Developed with Factory Yamaha, Pro Circuit, Factory Kawasaki of Europe, Factory KTM and top pros like Jeremy McGrath, Sebastian Tortelli and many othersSpecially designed reed cage now comes with carbon fiber Pro Series reedsMaintains flow velocity through the valve and redirects intake charge for even distribution to intake portsPull a gear higher on uphills; instant acceleration makes passing effortlessMade of one-piece aluminum casting and bolts in easily; no modifications necessaryNOTE: Rad Valve is stamped with PART #.