ok so i drive a 2001 mustang 3.8L V6. i have an aftermarket mid pipe and cat back. i realized it was making a weird farting sound today at low revs (idle - 3500). so when i got home a crawled under and took a look - theres a crack in the mid pipe where the catalytic converter meets the pipe that goes to the cat back (crack only on left side mid pipe). the crack is right where the weld used to be. will i need a new mid pipe or can this probably just be re-welded???