How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness and built in deletion of hidden "tuner detection" codes. Compatible with all ECU versions.
In addition to our 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 for those interested an rpm by rpm user adjustable map.
Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization.
Due to DME compatibility issues we do not offer and have no plans to develop an N55 JB4 tune for the X3, X5, or X6. The most powerful tune you can use for these models is our N55 Stage1.
JB4 support for the F10 & F30 is limited and does not yet include in dash features. Follow along on N54Tech for the most current updates.