Description
JB4 Tuner for 2020–2026 Toyota GR Supra Mk5 (B58 & B48 Engines)
Unlock the full performance potential of your 2020–2026 Toyota GR Supra Mk5 with the industry-leading JB4 Tuner from Burger Motorsports. Engineered for both the 3.0L B58 and 2.0L B48 turbocharged engines, the JB4 delivers exceptional horsepower, torque gains, and advanced tuning features—all while maintaining factory-smooth drivability and OEM safety systems.
Designed as a true plug-and-play solution, the JB4 integrates directly with the vehicle’s CANbus and critical engine sensors to deliver real-time tuning adjustments. With gains of up to 80 wheel horsepower on a completely stock Supra, the JB4 dramatically improves acceleration, 0–60 times, and quarter-mile performance—without permanently altering your ECU or leaving a trace when removed.
Featuring up to eight preloaded maps, optional E85 ethanol-compatible tuning, advanced boost-by-gear control, and full smartphone connectivity through the free JB4PRO app, this tuner provides unmatched customization and logging capabilities. Whether you're running stock hardware or a fully modified build, the JB4 adapts to your setup for maximum power, efficiency, and reliability.
Built in the USA with a rugged billet aluminum enclosure and backed by a 5-year warranty, the JB4 remains the gold standard in turbocharged plug-and-play tuning worldwide.
Key Features & Benefits
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Increase up to 80whp on stock configuration
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Enhances 0–60 mph and ¼-mile acceleration
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Preloaded Supra-specific tuning software with up to 8 selectable maps
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E85 ethanol-compatible tuning options
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Read and clear fault codes directly via the JB4 app
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Monitor and record 40+ engine parameters in real time
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Boost-by-gear control for optimized traction and launches
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Full JB4PRO app compatibility for tuning adjustments and data logging
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Superior performance and safety features compared to standard chip tunes
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True Plug-and-Play installation with factory-smooth operation
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CANbus OBDII integration for unparalleled tuning precision
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Compatible with all factory driving modes
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No change to fuel economy during normal driving
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Requires 91+ octane fuel for performance maps
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Not VIN-locked—remove and resell anytime
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Durable billet aluminum housing for long-term protection
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Made in the USA and backed by a 5-year warranty
Vehicle Fitment
Toyota GR Supra Mk5
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2020–2026 Supra 3.0L (B58)
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2020–2026 Supra 2.0L (B48)
What Is a JB4?
The JB4 is an advanced plug-and-play tuning system for modern turbocharged vehicles. Installed between the engine sensors and ECU, it safely manipulates boost, timing, fuel delivery, and other performance parameters to significantly increase power. Unlike basic piggyback chips, the JB4 utilizes CANbus integration, fuel and spark control, Bluetooth connectivity, and proprietary mapping features for exceptional results. Ongoing firmware and map updates ensure continuous performance improvements, and the unit can be removed at any time without ECU flashing or permanent modification.
Is the JB4 a Real Tune?
Absolutely. The JB4 provides tuning control comparable to an ECU reflash by accessing real-time data through the vehicle’s CANbus system. It adjusts boost, ignition timing, air-fuel ratios, and fuel trims with precision—all while maintaining factory safety protocols. The vehicle operates smoothly, retains warranty-safe ECU status, and can revert to stock instantly by simply unplugging the unit.
