ACT HD Street Clutch Kit with Streetlite Flywheel - SB11-HDSS

240mm Conversion Kit | 449 ft-lb | Organic Sprung Disc | Streetlite Flywheel

The ACT SB11-HDSS Heavy Duty Performance Street Sprung kit upgrades the listed Subaru applications with a matched 240mm clutch and Streetlite flywheel. Its 449 ft-lb engine torque rating gives the build additional holding capacity, while an organic spring-centered disc supports progressive engagement and cushions drivetrain vibration. Steel-backed lining helps transfer heat, and the lighter flywheel reduces rotating inertia for a more responsive engine. The package includes the required flywheel, release bearing, pilot bearing, alignment tool, and pressure plate bolts. This is a conversion assembly, so observe the flywheel requirement and the revised factory-component compatibility note rather than selecting it by clutch diameter alone.

Key Features & Specs:

• Brand: ACT
• Part Number: SB11-HDSS
• Clutch Configuration: Single disc
• Disc Series: Performance Street Sprung
• Product Weight: 28.6 lb
• Torque Capacity at Engine/Crank: 449 ft-lb
• Torque Capacity Increase over OE: 46%
• Pressure Plate Type: Heavy Duty
• Clutch Disc Diameter: 240 mm
• Input Spline Count: 24
• Input Shaft Diameter: 1 in
• Disc Material: Organic
• Alignment Tool Included: Yes
• Flywheel Included: Yes
• Release Bearing Included: Yes
• Flywheel Type: Streetlite
• Grease Included: Yes
• Disc Hub: Sprung
• Clutch Slave Cylinder Included: No
• Clutch Master Cylinder Included: No
• Grade Type: Performance
• Pressure Plate Bolts Included: Yes
• Flywheel Bolts Included: No
• Pilot Bushing Included: No
• Pilot Bearing Included: Yes
• Feature: Four-stage heat-treated pressure plate diaphragm
• Feature: Precision cover stampings support rigidity and consistency
• Feature: Copper-containing organic friction material supports heat transfer
• Feature: Steel-backed friction lining supports strength and durability
• Feature: Reduced engagement cushioning supports quicker shift action
• Pressure Plate and Disc Assembly: Included

Fitment:

• 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
• 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; ACT conversion assembly required; do not mix with revised factory 240mm components introduced at VIN J806877 during the 2018 model year.
• 2015-2026 Subaru WRX Limited; ACT conversion assembly required; do not mix with revised factory 240mm components introduced at VIN J806877 during the 2018 model year.
• 2015-2026 Subaru WRX Premium; ACT conversion assembly required; do not mix with revised factory 240mm components introduced at VIN J806877 during the 2018 model year.
• 2026 Subaru WRX Series.Yellow; ACT conversion assembly required; do not mix with revised factory 240mm components introduced at VIN J806877 during the 2018 model year.
• 2024 Subaru WRX TR; ACT conversion assembly required; do not mix with revised factory 240mm components introduced at VIN J806877 during the 2018 model year.
• 2025-2026 Subaru WRX TS; ACT conversion assembly required; do not mix with revised factory 240mm components introduced at VIN J806877 during the 2018 model year.

Notes:

• Conversion Kit. Replaces original 230mm clutch. Must use ACT Flywheel (included in kit). Subaru has incorporated 240mm clutch components into production during mid-2018MY production starting with VIN J806877. ACT clutch kits and flywheels are not compatible with the revised OEM components. Pressure plate bolts included (M8-1.25 x 16mm).
• ACT recommends 300-500 miles of mild engagement for organic street discs before spirited driving or racing. Follow the application-specific installation instructions.

California Proposition 65: Warning: This product can expose you to chemicals including carbon black, glass wool fibers, or silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov