Good evening- First of all, it is great to find this forum. I have participated on a number of other construction equipment related-forums on the Web but this one seems to be the best all around source of information for skid steer loaders. I have enjoyed reading the previous threads. I have a Model 630 with a bad muffler (Bobcat part number 6560582). I would like to cross the Bobcat part number with the part number at the original manufacturer, if possible. Is there a source of information somewhere that indicates the manufacturer for the mufflers on a particular model Bobcat skid steer and a way to cross the Bobcat part number? I have seen a few posts that indicated Donaldsen was one of the manufacturers but I believe I saw others as well. I have searched the web extensively but there is little info. Normally I can swallow my pride (and billfold) a little when buying parts directly from Bobcat, but $380 seems a little much for the OEM muffler on a 30HP Wisconsin. i also saw about having a custom muffler built, but the design includes internal piping between the manifold and the outlet (spark arrestor model), so doesn't seem that would be any cheaper than from Bobcat. Thanks in advance.