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Action Clutch Chromoly lightweight flywheel for 2004–2021 Subaru WRX STI 2.5L (EJ257) Turbo AWD is a reduced-mass replacement that sharpens throttle response and enhances engine feel for street and racing use. Heat-treated chromoly construction tested to 18,000 RPM offers increased durability and improved thermal capacity; the unit is resurfacable to extend service life. Reduced mass may increase NVH compared with stock.
Action Clutch 04-21 Subaru WRX STI 2.5L (EJ257) Turbo AWD Chromoly Lightweight Flywheel
