These upgraded preassembled windshield headers installs quickly and easily! Just attach your Brief/Island Topper and place the header channel on the top of your windshield, slide the clamps onto the supplied knobs and clamp the channel in place. That's it! The channel is now securely held in place and ready for summer wheeling. No drilling or modifications required! Note: Will work with Bestop and other aftermarket summer tops. No Drill Windshield Header are required for installation of Pocket Briefs and Island Toppers