ACT MB1-HDR4 Heavy Duty Clutch Kit

The ACT MB1-HDR4 is a top-tier choice for performance enthusiasts looking to enhance their vehicle's clutch system. Designed specifically for racing applications, this kit features ACT's renowned Heavy Duty pressure plate, which utilizes an exclusive diaphragm design that boosts clamp load while minimizing deflection. This means you can expect improved clutch life and performance under demanding conditions.

Each diaphragm undergoes a meticulous four-stage heat-treating process, ensuring unparalleled durability and reliability. The precision cover stampings of the pressure plate contribute to its rigidity and consistency, making it a dependable option for serious racers.

Customer Feedback

Many customers have praised the MB1-HDR4 for its performance. One user noted, "The engagement is definitely on the aggressive side, but I love how quickly I can shift now. It's a game-changer on the track!" Another mentioned, "I was impressed with the overall build quality. It feels robust and ready to handle the heat." However, some users have pointed out the increased gear rattle, which is expected with this type of setup.

Features & Benefits

• Light to moderate pedal effort for easier operation
• Aggressive engagement allows for quicker shifts
• Designed to extend friction life through ACT's unique diaphragm technology
• High-quality ceramic friction materials provide excellent heat tolerance
• Recommended for race use only, ensuring optimal performance in competitive settings
• 100% clamp load tested and dynamically balanced for reliability at high RPMs

Technical Specifications

• Clutch Disc Diameter: 8.8 in (224 mm)
• Disc Material: Ceramic
• Input Spline Quantity: 20
• Input Shaft Diameter: 0.875 in
• Torque Capacity: 415 ft/lbs
• Product Weight: 10.3 lbs
• Grease Included: Yes
• Alignment Tool Included: Yes
• Release Bearing Included: Yes

Fitment

This clutch kit is compatible with the following vehicles:

• Chrysler Sebring (2003-2004)
• Dodge Stealth (1991-1996)
• Eagle Summit (1992-1994 & 1996)
• Eagle Talon (1991-1998)
• Mitsubishi 3000GT (1991-1999)
• Mitsubishi Eclipse (1990-2005)
• Mitsubishi Expo (1992-1995)
• Mitsubishi Galant (1991-1998)
• Plymouth Colt (1992-1994)
• Plymouth Laser (1990-1994)

Installation Instructions

For detailed installation instructions, CLICK HERE.