Heavy Duty Race Sprung 4 Pad Clutch Kit

• 2004-2011 Mazda | RX-8

ACT Heavy Duty Race Sprung 4 Pad Clutch Kit (ZM8-HDG4)

Note: Flywheel requires counterweight (flywheel and counterweight sold separately or with flywheel kit). Must use ACT counterweight with ACT flywheel.

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.

Kit contents

• MZ010 - ACT Heavy Duty Clutch Pressure Plate
• 4240208 - ACT 4 Pad Sprung Race Clutch Disc
• RB110 - ACT Clutch Release Bearing
• AT03 - ACT Clutch Alignment Tool
• PB1013 - ACT Clutch Pilot Bearing

Specifications

• Product weight (lbs.): 15.4
• Torque capacity (ft/lbs.): 420
• Torque capacity over OE: 72%
• Disc material: Ceramic
• Clutch disc diameter (in.): 9.4
• Clutch disc diameter (mm): 240
• Input shaft diameter (in.): 1
• Pressure plate type: Heavy Duty
• Warranty: 12 months

Characteristics

• Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
• Life: Moderate friction life, extended by ACT's exclusive diaphragm design
• Quality: Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
• Recommended Use: Recommended for high horsepower street or race use
• ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Fitment

• 2004-2011 Mazda RX-8 (Base 2004-2007; Shinka 2005; 40th Anniversary 2008; GS, Touring 2008-2009; GT, Grand Touring, Sport 2008-2011; R3 2009-2011)

Q: Best high horsepower clutch kit for a 2004-2011 Mazda RX-8?
A: The ACT ZM8-HDG4 Heavy Duty Race Sprung 4 Pad Clutch Kit is recommended for high horsepower street or race use and fits the 2004-2011 Mazda RX-8 (Base 2004-2007; Shinka 2005; 40th Anniversary 2008; GS, Touring 2008-2009; GT, Grand Touring, Sport 2008-2011; R3 2009-2011).

Q: What comes in the ACT ZM8-HDG4 clutch kit for a 2004-2011 Mazda RX-8?
A: It includes MZ010 - ACT Heavy Duty Clutch Pressure Plate; 4240208 - ACT 4 Pad Sprung Race Clutch Disc; RB110 - ACT Clutch Release Bearing; AT03 - ACT Clutch Alignment Tool; PB1013 - ACT Clutch Pilot Bearing.

Q: Does the ACT ZM8-HDG4 clutch kit for a 2004-2011 Mazda RX-8 need a flywheel counterweight?
A: Yes. Note: Flywheel requires counterweight (flywheel and counterweight sold separately or with flywheel kit). Must use ACT counterweight with ACT flywheel.

Q: Is the ACT ZM8-HDG4 clutch kit good for a street-driven 2004-2011 Mazda RX-8?
A: Yes. Recommended for high horsepower street or race use. Feel: light to moderate pedal effort, aggressive engagement, OE to mild gear rattle.

Q: How much torque does the ACT ZM8-HDG4 hold vs a stock 2004-2011 Mazda RX-8 clutch?
A: 420 ft/lbs. torque capacity, 72% over OE.

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