Action Clutch ACR-1812 Stage 4 Single Disc Clutch Kit for Subaru WRX EJ255

The Action Clutch ACR-1812 Stage 4 Single Disc (1MD) Clutch Kit is engineered to withstand the demands of high-performance driving in the 2006–2014 Subaru WRX equipped with the 2.5L DOHC EJ255 turbocharged AWD drivetrain. Built for enthusiasts who push their vehicles hard, this kit delivers maximum clutch holding capacity and aggressive engagement characteristics without sacrificing reliability.

At the core of this kit is a heavy-duty single diaphragm pressure plate paired with reinforced drive straps and an Unsprung MIBA Ceramic clutch disc, available in a 4-puck or 6-puck configuration. The ceramic disc construction is specifically chosen to maximize grip and durability under high-load conditions, making this kit ideal for low-to-mild horsepower modified applications and dedicated performance builds.

Key Features:

• Stage 4 Performance Design — Maximum torque holding capacity for modified EJ255 turbo applications
• Single Disc Configuration (1MD) — Balanced performance with reduced rotational mass compared to multi-disc setups
• Heavy-Duty Diaphragm Pressure Plate — Reinforced construction with heavy-duty drive straps for extreme durability
• Unsprung MIBA Ceramic Disc — Available in 4-puck or 6-puck; provides quicker, more positive engagement
• OEM MPN: ACR-1812

Important Notes: Ceramic-based clutch discs are designed to increase holding capacity and durability, not to extend service life like an OEM friction disc. Initial clutch chatter is normal and will minimize after proper break-in. This kit is not recommended for stock or lightly modified engines used primarily for daily street driving, as frequent slip-style engagement can accelerate wear. A proper break-in period of 500 street miles is required — keep RPMs under 4,500, use no more than half throttle, and avoid boost during break-in.

Selecting the correct clutch stage for your vehicle's power output is critical. Installing an incorrect stage for your application can result in premature clutch failure or transmission damage. Professional installation is strongly recommended.