Just to be clear, I seriously doubt that there'd be any warranty issue associated with these particular mods, and while it's possible it was done to hide a problem, that's also not likely. It was probably just a "styled up" Genny and your salesman didn't even notice. I was just pointing out that there are people who don't really like 3rd party add-ons because they can potentially have such issues.
I'd still say you are pretty safe and if you like the look then you got it for free. If you don't like them, ask the dealer to take them off, shouldn't be a problem.
