Introducing the ACT SB11-HDG4 Heavy Duty Clutch Kit, a top-tier choice for performance enthusiasts looking to enhance their driving experience. This kit features ACT's renowned Heavy Duty pressure plate, designed with an exclusive diaphragm that significantly increases clamp load while minimizing deflection. This innovative design not only maximizes clutch life but also ensures reliable performance under demanding conditions.
One of the standout features of the SB11-HDG4 is its four-stage heat-treated diaphragm, which contributes to unparalleled performance and durability. Customers have noted that this clutch kit has transformed their driving dynamics, providing a noticeable improvement in responsiveness and engagement. One satisfied user remarked, "The pedal feel is just right—light enough for daily driving but aggressive when I need it on the track!"
The kit includes a 4-pad spring-centered race disc that effectively dampens torsional vibrations, ensuring quieter operation and reducing the risk of failure. Designed for smaller disc sizes in compact engines, this disc allows for faster shifting, making it an excellent choice for both street and race applications. As one customer put it, "Shifting has never felt so quick and precise—it's like a whole new car!"
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Upgrade your vehicle's performance with the ACT SB11-HDG4 Heavy Duty Clutch Kit and experience the difference in your driving experience!
Other Part Numbers:
ACT #actSB11-HDG4
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2006 Subaru Baja |
Baja | 2006 |
|
2006-2008 Subaru Forester |
Forester | 2006-2008 |
|
2005-2012 Subaru Legacy |
Legacy | 2005-2012 |
|
2005-2009 Subaru Outback |
Outback | 2005-2009 |
|
2006-2024 Subaru WRX |
WRX | 2006-2024 |

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.