Description
JB4 Tuner for 2023+ Toyota Highlander, Crown & Vellfire 2.4L Turbo – Up to 55HP Gains
Enhance the performance of your 2023+ Toyota 2.4L turbocharged platform with the JB4 Performance Tuner, the most advanced plug-and-play tuning solution available. Engineered for seamless integration and maximum efficiency, the JB4 delivers up to 55 horsepower at the crank (approximately 40 WHP) on a completely stock vehicle using premium pump fuel—without the risks associated with ECU flashing.
The JB4 connects directly to your vehicle’s sensors and works in harmony with the factory ECU to precisely optimize boost, ignition timing, and fueling. The result is significantly improved acceleration, throttle response, and overall driving performance, all while maintaining factory safety systems and smooth drivability.
True Plug-and-Play Performance with Advanced Control
Designed for simplicity, the JB4 features a plug-and-play harness that allows for quick installation and complete removal without leaving any trace. It requires no prior modifications, making it the perfect first upgrade for drivers seeking reliable, noticeable performance gains.
Beyond its ease of use, the JB4 offers advanced tuning features not found in standard chip tuners, including:
- On-the-fly map switching between stock and performance modes
- Boost-by-gear control for improved traction and smoother launches
- Progressive water/methanol injection support (when equipped)
- Built-in data logging and diagnostic code reading
Wireless JB4PRO Connectivity Included
Both versions include the JB4PRO Bluetooth adapter and free mobile app, enabling full wireless control from your smartphone (iOS or Android). With the JB4PRO app, you can:
- Switch between multiple performance maps
- Monitor and log up to 40 engine parameters in real time
- Read and clear fault codes
- Analyze vehicle performance and identify tuning opportunities
- Install free firmware updates with new features and performance enhancements
The integrated adapter design ensures improved durability, weather protection, and a clean OEM-style installation.
Performance Without Compromise
The JB4 delivers impressive power gains while maintaining factory-like drivability and fuel economy during normal driving conditions. It is fully compatible with all driving modes and requires 91 octane or higher fuel to achieve maximum performance gains.
Key Features & Benefits
- Up to +55 HP (crank) / +40 WHP on a stock vehicle
- Improved 0-60 acceleration and quarter-mile performance
- Multiple tuning maps for different fuel types and driving conditions
- Quick plug-and-play installation with no ECU flash required
- Boost-by-gear control for improved traction
- Supports E85 ethanol blends
- Built-in data logging and diagnostic fault code reading/clearing
- Logs up to 40 engine parameters in real time
- Compatible with JB4PRO smartphone app (included)
- Full CANbus integration for advanced tuning precision
- Smooth, OEM-like operation
- No impact on fuel economy during normal driving
- Fully removable and not VIN-locked
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
Toyota Models:
- 2023+ Toyota Highlander 2.4L Turbo (LE, XLE, XSE)
- 2023+ Toyota Crown 2.4L Turbo (XLE, Limited, Platinum)
- 2023+ Toyota Vellfire 2.4L Turbo
Why Choose JB4?
The JB4 is a true plug-and-play performance tuning system, offering ECU-level control without the need for ECU unlocking or flashing. By integrating with your vehicle’s sensors and CANbus system, it safely adjusts boost, timing, AFR, and fuel trims in real time—delivering significant, reliable power gains while preserving factory safety features.
With ongoing free firmware updates, unmatched tuning flexibility, and a proven global reputation, the JB4 continues to set the standard for turbocharged performance tuning systems.
