Hey guys...newbie here...with a "newbie question. I have a 2000 t/a a4 and i'm changing the OS to an '02 stock version i got from holdencrazy.com., and after i got that done, i realized that guys are then changing to COS 3 or COS 5....what does that mean? can i do it? and is there a sticky or anything on how to go about doing this? appreciate the help guys!!!
Justin