JB4 for Lexus LX 600 & GX 550 3.5L Twin Turbo (BETA)

Power gains of up to 75hp on a stock vehicle without the risks of flashing!

Now includes the JB4PRO adapter and free app built in! The JB4 is the most advanced and highly featured tuning system available for your 2022-Present Lexus LX 600 3.5L. Power gains are up to 60hp to the wheels (75hp crank) on a completely stock car on pump gas, gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher.

No ECU flash needed and compatible with locked ECUs

The JB4 features a simple plug and play installation harness for easy installation & removal and includes many features not found with any other tune. Including on the fly in dash map switching between factory and various performance maps, boost limiting by gear for improved traction in lower gears, built-in data logging, built-in code reading, and much more.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but for those who are interested in logging, adding new features as we post them, changing maps, etc, we suggest the BMS DATA cable or the Bluetooth mobile phone adapter.

Optional JB4 MAP Sensor Bypass Extensionsavailable here.
These plug and play connectors simplify the installation and removal of JB4 and other piggyback systems by allowing you to bypass the difficult to reach upper rear MAP sensor by attaching the connections to each other.

Wirelessly Connect to your JB4:Our all-newJB4 PROsmartphone connection is included to wirelessly connect the JB4 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.

For more information