If you're looking to take your clutch game to the next level, the ACT GM11-HDR4 HD/Race Rigid 4 Pad Kit is where it's at. This isn’t just any clutch kit; it's got ACT's Heavy Duty pressure plate, which is their most sought-after option for a reason. The unique diaphragm design cranks up the clamp load, cuts down on deflection, and helps your clutch last longer. Plus, each diaphragm goes through a four-stage heat-treating process, so you know it’s built to handle the heat of performance driving.
Now, let’s talk about the 4-pad rigid race discs. These bad boys are crafted from top-notch ceramic friction materials, and the chrome-moly hub is heat-treated to ensure it can take a beating. The lightweight design means quicker shifts, which is a game changer for those of us who love the thrill of racing. Just a heads up though—engagement is a bit harsher, but that’s what makes shifting feel so crisp and responsive. This setup is particularly great for smaller engines where every bit of performance counts.
Installation Tips:
What You Can Expect:
Specs Breakdown:
Important Note:
Fits perfectly on the Chevrolet Cobalt from 2005 to 2010. If you’re serious about performance, this kit is worth every penny.
Other Part Numbers:
ACT #actGM11-HDR4
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2005-2010 Chevrolet Cobalt |
Cobalt | 2005-2010 |

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.