This performance tuner provides up to 60 hp to the wheels (80 hp crank) on a completely stock car, and up to 100 hp to the wheels (120 hp crank) on a fully modified car. It features a simple plug-n-play installation harness and includes built-in deletion of hidden "tuner detection" codes, so when you remove it, there's no trace it was ever there. Other features include a buttery smooth new CANbus-based integrated boost control system; hot/cold oil temperature protection; progressive methanol integration; water pump remapping; gear-dependent boost control/traction assist; and more. Free firmware updates can be downloaded using a Windows laptop and a BMS USB cable. The JB4 does not require any user setup -- customization is possible for more advanced users, but the average enthusiast can simply install and enjoy. And it is compatible with all ECU versions.
In addition to performance mapping, the JB4 features several "on the fly", user-selectable maps including a 100% stock bypass map, a 4500rpm rev limited valet mode, a progressive methanol map, a race gas map, and an rpm-by-rpm user adjustable map. Plus, unlike other flash and piggyback tuners that charge you per map and are restricted to your BMW's VIN, the JB4 is 100% unlocked, meaning you get access to every new feature/release free of charge.
This racing part is only to be used with competition race vehicles operated on a closed course.
Not for sale in CA.
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Everything we sell comes with a minimum 12-month warranty and a 100% satisfaction guarantee. In addition, products that carry the Bavarian Autosport brand come with a minimum 2-year warranty against defects in materials and workmanship. (Some have lifetime warranties!) If you are unhappy with a product's quality or performance, simply let us know. We'll make it right. Call us at 800.535.2002 or e-mail [email protected].