Gains are 104whp on pump gas and up to 198whp on higher octane or E85 mixtures. The ultimate tune for your 2016-2022 G12 BMW M760Li xDrive V12. The JB4 allows you to go from factory stock to full race and everywhere in between.

The JB4 includes many unique features not found in any other tune, including user-adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol fuel support, and built-in advanced CANbus-based diagnostic tools. Installation is easy and completely removable with no splicing or cutting of factory wires making the JB4 an excellent choice for your V12 engine.

Wirelessly Connect to your JB4: Our all-new JB4 PRO smartphone connection is included and wirelessly connects the JB4 BMW tuner to your Bluetooth 4.0 compatible iOS or Android device. This option allows you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development.

Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns.