SFI Billet Aluminum Flywheel, 6061 T-6, GM 1997-Up LS1/2, 168T, Internal Balance, 1045 SFP, CAD-designed and CNC-machined for strict tolerances and durability, Meets SFI safety standards, ensuring reliability in demanding conditions, Recognized at the 2006 Hotrod & Restoration Show as Best New Product, Inspected thoroughly throughout the production cycle for top-tier quality.