yeah im not really worried about that, in person you can see that along with being angled down one is angled in a bit and the other angled out a bit. It shouldnt be a problem Im just going to buy all the piping myself, cut it and tig it where need be to use as little couplers as possible.

Use aluminum piping all around, or steel instead?
also what size piping should I run? OD of the inlet and outlet are 2 1/2'', I think ID was something like 2 1/8-2 1/4''

Well only thing left is to determine the turbo still