BMW B58 JB4 Tuner (Gen 1 & Gen 2) - Burger Tuning Choose vehicle:Gen2 B58 JB4PRO rear mounted flex fuel kits

rear mounted flex fuel kits must use the universal harness

70x12 Phillips MAF screws

The maintenance process is simple

• Preloaded with custom JB4 GMC Canyon tuning software and up to 8 maps for various fuel and modification levels

Boost limiting by gear to enhance traction in lower gears

BMW B58 JB4 Tuner (Gen 1 & Gen 2) - Burger Tuning Choose vehicle:Gen2 B58 JB4PRO rear mounted flex fuel kitsPower gains of up to 120whp and 120wtq. on a stock vehicle without the risks of flashing! The JB4 is the most advanced and feature rich tuning system available for BMW's B58 engines, offering significant power gains, seamless integration, and unparalleled ease of use. With its plug and play design and innovative features, the JB4 transforms your driving experience without requiring additional modifications. Unlike traditional ECU flash tuning, the JB4