i got a new muffler from a friend of mine, a dynomax xl (for turbo) and was wondering how much an exhaust shop would charge to just hang it and weld it in? no piping is needed...............

Probably $20 or less. Unless their assholes.

yea its pretty easy to do, for a turbo z tho you should really consider a cat back, but if you are trying to save money i would stay away from meinike or other places like that, they will charge around 80-120bucks for a simple muffler