SPEC tuned billet flywheels are manufactured and developed according to how specific vehicles react to changes in rotating mass in particular driving environments. They are not generic one-size-fits-all lightweight flywheels--though they can be used for an array of driving habits and racing/high performance applications. All SPEC tuned billet flywheels are manufactured from only the highest quality steel and aluminum.

They are machined to industry-leading .001 in. tolerances ensuring a flat seating surface for the clutch and smooth rotational qualities for excellent balance, drivability, and extended clutch life.