Quote Originally Posted by VXD959 View Post
What is that section?
Can I just replace that section?
Should I replace the whole muffler?
Yah, that's your flex pipe. They do eventually wear out & they aren't OEM specific. Just about any muffler shop will have one on hand that'll work so don't go searching around for an Isuzu one.

Failure of the flex pipe should NOT be considered to indicate that the muffler is shot too. Whilst they are putting the new flex pipe in though they can check to see if your muffler is in need of replacement.