Profile: Spec, Inc. specializes in offering cluthes and flywheels. Our performance clutch stage one features an integrally molded carbon kevlar-based, organic lining that offers smooth engagement. This lining has an integrally bonded steel backing for strength under high clamp loads and temperatures. The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability. It is ideal for street and many track/off-road applications. Tuned billet flywheels are manufactured and developed for specific driving environments and recommended based on how each car reacts to changes in rotating mass. These flywheels are not a one-fits-all lightweight flywheel, though they can be used for an array of driving habits and racing/high performance applications.