I have a question for you. I just got a 2006 Sierra with Duramax. I want to get a 4" straight pipe exhaust, but don't want to have to put a Cat on it every year for inspection. If I get a PO box in say Payson, I can skip emissions? No way they can bust me? What about the yearly registration sticker for the plate? If I pay online would I need them to send the sticker/new registration to the PO Box? Thanks!!!
Garett