"Somethign wrong with it" some ricer thinking he can get away with gutting the cat, cutting his springs, removing muffler, putting in dumass blue bulbs that dont give out f all light etc etc. A cops not gonna go crawling around under ure car on the side of the road, all he has to have is suspicions and he can slap on a yellow sticka, thats what they are for. Well unofficially.