for anyone who did a custom turbo, what kind of bolt (type of material) and thread size did you use to bolt up the turbo to tha manifold?? Here is my set up if it helps:

01 integra ls
drag manifold
garrett t3/t04e (4 bolt)

 

uhm u can use heat treated bolts if you want to.

usually just bolts that fit u can use.. heh