DESC: Fidanza Flywheels are made using the highest quality and most modern materials available. The flywheel itself is made from either 6061 T6 or 2024 T3 aluminum depending on the model. Both of these materials are tempered aluminum which are very, very strong yet very lightweight. The friction surface is very special. Fidanza uses a 1050 high carbon, alloy steel. This alloy is perfect for this use. It is incredibly durable allowing the use of just about any clutch disc material available from organic to Kevlar and even sintered iron. Fidanza attaches the friction surface using aerospace nuts and bolts or 304 stainless steel rivets depending on the application. These are some of the best fasteners money can buy. Fidanza chose them because of their incredible shear strength and resistance to corrosion. All Fidanza ring gears are heat treated for durability. They are heated, pressed on and then secured using grade 10 fasteners. You will not find better materials but keep reading be