[dsraven]

exhaust is kinda tough, room wise, but better out the back for keeping things looking nice, paint etc. oxides of nitrogen in the exhaust tend to accel the oxidation of any bare metal from rock chips etc. heat tends to warm up diff housings. never been a fan of out the side or turned down under the unit but, out the side maybe better if not out the back. just my thoughts though. out the side tends to put a coating on things like wheels and fenders.