I had many exhaust leaks in mine. where the flanges are welded to the pipe is where ALL of my leaks were, every single one needed re-welding (much cheaper than replacing everything!

otherwise it may be one of the gaskets in between the flanges.

all it takes is a tiny hole to make noise!

Oh and none of them were noticeable visually until I unbolted it from the car, then I found the problems !

mine is quiet again.

Sportage sold.........
1999 4runner 4x4 , Tundra brake rotors and calipers (well worth it!) -wifes