2000 S80 T6 almost 170 k miles - I noticed the sound of exhaust leak, did a quick visual check and notice that the 2 front pieces (resonator?) that are connected by a short pipe show signs of rust, the one closer to the rear has the outer shell seperated on one side from rust. I think this is where the noise is coming from. The last piece (muffler) before tail pipe looks ok. All these pieces are welded together; what is the repair process? Have muffler shop cut the bad pieces and re-weld? What will this cost?
Thanks