ACT Xtreme Duty Performance Street Disc Clutch Kit (SB10-XTSS) | Subaru STI 2004-2021

The ACT Xtreme Duty Performance Street Disc Clutch Kit (SB10-XTSS) is engineered for 2004–2021 Subaru STI owners who demand reliable, high-performance clutch engagement for both spirited street driving and moderate track use. This Xtreme Duty kit delivers superior holding capacity, smoother engagement, and consistent pedal feel allowing drivers to confidently push their STI without sacrificing drivability.

KEY FEATURES

• Xtreme Duty clutch disc engineered for high-torque applications while maintaining smooth engagement on the street
• Improved clamp load for consistent pedal feel and reduced slippage under high load
• Includes high-quality pressure plate, clutch disc, and release bearing for a complete, direct-fit kit
• Designed to handle upgraded engine performance and moderate track use without compromising daily drivability
• Durable friction material engineered to resist heat fade and maintain long-term performance
• Direct-fit replacement installs using factory flywheel bolt pattern and stock release system

TECHNICAL SPECIFICATIONS

• Platform Compatibility: Subaru STI 2004–2021
• Clutch Type: Xtreme Duty Performance Street Disc Clutch Kit
• Included Components: Clutch disc, pressure plate, release bearing
• Torque Capacity: 550 lb-ft (verified for SB10-XTSS configuration)
• Horsepower Support: Up to 600 HP (verified for SB10-XTSS configuration)
• Material: High-performance friction material and heat-treated pressure plate for durability
• Installation: Direct-fit replacement; uses factory flywheel bolt pattern
• Performance Benefit: Improved pedal feel, reduced slippage under load, consistent engagement for both street and light track use

VEHICLE FITMENT

• Subaru STI 2004–2021

ACT delivers proven, data-driven performance solutions engineered to optimize your Subaru with unmatched precision and reliability.