I have seen on the internet about these plug in T-Boxes that simply plug into the wiring and it gives you extra 30+ HP. Does anybody know if these work or not, and do these invalidate the waranty and Can Audi tell if it is fitted or has been fitted. I have a A3 2.0 140bhp new model 07 plate, is the 170 model the same engine and if so what if any is the differance so i can get it changed.....
