Fidanza Lightweight Aluminum Flywheels are designed and built for performance, CNC machined from the highest quality 6061 T6 or 2024 T3 aluminum. Each flywheel is manufactured to deliver maximum tensile strength, heat dissipation, weight reduction and, reliability. Fidanza Lightweight Aluminum Flywheels are balanced and thoroughly inspected for quality and fitment every time and include military-spec fasteners, stepped steel dowels, heat-treated ring gear and, grade 8 button screws.