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ACT HD/Race Rigid 6 Pad Kit Ford Mustang 1999-2004 - FM3-HDR6

If you’re looking to upgrade your Mustang’s clutch setup, the ACT FM3-HDR6 Heavy Duty/Race Rigid 6 Pad Kit is a solid choice. This isn’t just any clutch kit; it’s built for those who really push their cars to the limit. The heart of this kit is ACT's Heavy Duty pressure plate, which has a unique diaphragm design that cranks up the clamp load. What does that mean for you? Less deflection and a longer clutch life—perfect for hard driving or racing conditions.

Now, let’s talk about the details. Each diaphragm goes through a four-stage heat-treating process that ensures top-notch performance. You’ll notice that ACT doesn’t skimp on quality; the pressure plates are precision-stamped to maintain rigidity and consistency, which is crucial when you’re shifting gears at high RPMs.

The 6-pad rigid race discs are where the magic really happens. Made from high-quality ceramic friction materials, they’re designed to handle heat like a champ. The chrome-moly hub is heat-treated, giving it the strength and durability you need when the pedal hits the metal. And yes, the lightweight design means you’ll be shifting quicker, although be prepared for a harsher engagement. It’s all about getting those shifts done fast, which is what racing is about, right?

For those of you who are serious about performance, this kit is definitely geared towards race use. You’ll feel the difference in pedal effort—it’s light to moderate, but the engagement is aggressive, which might lead to a bit of gear rattle. That’s just part of the deal when you’re pushing the limits.

As for the specs, this kit is designed for an 11-inch clutch disc diameter (280 mm) and has a torque capacity of 770 ft/lbs, which is a noticeable bump over stock. It’s got a 10-spline input, and yes, it comes with grease and an alignment tool to make your installation smoother. Just keep in mind, you’ll need to source a few parts separately like the clutch master cylinder and pressure plate bolts.

Want to dive into the installation process? You can find the instructions here.

In short, if you’re serious about your Mustang—especially if it’s a 1999-2004 GT or SVT Cobra—this clutch kit is a no-brainer. It’s engineered for performance and built to last, giving you the confidence to push your car to its limits.

Other Part Numbers:
ACT #actFM3-HDR6

Proposition 65

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

Vehicle
1999-2004
 Ford Mustang
1999-2004
 Ford Mustang GT
1999, 2001, 2003-2004
 Ford Mustang SVT Cobra

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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
  • 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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