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Twice the Clamp, Half the Drama on Your WRX
The ACT T2SS-S01 Mod-Twin 225 XT Sprung Street clutch kit gives 2013-2023 Subaru WRX owners a factory-feel pedal with room to grow into serious turbo power. This kit pairs twin organic friction discs with a sprung Mono-Drive hub, so daily commuting stays smooth while the driveline is protected against harsh torsional shock from a built engine. It is rated for 710 ft-lbs, a 126 percent jump over stock, without the chatter or heavy pedal effort that usually comes with twin-disc setups.
Key Features
- 710 ft-lbs torque capacity, 126 percent over OE
- Sprung Mono-Drive hub reduces driveline shock and protects the input shaft
- Four-stage heat-treated diaphragm spring for a consistent light pedal feel
- Steel-backed organic friction plates for stable friction coefficient and long life
- T2SS-S01 includes a CNC-machined, dynamically balanced StreetLite flywheel
- Fully rebuildable Mod-Twin design, most components available separately
- Computer spin balanced to within 0.25 oz-in
- SFI 1.2 certified and 100 percent clamp-load tested
Fitment Table
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2013-2014 | Subaru | WRX | Limited |
| 2013-2014 | Subaru | WRX | Premium |
| 2015-2021 | Subaru | WRX | Limited |
| 2015-2021 | Subaru | WRX | Premium |
| 2017-2023 | Subaru | WRX | Sport |
| 2017-2023 | Subaru | WRX | Sport-tech |
| 2022-2023 | Subaru | WRX | Limited |
| 2022-2023 | Subaru | WRX | Premium |
Specifications
| Detail | Value |
|---|---|
| Part Number | T2SS-S01 |
| Product Weight | 27.4 lbs |
| Torque Capacity | 710 ft-lbs |
| Torque Capacity Over OE | 126 percent |
| Clutch Disc Diameter | 8.8 in (225 mm) |
| Disc Material | Organic |
| Disc Type | Sprung |
| Pressure Plate Type | Xtreme |
| Input Shaft Diameter | 1 in |
| Input Spline Quantity | 24 |
| Flywheel Included | Yes |
| Release Bearing Included | Yes |
| Pilot Bearing Included | Yes |
| Alignment Tool Included | Yes |
| SFI Rating | 1.2 |
| Warranty | 12 months |
What's Included
- CNC-machined and dynamically balanced StreetLite flywheel
- Pressure plate cover and diaphragm spring
- Puck-style ceramic friction plates
- Sprung Mono-Drive hub assembly and floater
- Patented Monoloc collar
- Release bearing and pilot bearing
- Alignment tool
About ACT
Advanced Clutch Technology has engineered performance clutch systems since 1987, building every kit around real-world torque capacity, pedal feel, and long-term durability. Each Mod-Twin assembly is 100 percent clamp-load tested and computer spin balanced before it leaves the factory, backed by a 12-month warranty and a dedicated technical support team for WRX and STI platforms like the T2SS-S01.
FAQ
What is the T2SS-S01?The T2SS-S01 is the ACT Mod-Twin 225 XT Sprung Street clutch kit built for 2013-2023 Subaru WRX models, rated to handle up to 710 ft-lbs of torque while keeping a street-friendly pedal feel.
Will this clutch kit work with a stock WRX engine?Yes. This kit is designed to hold well beyond stock power levels, so it performs smoothly on an unmodified WRX and has plenty of headroom as boost and torque increase.
Does this kit include a flywheel?Yes. Every kit ships with a CNC-machined, dynamically balanced StreetLite flywheel, so no separate flywheel purchase is needed.
How much break-in time does this clutch need?ACT recommends 300 to 500 miles of mild, stop-and-go driving before spirited use to properly seat the organic friction surfaces.
Is this clutch louder or harsher than a stock clutch?Drivers can expect OE to mild transmission gear noise, along with a soft, progressive engagement and light pedal effort compared to typical twin-disc setups.
Can this clutch be rebuilt instead of replaced?Yes. The Mod-Twin design is fully rebuildable, and most internal components can be ordered separately when service is needed.
What pressure plate does this kit use?It uses an Xtreme pressure plate, which can increase pedal effort by 50 to 80 percent depending on the application while still staying manageable for daily driving.
Does the kit include an alignment tool?Yes, T2SS-S01 kits include an alignment tool to simplify clutch disc centering during installation.
Install Instructions
- Remove the transmission and disconnect the driveshaft per the WRX factory service manual
- Remove the factory clutch and flywheel from the flange
- Inspect and resurface or replace the rear main seal as needed before reassembly
- Mount the included StreetLite flywheel and torque the bolts to factory spec in a star pattern
- Install the friction discs and Mono-Drive hub assembly using the supplied alignment tool
- Mount the pressure plate cover and diaphragm spring, torquing bolts evenly in stages
- Install the release bearing and pilot bearing, then reinstall the transmission
- Break in the clutch with 300 to 500 miles of mild, stop-and-go driving before spirited use
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ACT
ACT (Advanced Clutch Technology) parts are stocked at Black Ops Auto Works. Shop clutch kits, pressure plates, clutch discs, flywheels, release bearings, pilot bearings, and alignment tools for a broad range of import and domestic platforms including Subaru, Mitsubishi, Honda, Mazda, BMW, Ford, Audi, Volkswagen, and Nissan. Every product is filterable by year, make, model, trim, and engine so the correct clutch ships the first time. Black Ops Auto Works carries 555 ACT SKUs across clutch kits, discs, flywheels, and drivetrain hardware categories. What This Brand Covers ACT is a US manufacturer of performance clutch systems built for street, strip, and track use. The lineup ranges from HD Performance Street clutches designed for daily driven cars to XT and race sprung and rigid disc clutch kits built for serious horsepower and repeated abuse. Product Range ACT clutch kits, individual pressure plates and discs, flywheels, release and pilot bearings, and clutch alignment tools cove...
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