At first, I was unsure of the potential gain and wary of the technology being detected by the dealer. Needless to say that Elton assured me of the converse on both. The difference after the conversion is crystal and much better than any competitor’s offering. I have never driven a diesel that is so responsive. All my friends compliment me on the performance of the car. There is no way that I am going back to my old file!! I have also had my car in twice for a service at the Audi dealership and nobody has noticed that there are few extra horses under the bonnet!! Thanks Elton for a super job. I have already recommended EuroSpeed to all my friends who drive a turbo engine.