BMS BMW F90 F91 F92 F93 JB4 Tuning Box for M5 and M8
Unlock serious performance from your BMW M5 or M8 with the Burger Motorsports JB4 tuning box. This plug and play JB4 for BMW F90 M5 and BMW F91 F92 F93 M8 delivers proven, repeatable gains with factory-like drivability. Expect power gains of up to 80 bhp and 100 lb ft at the wheels on a stock car, smoother throttle response, and intelligent boost control through full CANbus integration. If you are searching for BMW M5 tuning box, BMW M8 tuning box, JB4 UK, F90 M5 tuner, F92 M8 tuner, piggyback ECU, or Burger Motorsports JB4 for S63 twin turbo V8, this is the upgrade enthusiasts choose.
Why choose the JB4 for your M5 and M8
- Power gains of up to 80 hp and 100 lb ft to the wheels on a stock vehicle
- Quick plug and play installation with no permanent modifications
- Advanced CANbus integration for unmatched tuning features and safety
- Runs as smoothly as stock and works with all factory driving modes
- Fuel economy unchanged during normal driving
- Compatible with JB4 Mobile for smartphone data logging and on-the-fly map changes
- Ethanol E85 compatible tuning maps for higher octane performance where available
- Read and clear fault codes directly through the JB4 interface
- Not VIN locked, removable without a trace and can be resold
- Made in the USA with a 5 year BMS repair warranty
At Nforcd we have fitted and used the JB4 extensively on customer and in-house cars. Feedback is consistently excellent on performance, reliability, and drivability. It is the ideal ECU remap alternative for BMW M5 and BMW M8 owners who want big gains with easy install, proven maps, and the flexibility to return to stock in minutes.
Compatibility
- 2018+ BMW F90 M5 and M5 Competition
- 2020+ BMW F91 M8 Convertible
- 2020+ BMW F92 M8 Coupe
- 2020+ BMW F93 M8 Gran Coupe
Engine: S63 twin turbo V8. Perfect for owners searching BMW F90 M5 tuning, BMW M5 Competition performance upgrade, BMW M8 Competition tuning, JB4 M5, JB4 M8, F90 tuning box, and Burger Motorsports piggyback.
How it works
The JB4 is a sophisticated piggyback tuner that interfaces with the vehicle via CANbus to precisely control boost, timing, and fuel for optimal performance. Multiple maps are available for different octane levels and hardware setups, including ethanol blends. With JB4 Mobile support, you can log data, switch maps, and make adjustments from your smartphone.
Fitting and support
Installation is straightforward thanks to the plug and play design. For professional fitting, we recommend booking with Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com and our team will be happy to help.
Part number
BMS037
Warranty
5 year Burger Motorsports repair warranty.
Images and performance logs
Dragy-verified testing and product images from Burger Motorsports show the JB4’s real-world performance potential on the F90 M5 platform.
Popular search terms
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