[el ess A]

LEOs don't have to know what exhausts comes on every vehicle.

LEOs don't know who you are. They're main job is to keep the streets and community (includes you) safe. They also need to stay safe themselves.

LEOs should only be stopping a vehicle on reasonable suspicion or witnessing violations. We know not all do, but isn't there some A-holes in every job? Pray you get the professional and not the A-hole.

LEOs ask a question, then politely answer. LEOs are people and most of the time they respond in kind. Don't be a d*ck. You only would only want to clam up if you are afraid that you could hang yourself with loose lips.

First, know your laws and study up on them. If a LEO says your exhaust is too loud, make them prove it by asking the LEO if he/she's got a calibrated dB meter on him/her. If the LEO does, then ask that he/she measure it in accordance with the state/local ordinances (many places have them, but there's no national standard- usually it's some dB level from a certain feet away. Kansas is 90 dB max from 50 ft). If they don't have one, then ask them to cite you for it if they feel strongly about it. If they don't want to do that, ask is that all and can you leave?

Buy a cheap dB meter which will give you a good idea if you're approaching/exceeding legal dB limits. It's not scientific, but it gets you in the ballpark.