yes you need to remove the 2 larger bolts and the small torx on the underside or in my case inside of the rail. The bolts have plastic sleeves and didn't have any sealant on them, but probably would hurt to use somewhat's the easiest way to get the oem cross bars? pop off cap, remove small torx on underside. do I need to remove the 2 t40 or whatever they are bolts? just making sure before I get started. if I remove those large torx bolts I need sealant right?