ACT 13-21 Subaru WRX STi Mod-Twin 225 HD Rigid Race Clutch Kit

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SKU: ACTT1R-S01
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T1R-S01 Mod-Twin 225 HD Rigid Race Kit tackles aggressive launches ...Read More

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Sale price$1,632.99 Regular price$2,225.00
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit
T1R-S01 Mod-Twin 225 HD Rigid Race Kit tackles aggressive launches and rapid shifting of high powered AWD’s by combining twice the ceramic friction surfaces with a no-nonsense solid Mono-Drive hub in a completely modular design. Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel. Puck-style Friction Plates with high quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These Friction Plates uniformly transfer torque to a Mono-Drive chrome-moly hub which is heat treated for strength and durability extending input shaft life with one continuous spline. The lightweight, rigid design allows for quicker shifts and trouble-free service. This kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool and pilot bearing (if needed). Mod-Twin clutches are fully rebuildable and most components can be ordered separately.
Installation Instructions
Warranty


This Part Fits:

Year Make Model Submodel
2006 Subaru Baja Turbo
2008 Subaru Forester Sports 2.5 XT
2006-2008 Subaru Forester XT Limited
2006-2014 Subaru Impreza WRX
2006-2007,2010-2014 Subaru Impreza WRX Limited
2009-2014 Subaru Impreza WRX Premium
2006-2007 Subaru Impreza WRX TR
2010-2012 Subaru Legacy 2.5GT
2005-2006 Subaru Legacy GT
2005,2007-2009 Subaru Legacy GT Limited
2006-2009 Subaru Legacy GT spec.B
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited
2015-2024 Subaru WRX Base
2015-2025 Subaru WRX Limited
2015-2025 Subaru WRX Premium
2025 Subaru WRX TS

Product Details

Product Description
Part Numbers
Sizing & Fit
T1R-S01 Mod-Twin 225 HD Rigid Race Kit tackles aggressive launches and rapid shifting of high powered AWD’s by combining twice the ceramic friction surfaces with a no-nonsense solid Mono-Drive hub in a completely modular design. Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel. Puck-style Friction Plates with high quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These Friction Plates uniformly transfer torque to a Mono-Drive chrome-moly hub which is heat treated for strength and durability extending input shaft life with one continuous spline. The lightweight, rigid design allows for quicker shifts and trouble-free service. This kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool and pilot bearing (if needed). Mod-Twin clutches are fully rebuildable and most components can be ordered separately.
Installation Instructions
Warranty


This Part Fits:

Year Make Model Submodel
2006 Subaru Baja Turbo
2008 Subaru Forester Sports 2.5 XT
2006-2008 Subaru Forester XT Limited
2006-2014 Subaru Impreza WRX
2006-2007,2010-2014 Subaru Impreza WRX Limited
2009-2014 Subaru Impreza WRX Premium
2006-2007 Subaru Impreza WRX TR
2010-2012 Subaru Legacy 2.5GT
2005-2006 Subaru Legacy GT
2005,2007-2009 Subaru Legacy GT Limited
2006-2009 Subaru Legacy GT spec.B
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited
2015-2024 Subaru WRX Base
2015-2025 Subaru WRX Limited
2015-2025 Subaru WRX Premium
2025 Subaru WRX TS

Product Details

Product Description
T1R-S01 Mod-Twin 225 HD Rigid Race Kit tackles aggressive launches and rapid shifting of high powered AWD’s by combining twice the ceramic friction surfaces with a no-nonsense solid Mono-Drive hub in a completely modular design. Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel. Puck-style Friction Plates with high quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These Friction Plates uniformly transfer torque to a Mono-Drive chrome-moly hub which is heat treated for strength and durability extending input shaft life with one continuous spline. The lightweight, rigid design allows for quicker shifts and trouble-free service. This kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool and pilot bearing (if needed). Mod-Twin clutches are fully rebuildable and most components can be ordered separately.
Installation Instructions
Warranty


This Part Fits:

Year Make Model Submodel
2006 Subaru Baja Turbo
2008 Subaru Forester Sports 2.5 XT
2006-2008 Subaru Forester XT Limited
2006-2014 Subaru Impreza WRX
2006-2007,2010-2014 Subaru Impreza WRX Limited
2009-2014 Subaru Impreza WRX Premium
2006-2007 Subaru Impreza WRX TR
2010-2012 Subaru Legacy 2.5GT
2005-2006 Subaru Legacy GT
2005,2007-2009 Subaru Legacy GT Limited
2006-2009 Subaru Legacy GT spec.B
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited
2015-2024 Subaru WRX Base
2015-2025 Subaru WRX Limited
2015-2025 Subaru WRX Premium
2025 Subaru WRX TS

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