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Action Clutch Stage 2 (1SC) for 2004–2021 Subaru WRX STI (2.5L EJ257) is the Super Copper option for street and occasional track use. With a high-copper organic facing and reinforced steel backing, it increases heat tolerance and grip over OEM, pairing a heavy single diaphragm pressure plate for smooth engagement suitable for tuned street cars and basic bolt-on builds.
Action Clutch 04-21 Subaru WRX STI 2.5L (EJ257) Turbo AWD Stage 2 Clutch Kit (1SC)
