Action Clutch Stage 2 Super Copper Clutch Kit (1SC) for 2004-2021 Subaru WRX STI (2.5L)

Fits 2004-2021 Subaru WRX STI and Impreza WRX STI models (2.5L Turbo AWD).

The Action Clutch Stage 2 Super Copper Kit (1SC) is engineered for drivers who need a higher heat threshold than a standard organic clutch can provide without sacrificing smooth street engagement. This kit is built for tuned street cars and basic bolt-on builds that see occasional track use in circuit, time attack, or road racing environments. By utilizing an organic friction material with the highest copper content available, this kit delivers superior grip and thermal stability over OEM components.

Each kit features a reinforced steel-backed disc for increased burst strength and is paired with a heavy-duty single diaphragm pressure plate to handle increased torque loads. To ensure long-term reliability, Action Clutch utilizes a patented fully enclosed spring retainer system. This design prevents the common failure of springs popping out, which can lead to catastrophic transmission or engine damage. Every kit is hand-assembled and undergoes multiple quality checks to verify performance tolerances.

• High-copper organic friction facing for superior heat tolerance and friction coefficient
• Reinforced steel-backed sprung disc increases durability for high-RPM shifts
• Patented fully enclosed spring retainer system prevents spring ejection failures
• Heavy-duty single diaphragm pressure plate provides increased clamping force
• Ideal for street-driven vehicles with basic bolt-on modifications
• Manufacturer Part Number: 1SC