My 2002 Lexus ES300 sounds and runs fine (to me) but it won't pass inspection because of an exhaust leak. The dealer says that the leak is due to the corroded connection (flanges?) between the muffler and the pipe in back of it. They claim that the only way to fix the leak is by replacing both the muffler and the pipe, to the tune of $1000. I hate replacing parts that work just fine. Is there a way to somehow seal/fix that leak in the corroded connection, or am I stuck having to replace both the pipe and the muffler in order to pass the inspection? If it would be possible to just duct tape that, I'd do it, if you know what I mean.