Hi there!
I own a 2000 Audi S4 Biturbo with a 8D0907551D ECU
A friend also owns an S4 Biturbo. I haven't scanned his ECU yet so I don't know the exact model.
If it was the same, is there a possibility to copy his tuning to my car?
His car has a Sportec Tuning on it (Sportec is a professional Swiss tuner)
As soon as I will have scanned his car I will post all galletto files here, just for your reference.
Thanks for your inputs!

Agreed.

Read this;
http://www.nefariousmotorsports.com/wiki/index.php/Main_Page

Then read this again and again;
http://s4wiki.com/wiki/Tuning

Download tunerpro from the web, buy the plugin.

Read every last thread on here and go slow..... good luck!

Fwiw, my A4 had 17x,xxx miles on it. I paid to chip it before I found Nefmoto. It still makes me smile, and it now reads 215,xxx. No problems, and I drive the piss out of it.

When I look back at what my GIAC tune was doing in my logs, I cringe that I ran the car on that tune for so long.  It really is inexcusable.  But as long as the car is faster, 99% of their customers won't know any better.  I wouldn't go back to a professional tune ever again unless it was specifically tuned for my car alone.

Terrible fuel trims.  Super aggressive timing regardless of conditions... to name a few.