I just got my truck saturday, 07 NNBS RCSB 5.3 and I was looking under it today and found this piece. Is the some kind of 3rd cat?

Driver side look toward passenger side
http://i138.photobucket.com/albums/q257/dabdou1970/Picture001.jpg

directly under passenger looking up
http://i138.photobucket.com/albums/q257/dabdou1970/Picture002.jpg

it;s a flex joint, to stop vibrations

cool, thanks.

hey i gotta trans am just like that one!

that on is my brothers. drop in k&n, unknown muffler, exhaust tips and lots of dirt, lol..

yeah, it's a flex joint to stop exhaust noise....

how well can those flex? that may be just what i need to finish my exhaust.

Can they hold a bend? or are they just to reduce vidbration?

interesting!

It also lets the engine move under load without putting stress on the exhaust.