ACT SB9-HDSS Heavy Duty Street Sprung Clutch Kit w/ Monoloc for 1991-2009 Subaru

Vehicle Fitment

• 1991-1994 Subaru Legacy (Sport variants, 2.2L H4 GAS FI)
• 1991-2009 Subaru Impreza (WRX/GT JDM & USDM models, 2.0L-2.5L H4 Turbo GAS FI)
• 2004-2005 Subaru Baja Turbo (2.5L H4 Turbo GAS FI)
• 2004-2005 Subaru Forester XT/XT Premium (2.5L H4 Turbo GAS FI)
• 2007-2009 Subaru Legacy GT spec.B (2.5L H4 Turbo GAS FI)
• 2005 Saab 9-2X Aero (2.0L H4 Turbo GAS FI)

Features

• ACT Heavy Duty diaphragm pressure plate increases clamp load and durability
• Performance street sprung clutch disc with premium organic friction material
• ACT Monoloc one-piece clutch collar replaces two-piece wedge collar/wire ring
• Light to moderate pedal effort with smooth positive engagement
• Quiet operation with OE-to-mild gear rattle under load
• Longer friction life extended by exclusive diaphragm design
• Precision-balanced assembly for smooth high-RPM reliability
• Recommended for street driving and occasional race use

Specifications

• Clutch Disc Diameter: 9 in / 228 mm
• Disc Material: Organic with steel-backed lining
• Disc Type: Sprung street performance
• Pressure Plate Type: Heavy Duty diaphragm
• Input Shaft Diameter: 1 in / 25.4 mm
• Spline Count: 24
• Torque Capacity: ~434 ft-lbs (~27% over OEM)
• Kit Weight: ~16.3 lbs

Included Components

• 1x Heavy Duty diaphragm pressure plate (SB018)
• 1x Performance street sprung clutch disc (3000502)
• 1x ACT Monoloc one-piece clutch collar
• 1x Clutch release bearing (RB601)
• 1x Pilot bearing (PB1004)
• 1x Clutch alignment tool (AT90)

Product Description

The ACT SB9-HDSS Heavy Duty Street Sprung Clutch Kit with Monoloc is a robust performance clutch upgrade designed for a broad range of turbo Subaru and Saab 9-2X models spanning 1991 through 2009. This complete kit pairs a heavy duty diaphragm pressure plate with a sprung organic clutch disc engineered for smooth engagement and extended friction life compared to many stock setups. ACT's Monoloc one-piece clutch collar replaces the traditional two-piece wedge collar and wire ring, improving release bearing alignment and reducing the chance of collar failure - an important upgrade in performance and spirited street applications.

With a torque capacity of approximately **434 ft-lbs** - around **27 % more than typical OEM clutch kits - ** the SB9-HDSS manages higher power levels while maintaining manageable pedal effort and quiet engagement. The premium organic disc and precision balanced assembly help ensure smooth high-RPM reliability, making this kit suitable for street and occasional race use. Direct-fit applications include various **Subaru Impreza WRX (02-05)**, **Legacy Sport and GT spec.B**, **Forester XT**, **Baja Turbo**, and **Saab 9-2X Aero** models. ACT also backs this kit with a one-year limited warranty.