exhaust

Hey all, i was doing some exhaust work on my PA28R-200 with the IO360 C1C 200hp. I found this before I removed the shroud and am not sure if it was like this already before I started working on it. This is on the left hand side of the engine right below cylinder 4 riser/muffler. Is this a hose...

I have an exhaust system (muffler and headers) for a Lycoming 0-320 from a Cessna 172M sitting in my garage after a switch to a Powerflow muffler. Want to sell it, but have no idea what its worth. Its in great, used condition. Hoping to cover the cost of new interior bits so my interior doesn't...