Description
The Burger Tuning JB4 for BMW S68 4.4L engines delivers jaw-dropping performance gains of up to 125whp on pump gas and as much as 260whp on higher octane or E85 blends. Designed specifically for the 2023+ BMW XM and 2024+ BMW X5M and X6M models, the JB4 tuner offers a seamless upgrade path from factory stock to full race-level performance.
Installation is quick and clean — no splicing or cutting of factory wiring — making it easy to remove without trace or damage. The JB4 includes unique features like user-adjustable boost limits by gear, electronic wastegate control, advanced CANbus diagnostics, and wireless smartphone integration, putting you in complete control of your vehicle’s tuning and performance.
Key Features & Benefits
- Up to 125whp gains on pump gas, up to 260whp on higher octane or E85 fuels
- Enhances 0-60 mph acceleration and 1/4 mile times
- Preloaded with up to 8 custom JB4 maps tailored for different fuel types and modification levels
- Ethanol (E85) compatible tuning maps included
- Reads and clears fault codes
- Real-time viewing and logging of 40+ engine parameters via JB4 smartphone app
- Boost limiting by gear (1st, 2nd, and 3rd) for optimal launch control
- Compatible with JB4 Mobile and JB4PRO wireless adapters
- Plug & play installation—no ECU flashing or permanent wiring changes
- CANbus OBDII integration for advanced tuning and diagnostics
- Maintains smooth, factory-like drivability across all driving modes
- No impact on fuel economy during normal driving
- Requires 91 octane fuel or better for max performance gains
- Not VIN locked—removable and transferable without trace
- Durable billet aluminum enclosure for protection and longevity
- Proudly made in the USA with a 5-year warranty
Vehicle Fitment
BMW X5M
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2024+ S68 F95 BMW X5M LCI 4.4L Twin Turbo V8
BMW X6M
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2024+ S68 F96 BMW X6M LCI 4.4L Twin Turbo V8
BMW XM
- 2023+ S68 G09 BMW XM 4.4L Hybrid
- 2024+ S68 G09 BMW XM LABEL 4.4L Hybrid
What is the JB4?
The JB4 is an advanced, plug & play performance tuner that installs between your BMW’s sensors and ECU, intelligently manipulating boost, timing, and fueling for significant power gains while preserving drivability. With industry-leading CANbus integration, wireless smartphone connectivity, ongoing free firmware updates, and versatile tuning maps, the JB4 has been the benchmark for turbocharged vehicle tuning worldwide for over a decade.
