ACT ZM8-HDR4 Heavy Duty/Race Rigid 4 Pad Kit

The ACT ZM8-HDR4 kit is engineered for those who demand high performance from their clutch system. This kit features ACT's renowned Heavy Duty pressure plate, designed with an exclusive diaphragm that significantly increases clamp load while minimizing deflection. This innovative design not only enhances clutch longevity but also ensures reliable performance under extreme conditions.

Key Features

• Light to moderate pedal effort with aggressive engagement.
• Moderate friction life, extended by ACT's unique diaphragm design; however, the rigid setup may lead to increased spline wear.
• Constructed with select ceramic friction materials for superior heat tolerance and performance.
• Recommended for race applications only, ensuring optimal performance in competitive environments.
• Each unit is 100% clamp load tested and dynamically balanced for reliability at high RPMs.

Specifications

• Clutch Disc Diameter: 9.4 in (240 mm)
• Disc Material: Ceramic
• Input Spline Quantity: 23
• Input Shaft Diameter: 1 in
• Pressure Plate Type: Heavy Duty
• Torque Capacity: 420 ft/lbs
• Product Weight: 14.1 lbs

Installation Notes

Installation requires an ACT counterweight if using an ACT flywheel (sold separately). Ensure proper alignment using the included alignment tool for optimal performance.

Fitment

Compatible with Mazda RX-8 models from 2004 to 2011.

Included Components

• Release Bearing: Yes
• Pilot Bearing: Yes
• Grease: Yes
• Alignment Tool: Yes

For detailed installation instructions, click here.