> ...insulation on the pipe that is going from engine to muffler is damaged.
I'd guess you see the braiding over the flex joint is rotting off. When it
starts to leak (if its not already), either
- have the flex joint replaced at a muffler shop; or
- have the whole front pipe replaced. Get get a genuine Mitsu part unless
you want to pay about 60% more.

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Stewart DIBBS
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