Hello, I bought an Audi 80 with a 2-litre machine and 90 hp today. The car is EZ 08/94 and currently still has Euro 1 (E2). I would like to change that. I have already informed myself a little bit. Basically there are two possibilities, cold running controllers and minicat. Due to the price I tend to the latter rather, especially since this should not cause problems in the engine run, which is probably sometimes the case with the KLR. In another forum I also read that one can have this carried free of charge from a certain year of construction at Audi? Can I almost not imagine… I am a bit over-examined at the moment, which is probably better and whether the TÜV acknowledges this at all, if one installs a KLR or minicat itself. Because partly I have read that this is only recognized if this is installed by a workshop. I am just somewhat unsure based on the multitude of information that partly contradicts what I should do now. Can someone give me a more precise information?