I'm thinking about TRYING to TIG weld my own pipes. I was also wondering about where I can buy just the muffler canisters. Another thing, what are the materials of most motorcycle piping? I know automobiles are usually 321 or 304 Stainless for high quality piping, but I don't know what kind of metals the motorcycle piping usually are. I have 250DX (max 300amp output and watercooled torch) TIG welder and it should be able to weld almost anything. I have welded aluminum, steel, and SS steel. I have yet to try titanium.