I'm going to take the pipe off sometime to apply a coating to the thermal wrapping. I need a new stud on the turbo too. We used the stock Silverado Duramax exhaust piping for it (3.5") and mandrel bent. We needed a 90*, and the rest of it was just cut, hammer and weld.
I'll have to get sound clips sometime soon, as well as video.
It's actually 10x quieter inside the cabin as compared to open 3" downpipe that exited at your feet.