Description
ACT Mod-Twin Clutch Kit – 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 |
|---|---|---|
|
Standard Configuration ACTT1S-S05 |
Torque capacity: 700 ft-lb • Capacity over OE: 97% • Disc material: Organic • Disc diameter: 8.8 in / 225 mm • Input shaft: 1 • Pressure plate: Heavy Duty • Feel: Soft progressive engagement, light pedal effort, smooth shifting with OE to mild transmission gear noise • Recommended use: Street or Street/Strip | Smoothest engagement; preferred for primarily street-driven vehicles. Sprung hub adds driveline damping and street tolerance. |
Configuration Details
Standard Configuration (ACTT1S-S05)
Specifications Item Description ACT Mod-Twin 225 Heavy Duty Sprung Street Clutch Kit Product Weight (lbs.) 28.1 Torque Capacity (ft/lbs.) 700 Â Torque Capacity Over OE 97% Disc Material Organic Clutch Disc Diameter (Inches) 8.8 Clutch Disc Diameter (Millimeters) 225 Input Shaft Diameter (inches) 1 Pressure Plate Type Heavy Duty Warranty 12 Months ( view details ) SFI 1.2 Description T1S-S05 Mod-Twin 225 HD Sprung Street Kit is designed for high powered AWD street cars. It unites uncompromised pedal feel, durability, engagement quality with very high torque capacity by combining twice the organic friction surfaces with an ultra-durable spring center Mono-Drive hub in a completely modular design. Each diaphragm spring endures an exclusive four-stage heat treating process providing a consistent light pedal feel. Steel-backed Friction Plates with high quality organic friction materials deliver stable friction coefficient, good heat capacity and long clutch life. These Friction Plates unifo
Fitment note: Confirm model year, engine, transmission, flywheel, and related clutch components before ordering.