Paul - at the wheels, but remember, power seems to be one of those often argued terms on the web
Here in the states, approx. 400 whp on a Dynojet, for example, is very often seen, from a stock bottom end, from a variety of forced induction kits. How that translates to your local dyno though is the variable of course.
Kits like the Power Enterprise, Turbonetics, APS, Vortech, etc are all designed in their base form, for stock engines - power can of course go up on each one with the right supporting mods, etc etc.