are jspec engines good?

[mitsukid124]

well right now im just lookin into everything cause i don't know a whole lot, but im willing to spend the money to make things nice. i wouldn't mind making 350 to 400 horse, which i know i'd have to eventually upgrade my turbo setup, and get it tuned like crazy.

any estimates of how much it would be to do all that to the internals?

and what aout some uggestions for a turbo setup upgrade?