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ACT MaXX/Race Rigid 4 Pad Kit Chrysler Conquest | Mitsubishi Starion 1983-1989 - MS1-XXR4

ACT MaXX/Race Rigid 4 Pad Kit MS1-XXR4

The ACT MaXX/Race Rigid 4 Pad Kit MS1-XXR4 is engineered for performance-driven applications, focusing on durability and efficiency. This kit features a MaXX pressure plate designed specifically for serious automotive applications, utilizing a unique diaphragm design that enhances clamp load while minimizing deflection. This results in increased clutch life, making it a reliable choice for high-performance setups.

Construction and Design

Each diaphragm undergoes a rigorous four-stage heat-treating process, ensuring superior performance under demanding conditions. The precision cover stampings of the pressure plate contribute to its rigidity and consistent performance, essential for competitive driving.

Disc Features

The 4-pad rigid race disc is constructed from high-quality ceramic friction materials, providing excellent heat tolerance and performance. The chrome-moly hub is heat-treated, adding strength and durability to the design. This lightweight, rigid construction allows for quicker shifts, enhancing overall driving dynamics. However, note that the engagement is more aggressive, resulting in a harsher feel during operation, which is typical for race-oriented applications.

Installation Notes

For detailed installation instructions, refer to the installation guide.

Specifications

  • Clutch Disc Diameter: 9.4 in (240 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 23
  • Input Shaft Diameter: 1 in
  • Torque Capacity: 625 ft/lbs
  • Torque Capacity Over OE: 1.56
  • Product Weight: 14.8 lbs
  • Alignment Tool Included: Yes
  • Release Bearing Included: Yes
  • Pilot Bearing Included: Yes
  • Grease Included: Yes

Fitment

This kit is compatible with the following vehicles:

  • Chrysler Conquest (1987-1989)
  • Mitsubishi Starion (1983-1989)

The ACT MaXX/Race Rigid 4 Pad Kit MS1-XXR4 is recommended strictly for race use, given its heavy pedal effort and aggressive engagement characteristics. It is designed for those who prioritize speed and performance in their driving experience.

Other Part Numbers:
ACT #actMS1-XXR4

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1987-1989
 Chrysler Conquest
1983-1989
 Mitsubishi Starion

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ACT ? Advanced Clutch Technology | Clutch Kits & Flywheels Built to Handle Real Power

If you've added boost, tuned for more power, or simply want better throttle control, then your stock clutch won't cut it. That?s where ACT (Advanced Clutch Technology) comes in delivering high-performance clutch kits and flywheels designed for real drivers who push their builds on the street, strip, or track.

ACT?s lineup includes everything from daily driver friendly HD kits to hardcore twin disc setups for serious horsepower. Whether you?re launching hard in a WRX, drifting in a 370Z, or canyon carving in an M3, ACT gives you the torque capacity and engagement you need without sacrificing drivability.

Why ACT? Because Power Without Control Is Useless.
  • Hold More Power Engineered to handle turbo, supercharger, and high-compression builds
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ACT Clutch Kits and Flywheels Fit the Cars Enthusiasts Build

ACT doesn?t just make universal performance parts ? they build complete, vehicle-specific clutch solutions for enthusiast favorites. Whether you daily a Civic Type R, track a Subaru STI, drift a 240SX, or drag a Mustang GT, ACT offers the right clutch to match your build goals.

Top supported platforms include the Nissan 350Z/370Z, Toyota Supra A90, Chevy Camaro SS/ZL1, Mitsubishi Evo, Ford Focus RS/ST, and BMW M3/M4 ? each with clutch options tuned to your driving needs.

What ACT Offers:
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Performance Tested. Driver Approved.

ACT isn?t hype ? it?s proven. Their clutches are SFI-certified, track-tested, and used by racers in drag, time attack, autocross, drift, and rally. But what really matters? They hold power, last longer, and feel right even after hundreds of hard launches or hours of canyon carving.

Whether you're upgrading for more power or replacing a tired OEM clutch, ACT gives you the bite, strength, and feel to drive harder with confidence. No compromises, no excuses just parts that work when it matters.

ACT warrants all products to be free of defects in materials and workmanship for normal use and service for a period of one (1) year from retail purchase. Written notice must be immediately given to ACT within the warranty period. We require a copy of the purchase receipt showing the unit was purchased from an Authorized Dealer or Advanced Clutch Technology directly to verify the product is under warranty. Products purchased used do not carry a warranty. This warranty is to the original purchaser and is non-transferable. All non-warranty items are subject to a $50 inspection bench test fee.

ACT reserves the right to examine any part returned for warranty claim to determine, to ACT's satisfaction, whether the material or workmanship of the part does not conform to this limited warranty. ACT's obligation under this warranty shall be limited to repairing, replacing, or crediting, at its option, any part which is deemed covered by ACT. No labor, lift or storage charges will be reimbursed for any reason. Damage to ACT's parts resulting from misuse, improper use, or abuse shall void this limited warranty. Failure to follow ACT's installation instructions and the vehicle manufacturers installation procedures and specifications shall void this limited warranty.

ACT undertakes no responsibility for the quality of the goods except as otherwise provided in this contract. ACT assumes no responsibility that the goods will be fit for any particular purpose for which you may be buying these goods, except as otherwise provided in the contract. ACT shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty.

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