Description
Delivering power gains of up to 40 horsepower and 70 lb-ft of torque to the wheels on a stock Fiesta ST, the JB4 from Burger Motorsports is the ultimate plug-and-play tuning solution for your turbocharged hot hatch. Whether you're driving the 1.6L EcoBoost (Mk2) or the 1.5L EcoBoost (Mk3), the JB4 enhances performance by dynamically adjusting boost pressure, ignition timing, and fuel delivery—without requiring an ECU flash or permanent modifications.
Advanced Hardware for Smooth, Powerful Performance
Equipped with a high-speed 64MHz processor and dedicated 10-bit digital-to-analog converters, the JB4 samples sensor data up to 800 times per second for precision tuning and smooth, responsive power delivery. The JB4 includes an integrated CANbus system to intelligently analyze parameters like throttle input, gear position, fuel trims, air/fuel ratios, and more to optimize performance on the fly.
Smart Safety Features:
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Boost is kept low until the engine reaches safe operating temperatures
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Automatically switches to low boost mode during overheating, knock events, or lean conditions
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Read and delete diagnostic fault codes using the app or data cable
Multiple Maps & Custom Tuning Options
Preloaded with up to 8 performance maps, the JB4 supports 91 octane, 93 octane, and E85 fuel mixtures. It also includes stock and valet modes. On-the-fly map switching is supported via the optional JB4 Bluetooth Adapter or BMS Data Cable.
Key Features & Benefits:
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Gains up to 40HP and 70TQ on stock vehicles
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Improved acceleration and 0–60 times
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Supports boost-by-gear for 1st, 2nd, and 3rd gear
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Fully compatible with all factory driving modes
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Real-time engine monitoring with up to 40 live parameters via the JB4 app
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Fault code reading/clearing and data logging capabilities
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Fuel economy remains unchanged during normal driving
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Made in the USA with rugged billet aluminum enclosure
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5-year warranty and free USA shipping
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Not VIN-locked—can be removed and resold
Wireless App Support (Optional):
Enhance your tuning experience by adding a Bluetooth connection:
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JB4 Mobile App (by DMAC): Offers advanced logging, map switching, security features, and customizable gauge themes. App sold separately ($29).
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JB4PRO Bluetooth Adapter & App: Our latest in-house design, fully enclosed inside the JB4 unit for better weather protection. Free app with intuitive layout, help buttons, and log analysis.
Vehicle Fitment:
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2013–2017 Ford Fiesta ST 1.6L I4 Turbo (Mk2)
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2018–2023 Ford Fiesta ST 1.5L I3 Turbo (Mk3)
What Is the JB4?
The JB4 is the most advanced plug-and-play tuning system for turbocharged vehicles. Unlike typical performance chips, the JB4 integrates with your car's CANbus and ECU sensors to deliver real-time, adaptive tuning. Backed by years of development, frequent free firmware updates, and support for mobile devices, the JB4 sets the standard for safe and powerful aftermarket tuning.
Whether you're chasing faster lap times or just want more fun on your daily drive, the JB4 delivers the performance, reliability, and features that serious enthusiasts demand.
