Just wanted to let everyone know that I just installed the Borla Cat-Back system on my 2010 hemi sport, 4wd, Factory trailer hitch and it fits and sounds awsome. They say it fits the 2006 but it will fit the 2010. The factory exhaust was 2 3/4" whereas the borla is 2 1/2" but I figure since the borla exhaust is straight through and has a muffler half the size of the old one and no 2nd muffler, I figured it will be ok. Everything lined up perfect and fits perfect. The sound is not bad at all inside like some people seemed to think it would be without the resonator. The outside sound is worth every penny.