Mustangrulez

Any recommendation for the quietest performance exhaust for my 2012 Ford Mustang GT. Every year I am adding one bit and this year is exhaust chance. I don't want any trouble with authority or get my car impounded for making too much doof doof, but I want to upgrade the exhaust system at the same time. I heard (not sure if its true) that such exhaust comes in the market that can control the exhaust noise decibel level from the switch of button to enable quiet / loud mode. Is it true guys...?