[twin turbo]

I have had the JB+ installed (at 100%) for approx. 7,500 miles. Car runs great and I can remove or reinstall the JB+ in about 2 minutes. Very easy in the Z4. Not as good as the JB3 for sure, but good power for very little money and effort. I have Bavarian Technic cable and have never found any hidden tuner codes on the ECU. I did have to have my fuel pump replaced, but I do not think it was related to the JB+. Happy tuning!