I need to replace the muffler on my Accord. My local independent Honda/Acura shop says they can do the standard "bolt-on" Honda muffler, but it would cost 0 installed. Does their term "bolt-on" mean the muffler could be replaced by a normal handy human being who does not have welding equipment, but who could order the part from one of the online parts houses? Or, is there any particular reason not to just use one of the aftermarket muffler shops at perhaps 0?