mods in sig - 400rwhp/360rwtq @ 7psi. w/o custom tune.
custom tune would net another 50rwhp.
you could make around 500rwhp @ 10psi with a custom tune, but your living on the edge of the stock rods/pistons.
most vobras (vortech cobras) I've seen around here make around 425rwhp @ 10-11psi with custom tunes.