Fidanza Aluminum Flywheel - Supra JZA70 & Soarer JZZ30 - 1JZ-GTE EngineFidanza Aluminum Flywheel for Supra JZA70 & Soarer JZZ30 with 1JZ GTE Engine An aluminum flywheel is the easiest and most ecomomical way to increase a car's performance. Average aluminum flywheel weight is 55% less than the factory steel flywheel. This weight difference allows a vehicle's engine to use much more of its available horse power. Fidanza Flywheels are made of the highest quality components 6061 T6 aluminum 1050 high carbon alloy steel