Description
ACT Clutch Kit – 2007-2009 Subaru Legacy Spec.B / 2004-2021 Subaru Impreza WRX STI
ACT clutch kits combine an application-specific pressure plate and matched disc. Choose by torque requirement, engagement preference, street/track use, and tolerance for drivetrain noise.
Which option should I choose?
The table below uses the rating/specification supplied for each exact ACT SKU where available. We do not copy a torque rating from a different vehicle application.
| Configuration | Application-Specific Ratings & Specs | Driver Guidance |
|---|---|---|
|
Pressure Plate: Xtreme | Disc: Performance Street Sprung ACTSB10-XTSS |
Torque capacity: 598 ft-lb • Capacity over OE: 68% • Disc material: Organic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Xtreme • Feel: Moderate to heavy pedal effort, smooth positive engagement, OE to mild gear rattle, confidence during hard shifts • Recommended use: Recommended for street and race use | Smoothest engagement; preferred for primarily street-driven vehicles. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Xtreme | Disc: 6-Pad Race Rigid ACTSB10-XTR6 |
Torque capacity: 766 ft-lb • Capacity over OE: 115% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Xtreme • Feel: Moderate to heavy pedal effort, aggressive engagement, increased gear rattle, confidence during hard shifts • Recommended use: Recommended for race use only | Aggressive race engagement, with more modulation than a 4-pad disc. Rigid hub gives direct response with greater drivetrain shock/noise. |
|
Pressure Plate: Xtreme | Disc: 4-Pad Race Rigid ACTSB10-XTR4 |
Disc material: Race/puck-style friction disc • Pressure plate: Xtreme | Most aggressive puck-style engagement; competition-focused. Rigid hub gives direct response with greater drivetrain shock/noise. |
|
Pressure Plate: Xtreme | Disc: 6-Pad Race Sprung ACTSB10-XTG6 |
Torque capacity: 766 ft-lb • Capacity over OE: 115% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Xtreme • Feel: Moderate to heavy pedal effort, aggressive engagement, OE to mild gear rattle, confidence during hard shifts • Recommended use: Recommended for high horsepower street or race use | Aggressive race engagement, with more modulation than a 4-pad disc. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Xtreme | Disc: 4-Pad Race Sprung ACTSB10-XTG4 |
Torque capacity: 766 ft-lb • Capacity over OE: 115% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Xtreme • Feel: Moderate to heavy pedal effort, aggressive engagement, OE to mild gear rattle, confidence during hard shifts • Recommended use: Recommended for high horsepower street or race use | Most aggressive puck-style engagement; competition-focused. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Heavy Duty | Disc: Performance Street Sprung ACTSB10-HDSS |
Torque capacity: 522 ft-lb • Capacity over OE: 45% • Disc material: Organic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Heavy Duty • Feel: Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle, confidence during hard shifts • Recommended use: Recommended for street and race use | Smoothest engagement; preferred for primarily street-driven vehicles. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Rigid ACTSB10-HDR6 |
Torque capacity: 668 ft-lb • Capacity over OE: 88% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Heavy Duty • Feel: Light to moderate pedal effort, aggressive engagement, increased gear rattle, confidence during hard shifts • Recommended use: Recommended for race use only | Aggressive race engagement, with more modulation than a 4-pad disc. Rigid hub gives direct response with greater drivetrain shock/noise. |
|
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Rigid ACTSB10-HDR4 |
Torque capacity: 668 ft-lb • Capacity over OE: 88% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Heavy Duty • Feel: Light to moderate pedal effort, aggressive engagement, increased gear rattle, confidence during hard shifts • Recommended use: Recommended for race use only | Most aggressive puck-style engagement; competition-focused. Rigid hub gives direct response with greater drivetrain shock/noise. |
|
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Sprung ACTSB10-HDG6 |
Torque capacity: 668 ft-lb • Capacity over OE: 88% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Heavy Duty • Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle, confidence during hard shifts • Recommended use: Recommended for high horsepower street or race use | Aggressive race engagement, with more modulation than a 4-pad disc. Sprung hub adds driveline damping and street tolerance. |
|
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Sprung ACTSB10-HDG4 |
Torque capacity: 668 ft-lb • Capacity over OE: 88% • Disc material: Ceramic • Disc diameter: 9.4 in / 240 mm • Input shaft: 1 • Pressure plate: Heavy Duty • Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle, confidence during hard shifts • Recommended use: Recommended for high horsepower street or race use | Most aggressive puck-style engagement; competition-focused. Sprung hub adds driveline damping and street tolerance. |
Configuration Details
Pressure Plate: Xtreme | Disc: Performance Street Sprung (ACTSB10-XTSS)
