PCI carries several Billet brackets for our intercoms, radios, RaceAir, GPS, antenna and other items. This guide will help you determine what size you need.Can Am X3 Perimeter Bars 1.85"Can Am X3 Rear Harness Bar 2.5" (On the 4 seater the front passenger harness bar is 1.85")Can Am Maverick and Commander 2"Polaris Top Cross bars and Perimeter bars 1.75"Polaris Rear harness and bumper crossbar 1.5" (Some models will have 1.75")Polaris RZR XP Pro 2" Roll Cage, 1.25" behind driver seatYamaha YXZ Cage 1.75"Yamaha YXZ Crossbars 1.5"Yamaha Rhino Perimeter 1.75"Yamaha Rhino Top Crossbars 1.5"Arctic Cat Wildcat 1.75"Honda Big Red, Pioneer 500 and 700 1.625"Honda Pioneer 1000 1.75"Honda Talon 1.25" and 2"Kawasaki Teryx Perimeter 1.875" / Top Crossbars 1.7"Speed UTV 1.75"