DESCRIPTION

The ACT Mod Twin 225 Xtreme Duty Sprung Race Twin Disk Clutch Kit for the 2004-2021 STI is built for high-powered AWD applications that demand aggressive launches and fast, consistent shifting. This modular twin disc system uses dual ceramic friction surfaces paired with a sprung Mono-Drive hub to deliver very high torque capacity while helping reduce driveline shock and extend input shaft life.

An exclusive four-stage heat-treated diaphragm provides a light, consistent pedal feel, while puck-style ceramic friction plates offer a high friction coefficient and excellent heat capacity for race conditions. The kit includes a CNC-machined, dynamically balanced flywheel and is fully rebuildable, making it a durable long-term solution for competitive use.

WHY?

This clutch is designed for STI owners competing in drag, road, or rally racing who need maximum holding power without sacrificing control. The ceramic twin disc setup delivers aggressive engagement and quick shifts, while the sprung hub and balanced components improve reliability under repeated hard launches and extreme heat.

FEATURES:

• Predictable, aggressive engagement

• Light pedal effort with quick shifting

• Dual ceramic friction surfaces for very high torque capacity

• Sprung Mono-Drive hub to reduce driveline shock

• CNC-machined and dynamically balanced flywheel

COMPATIBILITY

2004-2021 STI

SPECIFICATIONS