Power gains of up to 50whp and 70wtq on a factory vehicle without the risks of flashing!

Now includes the JB4PRO adapter and free app built in! The JB4 is a plug and play tuner that 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 normal driving is unchanged and compatible with all driving modes, including towing.

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 are not able to even monitor this critical engine data, no less incorporate it in real-time into their tuning algorithms. The JB4 provides huge power increases with unparalleled power delivery.

The JB4 includes multiple maps for 91 octane, 93 octane, factory tuning, VALET mode, 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 to your JB4: 

Grab our all-new JB4 PRO smartphone connection to wirelessly connect the JB4 BMW tuner to your Bluetooth 4.0 compatible iOS or Android device. This option allows 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.

Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns.

For more info on how to use the JB4PRO free app click here.

JB4 Features and Benefits

• Power gains of up to 50whp and 70wtq on a factory vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 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
• 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
• 5 year warranty

Vehicle Fitment

• 2022+ Ford Maverick 2.0L I4 EcoBoost
• 2025+ Ford Maverick Lobo 2.0L I4 EcoBoost
• 2025+ Ford Maverick Tremor 2.0L I4 EcoBoost
• 2022+ Mondeo 2.0L I4 EcoBoost

DYNO RESULTS

Bronco Sport 2.0L Turbo Dyno (same engine as the Maverick)