I've had the Jardine2 into one pipe on my 02 M/S since Feb. 02. The only discoloration so far is in the area where the header joins the exhaust pipe.That occurred almost immediatly but hasn't gotten any worse.
As for decibals,The pipe emits a nice deep rumble and definitely barks when I get on the gas, a plus when passing cars or trucks. The pipe was easy to mount also with no alteration, at least on my bike.
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