I've been pulled over several times but never cited. In just about every case, however, it was late at night. So, I figure they're just profiling and looking for a reason to pull me over to make sure I'm not drunk.
The laws (in Florida at least) are very unclear about the legality of such exhaust, but the cops like to use the "If it isn't from the factory, it's illegial" approach. I don't even want to think about the costs, time, and work it would take to get a stock exhaust again
-Ducky