BMW B58 JB4 Tuner (Gen 1 & Gen 2) - Burger Tuning Select:JB4PRO Adapter (Uses Free JB4PRO App) Everyone knows that high heat

Everyone knows that high heat is the enemy of your automatic transmission

it provides significant performance gains without requiring complex modifications

Top Outer Diameter (OD): 9

and Nexsys Motorsports

BMW B58 JB4 Tuner (Gen 1 & Gen 2) - Burger Tuning Select:JB4PRO Adapter (Uses Free JB4PRO App) Everyone knows that high heatPower 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