Steve, I thought it out wicked and came up with what we ended up doing. The turbo outlet is tiny, whoever doesnt like the idea has upgraged turbos long ago. The little j-pipe does the same tricks even a small mandrel {$$$$} bend would do, not to mention the {$$$$$} extra flange. Between the miniscul flow increases and what the extra cost would be {enough people still think 200 bucks is alot!!!???!!...For the upper and lower} {BTW Buschur charges 300 US just for the UPPER PIPE...ours is better} I left it alone that you can still upgrade turbos and leave the pipes alone.
Velocity is built in the j-pipe, more I.D would increase lag time {think about it} pressure, etc.
My lower pipe would put a smile on anybodys face. ...It works, its affordable.