Introducing the ACT Mod-Twin 225 HD Rigid Street T1S-S01 clutch kit, designed for performance enthusiasts who demand both reliability and responsiveness from their vehicles. This innovative clutch system combines a soft pedal feel with quick engagement, making it ideal for high-powered all-wheel drives. The T1S-S01 features a unique rigid Mono-Drive hub, ensuring that shifting is not only smooth but also incredibly precise.
One of the standout features of the T1S-S01 is its dual organic friction surfaces, which provide excellent torque transfer and longevity. Customers have noted how the clutch engages positively, allowing for a seamless driving experience. "I've been using the T1S-S01 for a few months now, and I can really feel the difference in responsiveness," shared a satisfied user. "The pedal feel is just right, not too stiff, and the shifts are quick. It’s a game changer for my Subaru!"
Constructed with a forged aluminum cover and premium friction materials, this clutch kit is built to withstand the rigors of performance driving. The diaphragm spring undergoes a four-stage heat treatment process, enhancing its durability and heat resistance. Additionally, the steel-backed friction plates are designed to maintain a stable friction coefficient, ensuring consistent performance under pressure.
The T1S-S01 kit comes complete with everything you need for installation, including a CNC-machined flywheel, pressure plate cover, diaphragm spring, and more. Each component is engineered for easy serviceability, allowing you to keep your clutch in top shape for years to come. "I appreciate that I can rebuild this clutch myself," noted another customer. "It makes maintenance a lot easier and more cost-effective."
Specifications:
This clutch kit is compatible with the following vehicles:
With the ACT T1S-S01, you’re not just upgrading your clutch; you’re investing in a performance experience that enhances your vehicle's capabilities. Get ready to enjoy a clutch that feels as good as it performs!
Other Part Numbers:
ACT #actT1S-S01
⚠ 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.