Guess it depends on your definition of loud. I had a single glasspack on mine with stock cats and it was a good, cheap loud. Now I replaced both cats with on high flow, and a glasspack and it sounds pretty good.lol
btw glass packs aren't that loud if you just replace the stock muffler with one.
But then again I have both my cats. Its a very mellow rumble just slightly more then stock.