ACT MS1-XTR4 Clutch Kit

The ACT MS1-XTR4 is designed for the serious driver who demands high performance from their clutch system. This kit features the Xtreme pressure plate, which utilizes an exclusive diaphragm design that enhances clamp load, minimizes deflection, and extends clutch life. Each diaphragm undergoes a rigorous four-stage heat-treating process, ensuring optimal performance under extreme conditions.

Construction and Performance

The precision cover stampings of the ACT pressure plates ensure both rigidity and consistency, essential for high-stress applications. The 4-pad rigid race discs are constructed from premium ceramic friction materials, providing exceptional heat tolerance and performance. The chrome-moly hub is heat-treated, offering enhanced strength and durability. This lightweight, rigid design facilitates quicker shifts, making it ideal for competitive environments.

Engagement Characteristics

While the 4-pad rigid race disc does result in a harsher engagement, it allows for faster shifting, which is critical for racing applications. This design is particularly effective for smaller disc sizes commonly found in compact engines, delivering a direct connection to the drivetrain that enhances overall responsiveness.

Installation Notes

For detailed installation instructions, refer to the installation guide here.

Specifications

• Clutch Disc Diameter: 9.4 in (240 mm)
• Disc Material: Ceramic
• Input Spline Quantity: 23
• Input Shaft Diameter: 1 in
• Torque Capacity: 565 ft/lbs (1.3 times over OE)
• Product Weight: 14.7 lbs
• Pressure Plate Type: Xtreme
• Release Bearing Included: Yes
• Pilot Bearing Included: Yes
• Grease Included: Yes
• Alignment Tool Included: Yes

Fitment

This clutch kit is confirmed to fit the following models:

• Chrysler Conquest (1987-1989)
• Mitsubishi Starion (1987-1989)