I need a couple studs and nuts for the exhaust flange on the turbo outlet that connects to the down pipe

 

I really hope this helps you sir

http://www.crateenginedepot.com/stor...rbocharger.pdf
^^I think 626 and 628 are what your looking for?

for everthing else:
http://www.crateenginedepot.com/stor...ings-C276.aspx

 

Negative I need 648 and what connects to 648. Also need a nut that fastens the air box to the body

 

GM does not sell our particular studs separately. I tried to get some when I put my downpipe on. They sell the whole O2 housing off the turbo as one unit with the studs in it. I said F that and went to Home Depot and got some galvanized bolts to replace all the studs.