ACT ZM4-HDR4 Mazda MX-5 Miata HD/Race Rigid 4 Pad Clutch Kit

ACT Clutch ZM4-HDR4 Features:

ZM4-HDR4 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 rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines.

• Includes Clutch Pressure Plate (MZ032), Clutch Alignment Tool (AT03), Clutch Pilot Bearing (PB1030), Clutch Friction Disc (4224008), Clutch Release Bearing (RB110)
• Light To Moderate Pedal Effort
• Aggressive Engagement
• Increased Gear Rattle; Moderate Friction Life
• Extended by ACT's Exclusive Diaphragm Design
• Rigid Design May Increase Spline Wear; Carefully Engineered
• Precisely Assembled
• Accurately Balanced
• Uses Select Ceramic Friction Materials For High Heat Tolerance And Maximum Performance; Recommended For Race Use Only; 100-percent Clamp Load Tested And Dynamically Computer Balanced For Smooth High Rpm Reliability
• Weight: 12 lbs.
• Torque Capacity: 359 ft.-lbs.
• Torque Capacity Over OE: 71-percent
• Pilot Bushing: Yes
• Pressure Plate Type: Heavy-Duty
• Release Bearing: Yes
• Clutch Disc Diameter: 8.8 in.
• Clutch Disc Diameter: 224 mm
• Disc Material: Ceramic
• Input Spline Quantity: 23
• Input Shaft Diameter: 1 in.
• Alignment Tool Included: Yes

ACT Clutch ZM4-HDR4 Notes:

• 6 speed applications only.

Vehicle Fitment