actuator will control your boost and stop the car from over-boosting (if set correctly).
hks fcd will let your car boost on past the cars "safe limit of boost"..
remember that fueling mods are needed with the fcd.
this has been covered lots of times - use search button!
ah good chap urself,wel if ur not to sure on given advise dont give any!!wat happens if the info was wrong?fuck the chaps car up,ur only on the site mr no it all.