Reviews of doors that won't stay in place are true. A simple fix is to drill a third hole in the bottom center of the front flaps where they meet the factory fitted wheel arch covers and insert a rivet. I have used rivets designed for plastic kayaks and these flaps will never fall off. Drill two holes in the rear fenders in the same manner and rivet them back to the factory fitted wheel arch covers. A 3M tape on the valves is not enough to prevent sagging. Don't let that put you off buying these flaps. They fit great and look great on the truck. They will look factory installed when you are done. Kayak rivets cheap Revain. A $10 rivet gun should be in every tool box.