Description
The Burger Motorsports (BMS) JB4 is a high-performance plug & play tuning system designed for modern turbocharged Lexus platforms. This BETA version is engineered specifically for the Lexus LX 600 and Lexus GX 550 3.5L Twin Turbo engines, delivering significant power gains while maintaining factory drivability, safety systems, and full reversibility.
The JB4 is installed between the engine sensors and the ECU (DME), allowing real-time performance optimization through advanced CANbus integration. Unlike traditional ECU flashes, it does not permanently modify or lock the factory ECU, making it fully removable and safe to use on leased or warranty-sensitive vehicles.
This system includes the latest JB4PRO Bluetooth adapter, enabling wireless control and advanced tuning management directly from your smartphone.
Key Features & Benefits
• Power gains of up to 75hp to the wheels on a stock vehicle (up to 60hp at the wheels / 75hp crank)
• Improves 0–60 acceleration and quarter mile performance
• Multiple tuning maps for different fuel types and setups
• Plug and play installation and removal
• Supports E85 ethanol blends and higher octane fuels
• Reads and clears fault/diagnostic codes
• Displays and logs up to 40 engine parameters in real time
• Boost-by-gear control for improved traction
• Controls exhaust flap operation on supported vehicles
• Compatible with JB4PRO Bluetooth smartphone app
• Full CANbus integration for advanced tuning control
• Maintains smooth factory-like drivability
• Works with all factory driving modes
• No noticeable impact on fuel economy during normal driving
• Requires 91 octane or higher for optimal performance gains
• Fully removable and not VIN-locked
• Includes durable billet aluminum enclosure
• Designed and assembled in the USA
• Backed by a 5-year warranty
JB4PRO Bluetooth App & Connectivity
The included JB4PRO Bluetooth adapter allows wireless connection to iOS and Android devices. Users can monitor and log vehicle data, switch performance maps, update firmware, and analyze tuning performance in real time.
The adapter fits inside the JB4 enclosure for improved protection and a clean installation. The JB4PRO app provides an intuitive interface with logging tools, help functions, and advanced performance analysis.
Optional Accessories
• JB4 MAP Sensor Bypass Extensions simplify installation and removal by allowing easier access to difficult rear MAP sensor connections
• Additional BMS data cable or Bluetooth adapter options available for advanced logging and customization
What is the JB4?
The JB4 is an advanced plug & play piggyback tuning system designed for turbocharged engines. It installs between the vehicle’s sensors and ECU, modifying performance in real time through boost, fuel, and timing adjustments.
Unlike basic tuning solutions, the JB4 integrates CANbus communication, smartphone connectivity, and advanced control features. It continuously receives free updates and new maps from Burger Motorsports, ensuring ongoing development and performance improvements.
The system is not VIN-locked, fully removable, and can be transferred between vehicles or resold. It is widely recognized as one of the most advanced piggyback tuning systems available globally.
Vehicle Fitment
Lexus
• 2022+ Lexus LX 600 3.5L Twin Turbo BETA
• 2024+ Lexus GX 550 3.5L Twin Turbo BETA
Is the JB4 a Real Tune?
Yes, the JB4 is a fully functional performance tuning system. It adjusts critical engine parameters such as boost, timing, air-fuel ratios, and fuel trims using real-time sensor data and CANbus integration.
This allows it to deliver ECU flash-level performance gains without permanently modifying the factory ECU. The result is increased horsepower and torque while preserving factory safety systems and drivability.
