XTD Flywheels are made using the highest quality, most modern materials available. These billet aluminum flywheels are typically just over half the weight of the stock iron unit. The effect of XTD's lightweight aluminum flywheels is like adding 15 hp to the wheels. Your vehicle will reach higher rpms quicker, due to a lighter rotating mass. For turbocharged vehicles, this also helps reduce turbo lag. These XTD flywheels are CNC-manufactured using 6061-T6 billet aluminum and are SFI-approved for performance applications. XTD's flywheels can be used with any type of clutch material, including organic, carbon,kevlar, ceramic, metallic, and sintered iron. These flywheels feature a replaceable friction surface insert that can be installed to eliminate having to purchase a new flywheel.