The ACT CW04 Flywheel Counterweight is an essential component for those looking to enhance their vehicle's performance with an XACT flywheel. Designed with precision and durability in mind, this counterweight ensures that your engine runs smoothly and efficiently. Whether you're a seasoned racer or a car enthusiast, the CW04 will help you achieve optimal performance.
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Many customers have praised the CW04 for its quality and performance. One user noted, "After installing the CW04 with my new ACT flywheel, I noticed a significant improvement in engine responsiveness. The fit was perfect, and it felt like my car was running smoother than ever!" Another customer added, "I appreciate the attention to detail in the machining. It made balancing a breeze, and I feel confident in the longevity of my engine." With the ACT CW04, you can trust that you're investing in a product designed to support your vehicle's performance needs.
Other Part Numbers:
ACT #actCW04
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1964-1973, 1979-1993 Ford Mustang |
Mustang | 1964-1973, 1979-1993 |
|
1974-1978 Ford Mustang II |
Mustang II | 1974-1978 |

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.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: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.