I just did a 6 spd swap was looking on gettimg a ECU s8 file or possible change coding. The next step is turbocharging, before i gett in to it would like to see if i would be able get any kind of help on tuning the ECU. I already built a 00 A6 4.2 6spd turbo 03 S8  engine i had to install a haltech bacause couldnt find anyone to tunne or get help in tuning it and it was a nightmare i would love to keep all the  stock features. I'm new in this game but very interested in learning Any help would be participated thanks