This DIY was a life saver. Just want to add one detail to the "It's easier to just remove all of the hangars from the car, rather than muscle the red poly bushings off of the catback while lying on your back" step. Removing those bushings is REALLY hard... unless you have WD40 (or the right tool, mentioned above). I tried for a good 30-40 minutes to get it off with leverage, bare hands, and several flat head screw drivers (like an idiot). A couple of sprays of WD40 and all the bushings pulled off with only moderate bare hand effort.
While the above posts also reference an E10 reverse torx socket, I never felt the need, as the standard (5/16", i think) socket hooked in with no problems.