Anyone else in the snow belt experience an exhaust leak on the top of the muffler from road salt? I have a 2002 w/ 40k on it, and the dealer said there is a small leak on the top of the exhaust, because I noticed the muffler has sounded louder. Is this a common problem? I want to know, because if it is, I would rather just get a stainless steel aftermarket exhaust like the WS II rather than pay for an OEM that is going to have the same problem in the long run.