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This Stage 2 (1SC) Super Copper clutch kit for 2004–2021 Subaru WRX STI (2.5L EJ257) upgrades holding capacity using a copper-loaded organic disc and reinforced steel backing. It’s intended for street and occasional track use, offering improved grip and heat resistance while preserving smooth engagement for daily driving when combined with basic performance modifications.
Action Clutch 04-21 Subaru WRX STI 2.5L (EJ257) Turbo AWD Stage 2 Clutch Kit (1SC)
