People seem to quote pretty massive power figures on here, for example an RB20 pulling 200rwkws on its standard turbo, with a fmic and thats more or less it... even though you run out of spark after 13ish psi..... I've got a hi flow and all the usual backup stuff, and have just managed 200kws out of it....
But the hiflow has great response, and seems to get along great.. RB25 would crack with one I'd reakon...