Clutch Masters FX1000 Twin Disc For 2J Eng w/T56 TransThe cover assembly is machined from billet aluminum and is then Type 3 hard anodized. Our billet covers have roughly 25% more tensile strength than the competitions cast unit. By focusing our ability on machining the strongest cover possible while maintaining minimal weight, we are basically able to eliminate any flex in the cover. Our billet covers see only . 003" of flex where as a cast or stamped unit can see as much as . 030" of flex. By