It will stay on with just double-sided tape, but the first time you run across any accumulation of snow it will be gone. That being said, its so cheap that I'm not sure I will screw it on even with that knowledge.
I figure for $15 I am not going to care what happens to it. Mine is already looking pretty ragged. It is still on but has been scrapped up pretty bad. If it starts coming off I will just help it come all the way off and clean up the edge until Spring.
it shouldnt. its just 3m tape'd on there.. doesnt effect anything.. if they do think of voiding it because of the lip, u gotta find a different dealership to do business with.