well, heres a list of what things should never be on a grand prix because our cars are much too prestigious for all this:
your all welcome to add to this
1) 2 foot tall wings (obvious)
2) Fart can mufflers straight outta pep boys (sadly saw this the other day)
3) Body kits
4) 20 inch rims
5) Strobe lights
6) Obnoxious sound systems
7) stickers for import companies
8) vinyls
9) Stick on vents and hood scoops
10) Carbon fiber hoods, or spoilers (unless painted)
11) Lambo doors