ACT Heavy Duty Performance Street Disc Clutch Kit 2004-2021 STI

DESCRIPTION

The ACT Heavy Duty Performance Street Disc Clutch Kit is designed for the 2004–2021 Subaru STI and combines high clamp load with durability for aggressive street and track-driven builds. This kit features ACT’s Heavy Duty pressure plate, engineered with an exclusive diaphragm design to increase clamp load while reducing deflection and extending clutch life. The 4-pad spring-centered disc delivers fast, positive shifts with improved torsional damping for more controlled engagement under hard driving. Built to withstand high heat and repeated abuse, this clutch kit also includes ACT’s patented Monoloc release bearing system for improved alignment, smoother operation, and long-term reliability.

WHY?

This clutch kit is ideal for STI owners pushing increased horsepower who still want reliability and consistency during aggressive driving. The Heavy Duty pressure plate provides confident holding power without an overly heavy pedal, while the 4-pad spring-centered disc offers faster shifts and dependable engagement when it matters most. ACT’s Monoloc design further improves release mechanism longevity, making this a proven solution for high-performance street cars and race-focused builds alike.

FEATURES:

• Designed for the 2004–2021 Subaru STI

• Heavy Duty pressure plate with increased clamp load and reduced deflection

• 4-pad spring-centered disc for faster shifts and improved durability

• Aggressive engagement with light to moderate pedal effort

• Includes ACT patented Monoloc release bearing system

COMPATIBILITY

2004-2021 STI

SPECIFICATIONS