Well it dose shrink but not enough to notice. Kinda like the older Corvettes they did the same thing over the years but there still here and look pretty good so far.
The reason I made the spoiler to fit to the bumper brackets instead of the bottom of the bumper is first of all I hate the idea of drilling holes in a nice bumper. And factory, aftermarket or refurbished bumper is never the same from what I've seen. I believe I left enough room so it should fit every bumper.
