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Fidanza aluminum flywheel for SR20DET J-spec (non-dual mass) swaps rotating assembly weight for quicker engine response. This billet-style aluminum flywheel reduces inertia compared with stock, uses heat-treated friction plate components, replaceable hardened 1050 steel ring gear, and military-spec fasteners for secure installation. It’s a common upgrade for enthusiasts seeking lighter reciprocating mass without inventing compatibility claims.
Fidanza SR20DET Jspec (Non Dual Mass) Aluminum Flywheel
