If you're looking to take your Subaru's performance to the next level, the Advanced Clutch HD/Race Rigid 4 Pad SB11-HDR4 kit is worth your attention. This isn't just another clutch kit; it's built for those who want serious power and reliability on the track or the street. The heart of this kit is ACT's Heavy Duty pressure plate, which is designed with a unique diaphragm that ramps up the clamp load while minimizing deflection. This means you get a clutch that not only lasts longer but also handles the heat better, thanks to a four-stage heat-treating process that ensures top-notch performance.
Now, let’s talk about the 4-pad rigid race discs. Made from high-quality ceramic friction materials, these discs are tough as nails. The chrome-moly hub is heat-treated, so you know it can take a beating. The lightweight design means you can shift quicker—ideal for those moments when you need to get into gear fast. Sure, the engagement is a bit harsher, but that’s the trade-off for quicker shifts. If you're running a smaller engine, this setup is particularly well-suited for you.
Installation is straightforward:
What to expect:
Here are the nitty-gritty specs:
Important notes:
Fits the following models:
So, if you're serious about performance and want to feel the difference in your shifts, this clutch kit could be just what you need. It's built for those who push their cars to the limit.
Other Part Numbers:
ACT #actSB11-HDR4
⚠ 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.