The plan is to include everything needed to mount. This is one of the key reasons I used existing holes along the outside edges. It would use one extra screw there and the two screws for each "fin" on each side of the tailpipes.

My biggest issue is whether to make it cover the outside edge areas under the bumper skirt. By doing this, it is extremely well secured. Trimming it would be relatively easy to carbon coat but I don't think it will be as secure. Either way, my goal is to make it no more than a 30 min mod that could be done by any one easily.