JB4 Tuner

The Burger Motorsports JB4 Tuner is the ultimate performance upgrade for your S55-powered BMW, offering a seamless transition from stock to full race performance with the convenience of a steering wheel button. This plug-and-play module installs and removes easily without splicing or cutting factory wires. It is compatible with factory flash maps, competition package maps, off-the-shelf maps, and custom tuned maps. For enhanced optimization, Burger Motorsports provides free back-end flash maps to maximize performance based on specific builds and fuels. The JB4 features a wide array of advanced capabilities including user-adjustable 1st and 2nd gear boost limiting for improved traction, electronic wastegate control, and support for ethanol fuel mixtures up to E85. It also includes built-in CANbus diagnostic tools, allowing it to read and delete fault codes, and display or log up to 40 engine parameters. The tuner controls exhaust flap operation on supported vehicles and offers smoother operation than basic chip tunes, running as smoothly as stock while being compatible with all driving modes. Performance gains are substantial, with claims of 80whp/100tq on pump gas and up to 120whp/140wtq on higher octane or E85 blends, leading to improved 0-60 and quarter-mile times. This product is designed and assembled in the USA and comes with a 5-year warranty. It also features a 5-year warranty and a Lifetime Replacement Program. However, it is not for sale or use in the state of California on any pollution-controlled vehicle, as per the California Air Resources Board regulations.