Probably I'm talking from a bad experience view point, but in my opinion is not advisable to buy chips from abroad. I once purchased a chip from Evolution Engineering UK for my Q4, and when I install it, the car runs pretty bad. Of course, Barry, from Evo Eng, is a really honest chap and he send me back the money invested. So, that's not the issue. The main thing is that the only way to have a chip installed with certain guarantee is if made in your place or near your place by a mechanic of yours. In my case, I end up chipping my Q4 in Buenos Aires, and I'm really happy with the mod....the car fliesssssssss!!!!