ACT SB12-XTSS Xtreme Street Clutch for 2005-2026 Subaru WRX 2.5L/2.0L/2.4L

Vehicle Fitment

• 2005-2006 Subaru Legacy GT/GT Limited - 2.5L H4 Turbo - AWD - Manual
• 2006 Subaru Legacy GT spec.B - 2.5L H4 Turbo - AWD - Manual
• 2006 Subaru Outback XT/XT Limited - 2.5L H4 Turbo - AWD - Manual
• 2006 Subaru Baja Turbo - 2.5L H4 Turbo - AWD - Manual
• 2006-2008 Subaru Forester XT Limited - 2.5L H4 Turbo - AWD - Manual
• 2008 Subaru Forester 2.5 XT/Sports 2.5 XT - 2.5L H4 Turbo - AWD - Manual
• 2006-2014 Subaru Impreza WRX - 2.5L H4 Turbo - AWD - Manual
• 2006-2007 Subaru Impreza WRX Limited/TR - 2.5L H4 Turbo - AWD - Manual
• 2009-2014 Subaru Impreza WRX Premium/SE - 2.5L H4 Turbo - AWD - Manual
• 2008-2009 Subaru Legacy GT/GT Limited/spec.B - 2.5L H4 Turbo - AWD - Manual
• 2008-2009 Subaru Outback XT/XT Limited - 2.5L H4 Turbo - AWD - Manual
• 2010-2012 Subaru Legacy 2.5GT - 2.5L H4 Turbo - AWD - Manual
• 2012-2014 Subaru WRX Base/Limited/SE - 2.5L H4 Turbo - AWD - Manual
• 2015-2021 Subaru WRX Base/Limited/Premium - 2.0L H4 - AWD - Manual
• 2017-2021 Subaru WRX Sport/Sport-tech - 2.0L H4 - AWD - Manual
• 2019 Subaru WRX Raui Edition/Sport-tech RS - 2.0L H4 - AWD - Manual
• 2022-2023 Subaru WRX Base/Limited/Premium/Sport/Sport-tech - 2.4L H4 - AWD - Manual
• 2024 Subaru WRX Base/Limited/Premium/RS/Sport/Sport-tech/TR - 2.4L H4 - AWD - Manual
• 2025 Subaru WRX High/Limited/Premium/Sport/Sport-tech/TS - 2.4L H4 - AWD - Manual
• 2026 Subaru WRX High/Limited/Premium/Series.Yellow/Sport/Sport-tech/TS/tS Performance - 2.4L H4 - AWD - Manual

Fitment Notes

• 240mm clutch upgrade designed for compatible Subaru manual-transmission applications.
• ACT identifies the SB12-XTSS as a 240mm upgrade from the OE 230mm clutch and flywheel system.
• WRX STI applications are not part of the standard U.S. WRX fitment listed by ACT; the 2006-2007 JDM Impreza WRX STI entries shown by ACT are separately identified as JDM applications.
• 2018 WRX fitment should be verified against the vehicle's specific clutch configuration because ACT's catalog lists the 2018 application by 6-speed/manual configuration.
• 2015-2021 WRX applications use the 2.0L engine, while 2022-2026 WRX applications use the 2.4L engine.
• All listed vehicle applications use AWD and manual transmissions.

Features

• Xtreme pressure plate designed for high-clamp-load performance applications.
• Performance Street sprung clutch disc for smooth engagement and street drivability.
• Premium organic friction material provides progressive engagement.
• High copper content improves friction-material heat transfer.
• Steel-backed friction lining increases burst strength and durability.
• Reduced marcel provides faster shift action.
• Four-stage heat-treated diaphragm improves pressure-plate durability.
• Precision pressure-plate cover stampings improve rigidity and consistency.
• Computer-balanced assembly supports smooth high-RPM operation.
• Designed for demanding street and race use.
• 240mm clutch design provides increased heat capacity compared with the OE 230mm system.

Specifications

• Brand: ACT / Advanced Clutch Technology
• Part Number: SB12-XTSS
• Product Type: Xtreme Performance Street Sprung Clutch Kit
• Pressure Plate Type: Xtreme
• Disc Type: Performance Street Sprung
• Disc Material: Organic
• Clutch Disc Diameter: 9.4 in / 240 mm
• Input Shaft Diameter: 1 in
• Torque Capacity: 532 lb-ft at the engine crank
• Torque Capacity Over OE: 72%
• Flywheel Type: ACT Prolite
• Product Weight: 24.3 lb
• Warranty: 12 months
• Transmission: Manual
• Drive Type: AWD

Included Components

• 1x Xtreme pressure plate
• 1x Performance Street sprung organic clutch disc
• 1x ACT Prolite chromoly flywheel
• 1x Release bearing
• 1x Alignment tool
• 1x Clutch hardware set
• 1x Pressure plate bolt set - M8-1.25 x 16 mm

Product Description

The ACT SB12-XTSS Xtreme Performance Street Sprung Clutch Kit is designed for compatible turbocharged Subaru applications requiring increased torque capacity while maintaining street-oriented drivability. The kit combines ACT's Xtreme pressure plate with a Performance Street sprung organic disc and ACT Prolite flywheel in a 240mm upgrade package. The larger clutch design provides increased heat capacity and durability compared with the original 230mm system used on applicable vehicles.

The Xtreme pressure plate uses ACT's diaphragm design to increase clamp load, reduce deflection, and support longer clutch life. Its four-stage heat-treated diaphragm and precision cover stampings improve rigidity and consistency. The Performance Street organic disc uses premium friction material with high copper content for improved heat transfer, while the steel-backed lining provides increased burst strength and durability. Reduced marcel helps provide quicker shift action while retaining smooth engagement suitable for street driving.

The SB12-XTSS is rated at 532 lb-ft of torque at the engine crank, representing a 72% increase over OE capacity. ACT specifies the kit for street and race use and includes the Prolite flywheel, release bearing, alignment tool, and clutch hardware. It is intended for compatible AWD manual-transmission Subaru applications listed above, with exact vehicle configuration and clutch size requiring verification before installation.