Description
The Burger Tuning JB4 Tuner for 2022+ Lexus NX 350, 2023+ Lexus RX 350, and 2024+ Lexus TX 350 delivers up to 55hp (40whp) gains on a completely stock vehicle using premium pump gas—without flashing the ECU.
This advanced plug-and-play system connects directly to your vehicle’s sensors for easy installation and removal, integrating CANbus OBDII to access critical engine data for real-time tuning adjustments, enhanced safety features, and optimal performance. Features include on-the-fly map switching, boost by gear control, built-in code reading, and E85-compatible maps.
No additional modifications are required, and the JB4 runs as smoothly as stock, retaining factory drivability and fuel economy during normal use. For tuning flexibility, data logging, and firmware updates, add one of our Bluetooth phone adapters for wireless connection to the JB4 Mobile or JB4PRO app.
Features & Benefits
- Gains up to 40whp / 55hp crank on a stock vehicle
- Improves 0–60mph and 1/4-mile times
- Preloaded with custom Lexus 2.4L JB4 software and up to 8 maps
- Ethanol (E85) compatible tuning maps
- Boost by gear control for 1st, 2nd, and 3rd gears
- View/log up to 40 engine parameters in real time via JB4 app
- Read and delete fault codes
- Quick plug-and-play installation – no cutting or splicing
- CANbus OBDII integration for unmatched tuning precision
- Compatible with all driving modes
- Fuel economy unchanged during normal driving
- Not VIN-locked – transferable and removable without a trace
- Rugged billet aluminum enclosure for protection
- Made in the USA with a 5-year warranty
Vehicle Fitment
Lexus
- 2022+ NX 350 2.4L 4-Cyl Turbo
- 2023+ RX 350 2.4L 4-Cyl Turbo
- 2024+ TX 350 2.4L 4-Cyl Turbo
What is a JB4?
The JB4 is a plug-and-play performance tuner for turbocharged vehicles, adjusting boost, fueling, and timing for significant power gains while maintaining factory reliability. Its CANbus integration allows for advanced tuning strategies, safety protections, and data logging not possible with simpler piggyback systems.
With E85 support, free firmware updates, and fully reversible installation, the JB4 is the ultimate no-flash tuning upgrade for Lexus turbo owners.
