I did it the bass ackwards way because when I got my bumpers there were channels made out of pieces of a license plate, I didn't know any better and figured you couldn't get the right pieces so I made new channels (used more substantial steel though) and used screws and ground down the heads so they would be flush (so they would fit into the little "U" shape of the channel, I then put the channels on the rubber strip and positioned them so they would line up with the holes in the bumper. Since the bumpers were off it was easy to get a really tight and straight fit.