Description
JB4 Performance Tuner for 2015–2024 Ford Mustang 2.3L EcoBoost
Unleash the true potential of your 2.3L EcoBoost-powered Ford Mustang with the JB4 Performance Tuner, the industry’s most advanced plug-and-play tuning solution. Engineered to deliver exceptional horsepower and torque gains while preserving factory-like drivability and safety, the JB4 transforms your Mustang’s performance without the need for permanent ECU modifications.
Featuring E85-compatible maps, real-time engine monitoring, CANbus integration, smartphone-based tuning, and a rugged billet aluminum enclosure, the JB4 provides unmatched tuning flexibility and cutting-edge functionality. Whether your Mustang is bone-stock or lightly modified, the JB4 takes its acceleration and responsiveness to a whole new level.
Key Features & Benefits
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Gains up to 60whp and 100wtq on an otherwise stock Mustang EcoBoost
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Noticeably quicker 0–60 mph and quarter-mile performance
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Includes 8 custom JB4 maps designed for multiple fuels and upgrade levels
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E85 ethanol-compatible tuning maps for maximum output
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Ability to read and clear fault codes directly through the tuner
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Monitor and log 40+ real-time engine parameters using the JB4PRO mobile app
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Boost-by-gear control for improved traction in 1st, 2nd, and 3rd gear
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Compatible with the FREE JB4PRO app for wireless logging, tuning changes, and adjustments
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Offers far superior performance and safety compared to generic plug-in chips
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Plug-and-play installation with no cutting, splicing, or ECU unlocking
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Advanced CANbus OBDII integration for precise tuning and smoother power delivery
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Drives like stock—OEM-quality smoothness with unchanged fuel economy during normal driving
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Fully compatible with all factory driving modes
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Requires 91+ octane for optimal performance gains
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Not VIN-locked—remove anytime without leaving a trace and resell freely
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Includes a durable billet aluminum JB4 enclosure for long-term reliability
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Designed and assembled in the USA
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Backed by a 5-year warranty
Vehicle Fitment
Ford Mustang 2.3L EcoBoost
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2015–2023 Mustang EcoBoost® 2.3L Turbocharged I4
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2024+ Mustang EcoBoost® 2.3L Turbocharged I4
What Is a JB4?
The JB4 is a sophisticated plug-and-play tuning platform designed for modern turbocharged engines. Installed between critical engine sensors and the factory ECU, it safely adjusts parameters such as boost pressure, ignition timing, and fueling to deliver significant, reliable power gains. Unlike basic performance chips, the JB4 utilizes high-speed CANbus data, integrated fuel and spark control, Bluetooth connectivity, and extensive logging capability to provide a level of tuning precision unmatched by traditional piggybacks.
With regular free firmware and map updates, the JB4 continues to evolve—offering new features, refined performance, and ongoing improvements. Its reversible installation makes it easy to remove without ECU flashing or detection, making it the perfect choice for performance enthusiasts who want power without permanent ECU modification.
Is the JB4 a Real Tune?
Yes. The JB4 offers tuning control comparable to an ECU reflash by adjusting boost, timing, AFR, and fuel trims in real time using CANbus data. It delivers smooth, safe, and substantial power gains while maintaining all factory safeguards—and does so without requiring ECU unlocking or leaving a digital footprint. This makes the JB4 the ideal tuning solution for Mustang EcoBoost owners seeking maximum performance with full peace of mind.
