BMW B58 JB4 Tuner (Gen 1 & Gen 2) - Burger Tuning Choose vehicle:Gen1 B58 *** CARB APPROVED *** Pump flow 72psi (5bar): 3

Pump flow 72psi (5bar): 3

Finally once complete press and hold the stage selector button until all lights turn off to save the calibration

• More airflow than the restrictive factory airbox• Better turbo sound

This is a complete plug & play kit to install a Bluetooth ethanol sensor in your 2021+ M440i

BMW B58 JB4 Tuner (Gen 1 & Gen 2) - Burger Tuning Choose vehicle:Gen1 B58 *** CARB APPROVED *** Pump flow 72psi (5bar): 3Power 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