Oh dont go buying a 4 bar sensor its not just plug and play , ile be pushing between 150 and 180bhp from my tdi , a 3 bar one would be more than enough but going ott with everything... youd need to speak to stealth as sure the fueling would be way off if you wanted to upgrade to a 3bar sensor and the voltage to pressure map would need tweaking to allow for the larger map sensor if not youd be over fueling/boosting..
TPS or Darkside for new Genuine map sensors