CANbus OBDII integration offering unrivaled tuning features and performance.

The JB4 offers a lot more performance, functionality, and safety than your average performance chip.Preloaded with custom BMW tuning software and up to 8 maps for various fuel and modification levels.N54 Power gains of up to 100hp and 100tq to the wheels on a stock vehicle.Note: This item is not CARB (California Air Resource Board) exempt and is not legal for sale or use in the state of California. A separate JB4 Mobile app purchase is also required. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable.

Whether you're racing a 100% OEM car on pump gas or a 700whp single turbo drag queen, the JB4 has the perfect mix of performance, features, flexibility, and support to ensure your car performs to the best of its potential! Made in the USA. As you decide to modify your car further the JB4 is set up to grow with your vehicle. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. Remember the JB4 does not require any additional modifications or previous stages. Other features include optional in-dash gauges for boost and other engine parameters, a programmable shift light, on the fly adjustable torque limiting to aid with launches at the track, an optional 2STEP rev limiter & no lift shifting for manual transmission cars, an optional speed delimiter, and much more. In addition to several performance maps which can be selected 'on the fly' right from the driver's seat the JB4 includes a 100% stock bypass map, a valet mode, ethanol fuel (E85) support, progressive water/methanol injection support, racing fuel map, an auto-tuning map that adjusts the JB4 mapping to your current climate, octane, vehicle condition, and modifications continuously, and for those interested in an rpm by rpm user adjustable map. It's everything you need to take your N54 powered vehicle from mild to wild. How about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types.

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