I've got a 3" single exiting in the stock location, but got an new over the axle tail pipe to lose the factory resonator on my '07 (and of course a polished 3.5" stainless tip
). I went with a 18" Magnaflow though, and love the sound. It's loud, but not obnoxious. Nice, deep tone down low and sweet modular V8 sound at the higher rpm's. I love it. Good luck with whatever set up you choose!