I got pulled for having a "defective exhaust" by a cop on my way to norfolk from VA beach.
He told me he heard me screaming down the street. Oddly enough, there was a ricey ass car that was ahead of me, with an oddly enough ricey exhaust but whatever.

When I went to court to fight it (knowing full well my exhaust wasnt stock, but not "defective" and certainly not screaming) all I had to do was tell the judge my exhaust was not defective, and that the cop could not prove otherwise being he didn't have a meter or any sort of gauge to compare my car too.

She smiled, looked at the cop and said "yeah, that would have helped" and dismissed it.

Cop was a dick (not for pulling me, but as an attidude he had when he did) Which prompted me to fight it.