Ok first off don't laugh..... We have a 48in Scag Super Z It only has about 900 hours on it. We just put on new engine on it, do to my mother not being to smart and not keeping up and the oil but that is another story. Well we put a new B&S 16hp VanGuard back on it Model Number 303777 and we also picked up and Super Z Bagger Model # GC-SSZ-6kh that our dealer had left in it's stock from back in the late 90's....Well the Vangaurd Muffler will not let the bagger fit on, I have called around and everyone is like this is the muffler that belongs to that engine so this is what need to be used. Well it just will not work that way and I need to know if it really matters what kind of muffler I use..We are in the peak of leaf season here in Columbus and I want to get this thing on!!!!