Ok Guys here goes, With all this exhaust talk nobody has mentioned titainium. 
Before everyone goes loopy on me, let me mention that I have an all Ti 
exhaust on my gsxr Suzuki. While this exhaust was far from cheap, 
(retail 1500 bucks,) there are some real advantages. First; Ti doesn't 
corrode. It is similar to 300 series stainless in that reguard. Second; 
Ti has high temperature resistance, it's actually stronger at temp. Lastly; 
it is so light IT IS AMAZING. My entire 4 into 1 exhaust system including 
the muffler weighs 7 pounds. Welds similar to stainless. The exhaust on 
my bike is at least as complex as the Racing Beat turbo one if not more 
so. seems like we could make a good tangential or VAM out of it for 
less than the inconel systems. Tubing is available. What do you guys think? Bill Jepson

 
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