Notes: This product is applicable for the following applications, 2007-2007 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX STI Specifications Item Description ACT Extreme Performance Street Sprung Clutch Kit with Monoloc Product Weight (lbs.) 18.2 Torque Capacity (ft/lbs.) 598 Â Torque Capacity Over OE 68% Disc Material Organic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Xtreme Warranty 12 Months ( view details ) Description SB10-XTSS kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's Performance street discs are the most popular disc purchased. They feature premium organic materials
Pressure Plate: Xtreme | Disc: 6-Pad Race Rigid (ACTSB10-XTR6)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX STI Specifications Item Description ACT Extreme Race Rigid 6 Pad Clutch Kit with Monoloc Product Weight (lbs.) 16.4 Torque Capacity (ft/lbs.) 766 Torque Capacity Over OE 115% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Xtreme Warranty 12 Months ( view details ) Description SB10-XTR6 kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 6-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-trea
Pressure Plate: Xtreme | Disc: 4-Pad Race Rigid (ACTSB10-XTR4)
SB10-XTR4 kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines. Monoloc is a one-piece, direct replacement or upgrade to the standard, two-piece wedge collar and wire ring featured in pull-type clutches. The spring tension of the segmented retaining ring is carefully calculat
Pressure Plate: Xtreme | Disc: 6-Pad Race Sprung (ACTSB10-XTG6)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX STI Specifications Item Description ACT Extreme Race Sprung 6 Pad Clutch Kit with Monoloc Product Weight (lbs.) 18.5 Torque Capacity (ft/lbs.) 766 Â Torque Capacity Over OE 115% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Xtreme Warranty 12 Months ( view details ) Description SB10-XTG6 kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 6-pad spring-centered race disc features a spring-center construction to properly damp torsional vibrations
Pressure Plate: Xtreme | Disc: 4-Pad Race Sprung (ACTSB10-XTG4)
Notes: This product is applicable for the following applications, 2007-2009 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX STI Specifications Item Description ACT Extreme Race Sprung 4 Pad Clutch Kit with Monoloc Product Weight (lbs.) 17.2 Torque Capacity (ft/lbs.) 766 Torque Capacity Over OE 115% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Xtreme Warranty 12 Months ( view details ) Description SB10-XTG4 kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad spring-centered race disc features a spring-center construction to properly damp torsional vibrations f
Pressure Plate: Heavy Duty | Disc: Performance Street Sprung (ACTSB10-HDSS)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy spec.B 2004-2021 Subaru Impreza WRX/STI Specifications Item Description ACT Heavy Duty Performance Street Sprung Clutch Kit with Monoloc Product Weight (lbs.) 18.2 Torque Capacity (ft/lbs.) 522 Â Torque Capacity Over OE 45% Disc Material Organic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Heavy Duty Warranty 12 Months ( view details ) Description SB10-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's Performance street discs are the most popular disc purchased. They feat
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Rigid (ACTSB10-HDR6)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX/STI Specifications Item Description ACT Heavy Duty Race Rigid 6 Pad Clutch Kit with Monoloc Product Weight (lbs.) 16.4 Torque Capacity (ft/lbs.) 668 Â Torque Capacity Over OE 88% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Heavy Duty Warranty 12 Months ( view details ) Description SB10-HDR6 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 6-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-tr
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Rigid (ACTSB10-HDR4)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy spec.B 2004-2021 Subaru Impreza WRX/STI Specifications Item Description ACT Heavy Duty Race Rigid 4 Pad Clutch Kit with Monoloc Product Weight (lbs.) 15.9 Torque Capacity (ft/lbs.) 668 Torque Capacity Over OE 88% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Heavy Duty Warranty 12 Months ( view details ) Description SB10-HDR4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-trea
Pressure Plate: Heavy Duty | Disc: 6-Pad Race Sprung (ACTSB10-HDG6)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX/STI Specifications Item Description ACT Heavy Duty Race Sprung 6 Pad Clutch Kit with Monoloc Product Weight (lbs.) 18.5 Torque Capacity (ft/lbs.) 668 Â Torque Capacity Over OE 88% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Heavy Duty Warranty 12 Months ( view details ) Description SB10-HDG6 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 6-pad spring-centered race disc features a spring-center construction to properly damp torsional vibrations
Pressure Plate: Heavy Duty | Disc: 4-Pad Race Sprung (ACTSB10-HDG4)
Note: This product is applicable for the following applications, 2007-2009 Subaru Legacy Spec.B 2004-2021 Subaru Impreza WRX/STI Specifications Item Description ACT Heavy Duty Race Sprung 4 Pad Clutch Kit with Monoloc Product Weight (lbs.) 17.2 Torque Capacity (ft/lbs.) 668 Torque Capacity Over OE 88% Disc Material Ceramic Clutch Disc Diameter (Inches) 9.4 Clutch Disc Diameter (Millimeters) 240 Input Shaft Diameter (inches) 1 Pressure Plate Type Heavy Duty Warranty 12 Months ( view details ) Description SB10-HDG4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad spring-centered race disc features a spring-center construction to properly damp torsional vibrations fo
Fitment note: Confirm model year, engine, transmission, flywheel, and related clutch components before ordering.