ACT Heavy Duty Street Clutch Kit with Monoloc - SB9-HDSS

228mm | 434 ft-lb | Organic Sprung Disc | Monoloc Collar Included

The ACT SB9-HDSS Heavy Duty Performance Street Sprung clutch kit supports the listed Subaru and Saab applications with a 434 ft-lb engine torque rating. Its organic disc combines progressive engagement with steel-backed lining for heat transfer and durability, while the sprung hub cushions torsional vibration. A Heavy Duty pressure plate supplies increased holding force, and the included Monoloc collar provides a one-piece pull-type release-bearing attachment. The kit also includes a release bearing, pilot bearing, alignment tool, and grease. Flywheel requirements vary by application, including specific Forester and WRX requirements and a stock dual-mass flywheel note for Legacy GT spec.B, so review those details before installation.

Key Features & Specs:

• Brand: ACT
• Part Number: SB9-HDSS
• Clutch Configuration: Single disc
• Disc Series: Performance Street Sprung
• Product Weight: 16.3 lb
• Torque Capacity at Engine/Crank: 434 ft-lb
• Torque Capacity Increase over OE: 27%
• Pressure Plate Type: Heavy Duty
• Clutch Disc Diameter: 228 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:

• 2005 Saab 9-2X Aero — 2.0L H4, 1994cc
• 2004-2005 Subaru Baja Turbo — 2.5L H4, 2458cc
• 2004-2005 Subaru Forester XT — 2.5L H4, 2458cc; Must use an ACT flywheel or a 2003-2005 WRX flywheel.
• 2005 Subaru Forester XT Premium — 2.5L H4, 2458cc; Must use an ACT flywheel or a 2003-2005 WRX flywheel.
• 2002-2005 Subaru Impreza WRX — 2.0L H4, 1994cc; 2002 model requires an ACT flywheel or a 2003-2005 WRX flywheel.
• 2007-2009 Subaru Legacy GT spec.B — 2.5L H4, 2458cc; Designed for use with the stock dual-mass flywheel.
• 1991-1994 Subaru Legacy Sport — 2.2L H4, 2212cc

Notes:

• Includes ACT Monoloc.
• 2004-2005 Forester XT and 2005 Forester XT Premium: must use an ACT flywheel or a 2003-2005 WRX flywheel.
• 2002 Impreza WRX: must use an ACT flywheel or a 2003-2005 WRX flywheel.
• 2007-2009 Legacy GT spec.B: designed for use with the stock dual-mass flywheel.
• 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