If you're looking to upgrade your clutch setup, the Advanced Clutch XT/Perf Street Sprung SB11-XTSS kit is worth checking out. This isn't just any clutch; it's got an Xtreme pressure plate designed for those who really push their vehicles to the limit. The unique diaphragm design increases clamp load, so you get better performance without the usual deflection that can wear out your clutch too quickly. Plus, each diaphragm goes through a four-stage heat-treating process, ensuring it can handle the heat when you're putting the pedal to the metal.
What I really appreciate about the ACT pressure plates is their precision cover stampings. They provide a level of rigidity and consistency that you can feel when driving. And let's talk about the performance street discs—they’re a fan favorite for a reason. Made with premium organic materials that have a high copper content, these discs excel at heat transfer, which means less fade during those long drives or spirited runs. They’re also steel-backed for added durability and have a reduced marcel for quicker shifts, making your driving experience smoother and more responsive.
Now, I won't sugarcoat it; this kit does require a moderate to heavy pedal effort, but that just means you're in control. The engagement is smooth, and while you might notice a bit of gear rattle, it’s nothing too bothersome. Plus, the longevity of the friction life is impressive, thanks to that exclusive diaphragm design that ACT has nailed down.
When it comes to installation, you’ll want to check out the detailed install instructions here. The kit comes with everything you need—except the clutch master and slave cylinders, but it does include grease and an alignment tool, which is a nice touch.
Here’s a quick rundown of the specs:
Just a heads up—this is a conversion kit, so it replaces the original 230mm clutch. If you’ve got a Subaru made after mid-2018, you’ll need to check your VIN, as they started using 240mm components. And yes, the pressure plate bolts are included, so you’re all set there.
Fits the following:
Overall, if you’re serious about performance and want a clutch that can keep up with your driving style, the SB11-XTSS kit is a solid choice. It’s built to last and designed for drivers who demand more from their vehicles.
Other Part Numbers:
ACT #actSB11-XTSS
⚠ 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.