Here is mine (07 4.7L Limited) with a Magnaflow muffler, 5"x11"x22" Oval muffler 3"in/out.
That video is only with the muffler the day I got it, so it wasn't broken in.
This video is with my Muffler and a AFE Stage II CAI.
I love the sound of it now, only thing is that the 4.7L only puts out a WHOPPING 230 something horsepower. That's only 100 more hp than my 1995 4cyl YJ. I swear the sound of the exhaust and intake take off at least 2 seconds on my 0-60 time.