Looks like you are making a blower inlet elbow for the TVS cars. Does this also include Roush Blowers or is this just for gt500 TVS? If so, have you seen 20-40hp on this application?
It will slightly increase boost, but not noticeable. At lower boot levels, figure about 20-30hp/tq, more as you go higher in booost. 9.5psi is still very mild. You will also hear the blower whine a lot more.