[AP 997S]

I dunno . . . Maybe I'm way off base but don't you think Porsche, BMW, etc. w/ their huge engineering staffs would have incorporated a smooth walled intake hose if the hp gains are that significant. If you build hundreds or thousands of these hoses at the factory the cost would be ammortized over the entire build quantity so the manufacturing up cost would be minimal on per unit basis.

How about adding 'snake oil' to the fuel? That might increase hp even more.