Vance & Hines Naked VO2 Skullcap Crown Air Cleaner Insert (CHROME) Add a touch of class to your VO2 Naked Air Intake with a Vance & Hines VO2 Filter Skullcap. Styled with subtle creasing and a chrome mesh, the VO2 Skullcap consists of a single steel stamping that bolts directly over the air filter element.Single bolt mount.Fits all VO2 Naked applications.Vance & Hines signature logo stamp.Note: VO2 Skullcaps wi