Cusco Lightweight Flywheel Subaru BRZ / Toyota 86 / Scion FR-SSuper Light Chromoly Flywheel This flywheel is designed and machined precisely for even rotation, delivering a balanced drive train even at low revolutions. RESPONSE Since the flywheel is much lighter than the factory unit, your engine will feel much more responsive when revving and climbing through the RPM's while accelerating. Depending on the application, the lighter flywheel is less for the engine to rotate, making it easier to keep the engine in