[Fulltiming]

Mine was missing when I purchased the coach. I talked to Newell about it at the time (2006) and was told that they used to hand build those units to fit the space available. Sorry I can't be of much assistance. Mine, like yours was just the end of an exhaust pipe dumping into the radiator area, I had a muffler shop weld an extension on which brought the end of the pipe down to the opening and dumping straight down onto the ground. It has worked well but if I were to drive on unpaved roads, which I try to avoid, it would blow dust up into the radiator as it doesn't extend past the outside of the rear cap.