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The Stage 3 (1MS) kit for 2004–2021 Subaru WRX STI (2.5L EJ257) combines a sprung MIBA Ceramic disc, heavy-duty pressure plate, and reinforced components to deliver elevated holding capacity and faster engagement. It’s intended for owners seeking stronger control under spirited driving and occasional motorsport use, accepting some initial chatter that settles with proper break-in.
Action Clutch 04-21 Subaru WRX STI 2.5L (EJ257) Turbo AWD Stage 3 Clutch Kit (1MS)
