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The Action Clutch Stage 1 (1OS) kit for 2004–2021 Subaru WRX STI (2.5L EJ257) is aimed at stock to basic bolt-on cars. It combines a steel-backed copper Kevlar organic friction material with a single diaphragm heavy-duty pressure plate to provide smooth, OEM-like engagement and roughly 70% more holding capacity than factory while maintaining street drivability and reliability.
Action Clutch 04-21 Subaru WRX STI 2.5L (EJ257) Turbo AWD Stage 1 Clutch Kit (1OS)
