Get a lawyer if you can. When you show up in court, they'll most likely issue a repair order forcing you to remove the exhaust, put an OEM one back on, and then get it inspected by some court officer, then mail in the inspection slip. This happened not once or twice but THREE seperate times to a friend with an Eclipse. Here in MD, the law is very vague about exhaust loudness, so he fought it and won. After winning the first case, he had a good general idea of what to do... I would advise fighting it, and starting asking around for legal advise. And if the muffler has a silencer, put it on!!