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  See more parts for Subaru Impreza
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ACT Mod-Twin 225 HD Sprung Race Subaru Impreza | STI | WRX 2004-2021 - T1R-S05
ACT Mod-Twin 225 HD Sprung Race Subaru Impreza | STI | WRX 2004-2021 - T1R-S05 - Image 4 ACT Mod-Twin 225 HD Sprung Race Subaru Impreza | STI | WRX 2004-2021 - T1R-S05 - Image 2 ACT Mod-Twin 225 HD Sprung Race Subaru Impreza | STI | WRX 2004-2021 - T1R-S05 - Image 3 ACT Mod-Twin 225 HD Sprung Race Subaru Impreza | STI | WRX 2004-2021 - T1R-S05 - Image 4

ACT T1R-S05 Mod-Twin 225 HD Sprung Race Clutch Kit

Experience the thrill of performance with the ACT T1R-S05 Mod-Twin 225 HD Sprung Race Clutch Kit. Designed specifically for high-powered AWD vehicles, this clutch kit combines cutting-edge engineering with robust materials for exceptional performance. Whether you're launching off the line or shifting gears at high speeds, the T1R-S05 ensures smooth transitions and aggressive engagement.

Features and Benefits

  • Enhanced Launch Performance: The unique design features twice the ceramic friction surfaces, allowing for aggressive launches without compromising control.
  • Smoother Shifting: The ultra-durable Mono-Drive sprung hub assembly provides a consistent light pedal feel, making gear changes effortless.
  • Durable Construction: Each diaphragm spring undergoes a meticulous four-stage heat treatment process, ensuring longevity and resilience under demanding conditions.
  • High Friction Coefficient: Puck-style friction plates made from premium ceramic materials deliver superior heat capacity and extended clutch life.
  • Modular Design: The completely modular setup means that components can be easily replaced or serviced, enhancing the overall lifespan of the clutch.

What Customers Are Saying

"I've been using the T1R-S05 for a few months now, and the difference is night and day. The engagement is precise, and I love how it handles power during launches!" - Mark D.

"This clutch kit has transformed my driving experience. Shifting feels so much smoother, and I can feel the extra power going to the wheels." - Lisa T.

Technical Specifications

  • Clutch Disc Diameter: 8.8 in (225 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1 in
  • Torque Capacity: 895 ft/lbs
  • Weight: 28.1 lbs
  • SFI Certification: 1.2

Installation Instructions

For step-by-step installation guidance, please CLICK HERE.

Fitment

This clutch kit is compatible with the following models:

  • Subaru Impreza 2004-2014
  • Subaru STI 2004-2021
  • Subaru WRX 2004-2020

Upgrade your vehicle's performance with the ACT T1R-S05 Mod-Twin 225 HD Sprung Race Clutch Kit and experience the difference in every drive!

Other Part Numbers:
ACT #actT1R-S05

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle Make/Model
Subaru Impreza 2004-2014 WRX STI
Subaru Impreza 2004-2005 RS
Subaru Impreza 2004 TS
Subaru Impreza 2004 Outback
Subaru Impreza 2004-2014 WRX
Subaru Impreza 2005-2011 Outback Sport
Subaru Impreza 2006-2007 WRX TR
Subaru Impreza 2006-2007, 2010-2014 WRX Limited
Subaru Impreza 2006-2011 2.5i
Subaru Impreza 2007, 2011-2014 WRX STI Limited
Subaru Impreza 2008 2.0R
Subaru Impreza 2008-2014 Sport
Subaru Impreza 2009-2010 2.5 GT
Subaru Impreza 2009-2012 R
Subaru Impreza 2009-2014 WRX Premium
Subaru Impreza 2010 2.5i Limited
Subaru Impreza 2010 WRX SE
Subaru Impreza 2010-2011 2.5i Premium
Subaru Impreza 2010 WRX GT
Subaru Impreza 2010 WRX STI Special Edition
Subaru Impreza 2011 XV
Subaru Impreza 2012-2014 Premium
Subaru Impreza 2012-2014 Sport Limited
Subaru Impreza 2012-2014 Sport Premium
Subaru Impreza 2012-2014 Limited
Subaru Impreza 2012-2014 Touring
Subaru Impreza 2012-2014 Base
Subaru Impreza 2013-2014 I Sport
Subaru Impreza 2013-2014 i
Subaru Impreza 2014 I Limited
Subaru WRX 2012-2016 STI
Subaru WRX 2012-2020 Base
Subaru WRX 2013-2020 Limited
Subaru WRX 2014 SE
Subaru WRX 2015-2020 Premium
Subaru WRX 2017-2020 Sport
Subaru WRX 2017-2020 Sport-tech
Subaru WRX 2018-2020 CVT
Subaru WRX 2018-2020 6 Man
Subaru WRX 2019 Raui Edition
Subaru WRX 2019-2020 Sport-tech RS
Subaru WRX STI 2013-2021 Base
Subaru WRX STI 2013-2014, 2017-2021 Sport-tech
Subaru WRX STI 2014 Tsurugi Edition
Subaru WRX STI 2015 Launch Edition
Subaru WRX STI 2015-2021 Limited
Subaru WRX STI 2016 Series.HyperBlue
Subaru WRX STI 2017-2021 Sport
Subaru WRX STI 2018 Type RA
Subaru WRX STI 2018-2021 STI
Subaru WRX STI 2019 S209
Subaru WRX STI 2020 Kanrai Edition

ACT Banner

ACT ? Advanced Clutch Technology | Clutch Kits & Flywheels Built to Handle Real Power

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.
  • Hold More Power Engineered to handle turbo, supercharger, and high-compression builds
  • Faster Engagement Stronger pressure plates for better bite off the line
  • Better Pedal Feel Balanced response without going full race-car stiff
  • Reduced Rotational Mass Lightweight flywheels improve rev-matching and response
  • No Guesswork Direct-fit applications, no fabbing, no hassle
ACT Clutch Kits and Flywheels Fit the Cars Enthusiasts Build

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:
  • Performance Clutch Kits From HD street kits to twin-disc race systems
  • Clutch Discs 6-puck, full-face, rigid or sprung to match your style
  • Pressure Plates Heavy-duty options that increase clamp load without sacrificing control
  • Chromoly Lightweight Flywheels Quicker revs, smoother shifts, and less drivetrain stress
  • Complete Hardware Kits Everything you need for a proper install
Performance Tested. Driver Approved.

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.

ACT warrants all products to be free of defects in materials and workmanship for normal use and service for a period of one (1) year from retail purchase. Written notice must be immediately given to ACT within the warranty period. We require a copy of the purchase receipt showing the unit was purchased from an Authorized Dealer or Advanced Clutch Technology directly to verify the product is under warranty. Products purchased used do not carry a warranty. This warranty is to the original purchaser and is non-transferable. All non-warranty items are subject to a $50 inspection bench test fee.

ACT reserves the right to examine any part returned for warranty claim to determine, to ACT's satisfaction, whether the material or workmanship of the part does not conform to this limited warranty. ACT's obligation under this warranty shall be limited to repairing, replacing, or crediting, at its option, any part which is deemed covered by ACT. No labor, lift or storage charges will be reimbursed for any reason. Damage to ACT's parts resulting from misuse, improper use, or abuse shall void this limited warranty. Failure to follow ACT's installation instructions and the vehicle manufacturers installation procedures and specifications shall void this limited warranty.

ACT undertakes no responsibility for the quality of the goods except as otherwise provided in this contract. ACT assumes no responsibility that the goods will be fit for any particular purpose for which you may be buying these goods, except as otherwise provided in the contract. ACT shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty.

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