Pressure Plt 04-06 Yfz450Billetproof Pressure PlateComplete the "billet proof" clutch package CNC machined from a solid piece of aircraft quality T 6 billet aluminum and then Akadized for the highest level of reliability Provide a more rigid pressure plate to inhibit flexing with heat buildup Used by the world's most talented riders Made in the U. S. A. '14 and newer YZF450R models must use parts H198 and 1131 0855.