It's nearly impossible to keep side mirrors and the small canards and other front winglets on, so I don't think removing them is an issue. Shaving down the splitter in Box Stock is another matter (which is why I have run bodies that don't come with one) and I think would violate the rules as written, but I don't plan to call anyone out on it unless it seems egregious and provides a clear unfair advantage. There have only been a handful of racers at any point in time and the racing hasn't been close enough to make body modifications an issue, but if we get to that point we will have to deal with it.