The truth is that no tuner knoledgeble enough to be able to overcome the throttle body shut down (at 1,3bar) would just bump the boost without this being part of a package. K16's won't even do 1,5bar so thats out of question but even a set of K24's won't be blowing nothing but hot air at those speeds, therefore not producing the power needed to do that kind of speed. Its got to be an hybrid set up with aftermarket IC's and if this was done by Sportec (the best known Porsche tuner in Switzerland) they would rebuild the engine with proper internals and most of all they would stand behind their work in case of disaster. Please ask your friend for details has we are all in suspense here!