I have the 4" duals, with 5" tips. They look great, sorry no pics yet. I have the 3. 73 rear gears, and the muffler is supposed to be the DPPI model, straight through with the little louvers. It is not much louder than stock, just a lower tone, until you get on it hard. Then it sounds off, but for the most part, cruising, I don't hear much more than it sounded stock.