[s-cars] Overboost cutting in and Stromung noise

[Mark G. Hahn]

  I just finished installing my S2 E.M. as well as my Europrice KKK/Garrett
T4OE/K26 Turbo as well as a complete Stromung exhaust. The car really
screams although the Stromung seems to have quite a bit of booming noise
until above 73-74 mph. Most of my drive is at 60-70mph so I may have to live
with it. My Stromung has been sitting in the garage for a year or so, do
they possibly have a new muffler out? Has anyone experienced this booming
noise with their Stromung? Have a new muffler welded in?
  My second and bigger problem is now I get a Overboost and the car cuts
out. The Vag Com reads this fault:
1 DTCs Found:
00544 - Maximum Boost Pressure Exceeded
        27-10 - Implausible Signal - Intermittent
Anyone have any ideas?  Thanks, MGH