What is the specific problem with your exhaust? An exhaust can either be too loud or not have the appropriate emissions hardware. My guess is that yours is too loud, right?
If it's the noise issue... the cops can write you up for that one. Excess noise is illegal and pisses other people off.
There is probably a noise limit written into the local laws (I am not sure if its state or local law). You may be able to have your car noise level tested, and keep the paperwork with you.
However, this will cost money and why bother? Over the years, I have gotten more hassle for loud pipes than ANYTHING else, including my driving/speeding.
I have learned my lessons. Loud mufflers simply get you unwanted attention from the cops. Once they hear you, they will check you out for speeding, moving violations, or even just stop you to take a look around your car..... for equipment/emissions violations, the presence of booze, weed etc.
Frankly, why do you want to get the cops attention? Make your life easier and get a quieter exhaust.