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  See more parts for Chrysler Sebring
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ACT HD/Race Rigid 4 Pad Kit Mitsubishi | Dodge | Chrysler 1990-2005 - MB1-HDR4

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.

Other Part Numbers:
ACT #actMB1-HDR4

Proposition 65

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

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

ACT Banner

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
  • Faster Engagement Stronger pressure plates for better bite off the line
  • Better Pedal Feel Balanced response without going full race-car stiff
  • Reduced Rotational Mass Lightweight flywheels improve rev-matching and response
  • No Guesswork Direct-fit applications, no fabbing, no hassle
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:
  • Performance Clutch Kits From HD street kits to twin-disc race systems
  • Clutch Discs 6-puck, full-face, rigid or sprung to match your style
  • Pressure Plates Heavy-duty options that increase clamp load without sacrificing control
  • Chromoly Lightweight Flywheels Quicker revs, smoother shifts, and less drivetrain stress
  • Complete Hardware Kits Everything you need for a proper install
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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