[lkchris]

The mufflers changed in 2003 and both the base and the S from then on use the same muffler, just different bolt on "finishers," i.e. chrome tips. Before that there were separate mufflers for base and S and the tips were welded on. I don't know which later chrome tip style is the cheapest, but the cheapest is about $450 from Porsche. It looks very much like the '03-'04 complete muffler bolts right on to at least the '00-'02 models, but not positive ... and I think that's pretty much the only way to use one of the removable extensions such as the 550 version.