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This Action Clutch retrofit Chromoly lightweight flywheel fits 2017–2021 Honda Civic Si 1.5L (L15B7) turbo conversions and is built for durable, high‑RPM use. Heat‑treated chromoly construction has been validated to 18,000 RPM, providing lower rotational inertia, improved throttle response and strong heat tolerance. The flywheel is resurfacable to extend life; reduced mass may increase NVH in some setups.
Action Clutch 17-21 Honda Civic Si 1.5L (L15B7) Turbo Retrofit Chromoly Lightweight Flywheel
