BMS F8X S55 JB4 Tuner Chassis_E39 Wirelessly connect the JB4 to

Wirelessly connect the JB4 to your Bluetooth 4

Please have a professional shop assist with install

You can also define your own performance windows for measuring both trap speeds and/or elapsed times

SUPPLIED WITH:

i8 I15 i8 Roadster (B38X)

BMS F8X S55 JB4 Tuner Chassis_E39 Wirelessly connect the JB4 toGains are up to 80whp 100tq on pump gas and up to 120whp 140wtq on higher octane or E85 mixtures without the risks of flashing! The ultimate tuner for your S55 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between, with the push of a button on your steering wheel or phone. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and