I had a full exhaust, one piece header pipe muffler system on my Heritage. everyone that heard them liked the sound of them, except me. they were too loud for my taste. they looked good, but the HD stock header pipe heat shield didn't cover all the way down to the muffler and in time yellow discoloring was visible on the end of header pipe just before the muffler. other than that goof looking pipe with plenty of growl to them. great power with these pipes. lost some low end without crossover pipe.