This flywheel is perfect for race situations where you need quick acceleration and reliable engine response. It's designed for car enthusiasts and racers who want to upgrade their Subaru or Saab vehicles. The flywheel is made from heat-treated forging and has induction-hardened ring gears, ensuring long-lasting performance. Its one-piece construction helps with heat transfer and reduces the risk of failure. It's been forged, CNC machined, and computer balanced for smooth operation at high RPMs.