Just finished putting my "craigslist special" exhaust on tonight. It's 4" pipe, no muffler, and sounds great. Paid $60 for 2 4' lengths of pipe, 2 45 degree elbows and then bought the reducers locally.
cool but i dont think it would be good for the tires if towing, Hulling up a pass in mid summer warms up the tires pretty hot, Now having 900* EGTs blowing on them cant be good