ESCRIPTION

The ACT 4 Pad Sprung Race Clutch Disc (part 4240518) is a direct replacement for 2006–2021 Subaru WRX and 2004–2021 Subaru STI models. Built with high-quality ceramic friction materials and a heat-treated spring steel drive plate, this 4-pad spring-centered race disc is optimized for smaller clutch sizes where heat capacity and durability matter. Heavy duty torsional dampening springs reduce driveline shock while retaining the aggressive engagement and quick-shift characteristics racers expect. This disc holds roughly 28 percent more torque than typical organic materials and is recommended for race use only.

WHY?

Choose this replacement disc when you need a durable, race-ready option without buying a full kit. It’s purpose-built for aggressive starts and frequent shifting in smaller-displacement setups, offering improved heat capacity, stronger torque holding compared with organic discs, and torsional damping that helps protect drivetrain components during hard launches.

FEATURES:

• High-quality ceramic friction material

• Heavy duty torsional dampening springs

• Heat-treated spring steel drive plate

• Holds approximately 28 percent more torque than organic discs

COMPATIBILITY

2006+ WRX

2004-2021 STI

SPECIFICATIONS