What you said doesn't really make sense to me. You can't get a modular flywheel, because modular flywheels are once piece. You'll have to get a non-mod clutch to add a fidanza allum flywheel. which is much lighter, thus the reason for getting one. A lighter flywheel will allow you to rev the engine faster, but will result in lower gas milage and will be harder to get your car moving.