Getting a ticket does not necessarily mean you're guilty of the violation. It only means that you have to prove to the judge that you didn't commit the violation. That means taking time off of work and go down to the court. That is why I said the key is not go get the ticket in the first place. The only way to do that is to convince the Officer not to write one. That means you have to education him/her on the violation in question.
In the case of the exhaust, even if the law says 95db is the limit, I don't think any officer can tell you precisely what db each exhaust is giving out. Therefore, he/she have to rely on common sense and experience. In my case, it was obvious that the officer thought my exhaust was beyond the legal limit, but I proved him wrong by showing him the certificate and he let me go without giving me a ticket.
no ticket=no need to go to court=no need to take time off=no hassle.