Fidanza flywheels are made from the high quality 6061 T6 aluminum, the material is great for strength, heat dissipation and of course reduction in weight. Fidanza flywheel can mate with any type of clutch material, including OE, organic, kevlar, ceramic, metallic and sintered iron. Fasteners are military grade aerospace material and ring gears is made from 1050 steel and heat treated for durability. Designed to deliver racers the power and performance they seek