Originally Posted by eagletangogreen
Yes you would, the stock ecu would control all other functions, the piggy back would control the fuel and timing tables... Question is whos sell a piggy back system? Form what I have been told and read the BMW software cannot be adjusted like how everyone in the world does.. I am about to give up on this car as far as tunning it, and leave it as it is..
I do not think that there is anyone yet. I talked to the local AEM rep and he did not seem to be too enthusiastic. Only option so far is the static flashes provided by some vendors.