Connecticut has some odd MVD rules, among them no state inspection of any kind for motorcycles, which essentially means that anything goes. However there is a clause in the code that states the motorcycle has to have all of it's DOT required equipment intact, for the year it was built. It doesn't have to be OEM, if your motorcycle was sold in a year when turn signals were required, that it has to have signals of some kind.
As far as exhausts go they don't bust cars or bikes for loud exhausts as they have no way of accurately testing anything to DOT standards, a simple sound meter won't get through the courts here.
But if you're stopped for some other infraction and you give them any attitude what they will do is inspect your pipe to see if it has a DOT sticker certifying it for street use. If your bike was built after DOT muffler stamps were instituted, and the mufflers on your bike don't have that stamp, it doesn't matter if they're quiet as a mouse, you're getting fined. If it does carry a stamp, it doesn't matter how loud they are, you're going to skate.
It's weird wrinkle but actually works fairly well.