Unlock serious performance from your 4.4 litre S68 V8 with the JB4 plug-and-play tuner for BMW XM, X5M and X6M. Supplied by Nforcd in the UK, this Burger Motorsports JB4 piggyback tuning box delivers proven gains of around 125whp on pump fuel and up to 260whp with higher octane or E85 blends, without opening the ECU. It installs cleanly, is fully reversible, and works even on locked ECUs, making it a powerful remap alternative for S68 owners.
- Plug-and-play installation with no cutting or splicing, fully removable and not VIN locked
- Preloaded S68-specific JB4 software with up to 8 selectable maps, including ethanol compatible tuning
- Smartphone control via the JB4PRO app with Bluetooth connectivity for live data, logging, map switching and firmware updates
- CANbus and OBDII integration with electronic wastegate control, built-in diagnostics and read or clear fault codes
- Adjustable boost by gear for 1st, 2nd and 3rd to help optimise traction and launches
- Runs smoothly in day-to-day driving, retains factory safety systems and typically leaves fuel economy unchanged
- Rugged billet aluminium enclosure, Made in the USA with a 5 year manufacturer warranty
Vehicle compatibility
- BMW XM G09 2023+ 4.4L S68, including 2024+ XM Label
- BMW X5M F95 LCI 2024+ 4.4L S68
- BMW X6M F96 LCI 2024+ 4.4L S68
Nforcd knows the JB4 platform inside out and it has been a popular choice with our S68 customers seeking a fast, flexible upgrade with big headroom. Choose the map to suit your fuel and modifications, monitor up to 40 parameters in real time, and enjoy substantial performance gains with the convenience of a reversible install.
Ready to transform your BMW? Order your JB4 from Nforcd today. Professional fitting is available at Nforcd in Warwickshire. To request a fitting quote, email Sales@nforcd.com.