ACT XT-M/Race Sprung 4 Pad Clutch Kit – 2006-2026 Subaru WRX

ACT Xtreme Race Sprung 4-Pad Clutch Kit for the 2004-2021 Subaru WRX STI

The ACT Xtreme Race Sprung 4-Pad Clutch Kit for the 2004-2021 Subaru WRX STI is engineered for the EJ257’s higher torque output compared to the WRX. The ACT Xtreme pressure plate provides the correct clamp load for this application and the 4-pad spring-centered ceramic race disc is matched to the use case: high-power mixed street/track STI builds.

DETAILS

• Pressure plate: ACT Xtreme
• Clutch disc: 4-pad spring-centered ceramic race disc with Xtreme pressure plate
• Use case: high-power mixed street/track STI builds
• Fitment: 2004-2021 Subaru WRX STI EJ257

Maximum Xtreme clamp with spring-center 4-pad ceramic. Some compliance retained.

The STI’s EJ257 engine makes more torque than the WRX EJ25T, and the clutch selection needs to account for that. ACT’s STI-specific kits use the correct pressure plate and disc sizing for the larger disc diameter, ensuring the clamp load calculations are right for this application.

What’s in the Box

• ACT pressure plate
• ACT clutch disc
• Hardware and alignment tool
• Installation instructions

Why Choose ACT

Advanced Clutch Technology has been manufacturing performance clutch systems in the United States since 1993. Every ACT pressure plate uses a proprietary diaphragm design that increases clamp load and reduces deflection compared to OEM units, and every diaphragm goes through a four-stage heat-treating process before it leaves the factory. The result is a clutch system that holds more power than the stock unit, engages more precisely, and lasts longer under the kind of driving that wears factory clutches out quickly. ACT designs each application from scratch rather than modifying OEM tooling, which means the fitment is precise and the performance is intentional. Whether the build is a street-driven daily driver or a dedicated track car, ACT offers a kit at the correct specification for the use.

The RallySport Take

The ACT Xtreme 4-pad Sprung race kit is the correct choice for builds that see both track and street use. The ceramic pads provide the heat capacity you need for sustained hard driving, and the spring-center hub construction damps the torsional shocks that rigid discs transmit directly to the drivetrain. ACT’s wraparound spring window design and thicker retainer stampings make the spring center more durable under repeated hard engagement than standard designs. The result is a clutch that performs like a race disc at the track and does not punish you for driving home afterward. Fits Subaru applications 2004-2021.

Fitment