We "turned" ours just before the rear bumper. Prior to that the exhaust was running thru the rear bumper and we were concerned that it would melt the plastic parts on the Jeep while towing. We made a turn or two which resulted in a turned down exhaust. Also got rid of a couple tiny holes in the pipe.
pic showing the big hole in the bumper the exhaust pipe previously passed thru. I think I will use it for the permanent generator/genturi exhaust.
After the "modification. This is the only pic I have of that part of the bus. If you look close where the bottom rub rail ends at the rear bumper you can just see the end of the exhaust.