ZM8-HDR4 - HD/Race Rigid 4 Pad

Specifications: HD/Race Rigid 4 Pad Clutch Kit

• Item Description: HD/Race Rigid 4 Pad
• Product Weight (lbs.): 14.1
• Torque Capacity (ft/lbs.): 420
• Torque Capacity Over OE: 72%
• Disc Material: Ceramic
• Clutch Disc Diameter (Inches): 9.4
• Clutch Disc Diameter (Millimeters): 240
• Input Shaft Diameter (inches): 1
• Pressure Plate Type: Heavy Duty
• Warranty: 12 Months (view details)

Description: The ZM8-HDR4 kit by ACT features their most popular Heavy Duty pressure plate. These pressure plates utilize an exclusive diaphragm design to enhance clamp load, diminish deflection, and maximize clutch life. Each diaphragm undergoes a four-stage heat-treating process for exceptional performance. Precision cover stampings ensure rigidity and consistency.

The 4-pad rigid race discs in this kit are manufactured with high-quality ceramic friction materials. The chrome-moly hub is heat-treated to augment strength and durability. Its lightweight, rigid design enables quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. This disc type is well-suited for smaller disc sizes in smaller engines.

Key Characteristics:

• Feel: Light to moderate pedal effort, aggressive engagement, increased gear rattle.
• Life: Moderate friction life, extended by ACT's exclusive diaphragm design. The rigid design may increase spline wear.
• Quality: Carefully engineered, precisely assembled, accurately balanced, using select ceramic friction materials for high heat tolerance and maximum performance.

Recommended Use: Recommended for race use only, ideal for applications where durability and high performance under extreme conditions are essential.

ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability.

Vehicle Fitment: Compatible with various Mazda RX-8 models ranging from 2004 to 2011, equipped with the 1.3 R2 GAS FI 1308cc engine.