Fidanza aluminum flywheels are engineered in house, from scratch, to deliver faster throttle response and quicker acceleration through lightening the rotating mass of the transmission components. Shifting becomes faster and more predictable as well as increasing heat dissipation characteristics to improve clutch efficiency and longevity. Fidanza flywheels are strong, lightweight, and cut from very high quality aluminum blocks. Steel friction surfaces are replaceable. This means you never have to replace the flywheel completely if you are changing the clutch system. Apply a new friction plate to the existing flywheel and it's like a brand new one. From the factory, the flywheels are balanced and inspected to ensure your car has zero problems with running a different flywheel than stock.