008-2011 Mazda RX-8 Sport
2005-2005 Mazda RX-8 Shinka
2009-2011 Mazda RX-8 R3
2008-2011 Mazda RX-8 Grand Touring
2004-2007 Mazda RX-8 Base
2008-2008 Mazda RX-8 40th Anniversary Edition
2008-2009 Mazda RX-8 Touring
2005-2005 Mazda RX-8 Shinka
2009-2011 Mazda RX-8 R3
2008-2011 Mazda RX-8 Grand Touring
2004-2007 Mazda RX-8 Base
2008-2008 Mazda RX-8 40th Anniversary Edition
2008-2009 Mazda RX-8 Touring
SPEC Stage 2 Clutch Kits SZ482
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SHIPS FROM MANUFACTURER
Shipping times vary by Manufacturer
(Can take days or weeks, contact us for an ETA)
Shipping times vary by Manufacturer
(Can take days or weeks, contact us for an ETA)
2008-2008 Mazda RX-8 Sport
2005-2005 Mazda RX-8 Shinka
2008-2008 Mazda RX-8 Grand Touring
2004-2007 Mazda RX-8 Base
2008-2008 Mazda RX-8 40th Anniversary Edition
2008-2008 Mazda RX-8 Touring
2005-2005 Mazda RX-8 Shinka
2008-2008 Mazda RX-8 Grand Touring
2004-2007 Mazda RX-8 Base
2008-2008 Mazda RX-8 40th Anniversary Edition
2008-2008 Mazda RX-8 Touring

