ACT Heavy Duty Street Clutch Kit Subaru STI/Legacy - SB10-HDSS

240mm | 522 ft-lb | 2004-2021 STI | 2007-2009 Legacy GT spec.B

The ACT SB10-HDSS Heavy Duty Performance Street Sprung clutch kit combines a 522 ft-lb engine torque rating with an organic street disc for the listed Subaru STI and Legacy GT spec.B applications. The Heavy Duty pressure plate adds clamping force, while the spring-centered hub helps cushion drivetrain vibration through starts and shifts. Steel-backed organic lining supports heat transfer and durability, with reduced engagement cushioning for quicker shift action. ACT's Monoloc collar is included to provide a one-piece pull-type release-bearing attachment. The package also includes a release bearing, pilot bearing, alignment tool, and grease. Match the kit to the correct six-speed application and flywheel before installation.

Key Features & Specs:

• Brand: ACT
• Part Number: SB10-HDSS
• Clutch Configuration: Single disc
• Disc Series: Performance Street Sprung
• Product Weight: 18.2 lb
• Torque Capacity at Engine/Crank: 522 ft-lb
• Torque Capacity Increase over OE: 45%
• Pressure Plate Type: Heavy Duty
• Clutch Disc Diameter: 240 mm
• Input Spline Count: 24
• Input Shaft Diameter: 1 in
• Disc Material: Organic
• Pilot Bushing Included: No
• Release Bearing Included: Yes
• Alignment Tool Included: Yes
• Grease Included: Yes
• Pilot Bearing Included: Yes
• Disc Hub: Sprung
• Clutch Slave Cylinder Included: No
• Clutch Master Cylinder Included: No
• Grade Type: Performance
• Pressure Plate Bolts Included: No
• Flywheel Bolts Included: No
• Monoloc Collar 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:

• 2004-2014 Subaru Impreza WRX STI
• 2007,2011-2014 Subaru Impreza WRX STI Limited
• 2010 Subaru Impreza WRX STI Special Edition
• 2007-2009 Subaru Legacy GT spec.B
• 2015-2021 Subaru WRX STI Base
• 2015 Subaru WRX STI Launch Edition
• 2015-2021 Subaru WRX STI Limited
• 2019 Subaru WRX STI S209
• 2016 Subaru WRX STI Series.HyperBlue
• 2018 Subaru WRX STI Type RA

Notes:

• Includes ACT Monoloc.
• Match this kit to the correct six-speed transmission and flywheel for the listed STI and Legacy GT spec.B applications.
• 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