k04 1.8t?

hi, i have an a6 1.8t, want a bit more out of it, k04 seems to be the thing to do bringing power up to around 230hp, but does anyone know what boost pressures it runs at? i have a non-standard 20 psi intercooler here, wondering if thats enuf?
also is there any extra plumming needed to oil feed etc?

just want to know how involved this is

apparently 1.8t brakes r still good for these upgrades, any one know this? or agree or should i be looking for some brake kit, the 2.7t kit is pretty expensive, i think around £2500 (yes i'm in the uk) which i'd guess is around $3500, i hear APracing can custom build them for half that, i'm sure plenty of you will know this, thanks

rjet