06-07 HARLEY FLHX2: Vance & Hines Naked VO2 Air Intake For those wanting to keep the stock look, but not necessarily the stock performance, Vance & Hines now offers its VO2 Air Intake as a high flow replacement kit for use with your stock air cleaner cover. Utilizing a sleek dual-port venturi machined from billet aluminum, the VO2 Naked is a direct bolt-on to the factory throttle body. Combined with its high-flow washable filter element, the VO2 Naked air intake kit produces strong performance gains across the entire power curve when paired with Vance & Hines Fuelpak and Twin Slash Staggered exhaust system or Competition Series slip-on The VO2 Naked can be run with no cover, allows reuse of the O.E.M. cover (unless noted), or dress it up with one of the many optional VO2 Skullcap covers (sold separately).