I have 66k on my truck and I'm getting a really bad exhaust smell in the cab. From reading around and how strong it is I'm assuming that its a crack in the pipe. Just bracing myself as to what to expect...would the Y-Pipe be covered under the 5 year 100k warranty? I'm pretty sure its exhaust, could be a bit of a fuel but one time at startup a little smoke even came in the cab. Nothing crazy, just noticed it.