For sale is 2 month old RaceChip ultimate tune for X3 or X4 with 35i engine.
Switched to a 3 plug tuning solution after adding a catted downpipe. This tune worked flawlessly and smooth, but new tune is more aggressive and so a better fit for my downpiped car. If staying stock, this tune for me was much better than the stage 1 JB which I had for over 2 years in my X3, much smoother power delivery and this tune you can adjust boost easily with a dial inside the box.
Switched to a 3 plug tuning solution after adding a catted downpipe. This tune worked flawlessly and smooth, but new tune is more aggressive and so a better fit for my downpiped car. If staying stock, this tune for me was much better than the stage 1 JB which I had for over 2 years in my X3, much smoother power delivery and this tune you can adjust boost easily with a dial inside the box.
RaceChip Ultimate for N55
