Power gains of up to 100hp and 120tq to the wheels on a stock Bronco without the risks of flashing!

This plug-and-play tuner attaches to two easy-to-access sensors in the engine bay and works with your factory ECU tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag.

Installation is very discrete, and unlike flash remaps, which are quick to install but can never be fully removed with a JB4, the vehicle is never aware it’s making more than the factory boost or power levels. Fuel economy during everyday driving is unchanged and compatible with all driving modes, including towing. The JB4 can auto-detect engine size and adjust tuning accordingly, making it compatible with the 2.3t and 2.7t models.

Unlike other less advanced systems, the JB4 includes CANbus functionality allowing it to take in critical engine data directly from the ECU for real-time tuning. The data includes pedal position, throttle position, timing advance, fuel trims, air/fuel ratio, engine knock, fuel trims, gear, and more. Other tuners without CANbus cannot even monitor this critical engine data; they can incorporate it in real time into their tuning algorithms. CANbus allows the JB4 to increase its power with unparalleled power delivery.

The JB4 includes multiple maps for 91 octane, 93 octane, factory tuning, E85 mixtures, and unleaded race gas. In addition, it offers boost-by-gear settings to improve launches, the ability to read and delete fault codes, and much more. The JB4 is made in the USA and includes a 5-year warranty.

Wirelessly connect the JB4 for the Ford Bronco 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. 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. Separate JB4 Mobile app purchases are also required.

JB4 Power Gains, Features, & Benefits

• Power gains of up to 100hp and 120wtq to the wheels on a stock vehicle• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 Ford Bronco tuning software and up to 8 maps for various fuel and modification levels
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• View and record up to 40 gauges/engine parameters in real time with the JB4 app.
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
• Exhaust flap operation can be controlled in most JB4 applications
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• CANbus OBDII integration offering unrivaled tuning features and performance
• Improved performance over non-integrated chip tunes
• Runs as smoothly as stock; this is how your vehicle should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• 91 octane fuel or better required for performance gains
• Not VIN locked and can be removed without a trace and resold down the road
• Includes the rugged JB4 billet aluminum enclosure for protection
• Made in the USA
• Free USA Shipping
• 5-year warranty

Vehicle Fitment

• 2021-Present Ford Bronco 2.3L and 2.7L Turbo
• 2022-Present Ford Bronco Raptor 3.0L V6 Turbo

What is a JB4?

The JB4 is a plug-and-play tune available for turbocharged vehicles. The JB4 tuner is installed between your car’s sensors and the DME/ECU (computer) and manipulates vehicle performance through these connections, making your vehicle much faster. While it’s not the only tuning system that operates this way, the JB4 separates itself from the competition with much more advanced connection points and processing, including CANbus, fuel & spark control, Bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates, adding performance and features as ongoing development allows. In addition, the JB4 system is not VIN-locked to your vehicle and can quickly be removed and swapped between cars or resold later. Often imitated but never duplicated, the JB4 has been the gold standard in plug-and-play turbocharged performance tuning for over a decade.

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