TBR header pipe?

[opticat]

I have the Two Brothers carbon duals installed in my SM and absolutely love the difference in performance over a stock can, and like this setup even more than the Hindle I had on my SE. I was at the dealer today for the 600 mile check and noticed another Spyder with the same TBR exhaust system. On his, however, the header pipe was seriously discolored to a point where it was, at least to me, an eyesore. It looked as if it were chromed and the chrome was flaking. But I read where the TBR pipes have stainless steel headers, and it seems impossible that the pipe could get in that condition if it were indeed made of polished stainless steel.

Any theories? Just want to be able to take some preventative measures on mine.