Our 2012 S-car has 38,000+ miles on it. We are in Wisconsin so any exhaust leakage should be evident in the cold. It has gotten quite loud, like a gutted muffler, the last few months, but I am unable to detect any exhaust leakage. All the noise appears to be coming from the muffler outlet pipe. I suppose it could be the flex pipe, but I would think I'd see some exhaust coming from there (which I don't). Any comments or suggestions? Karl