Description
Unlock the hidden performance in your Lexus 2.4L turbocharged platform with the JB4 Performance Tuner, the most advanced plug-and-play tuning solution available. Engineered specifically for the 2022+ Lexus NX, RX, and TX 350 models, the JB4 delivers up to 55 horsepower at the crank (40whp) on a completely stock vehicle using premium pump fuel—without the risks associated with ECU flashing.
The JB4 seamlessly integrates with your factory ECU, optimizing boost pressure, ignition timing, and fueling in real time to provide stronger acceleration, improved throttle response, and reduced turbo lag, all while maintaining factory safety systems and smooth OEM drivability.
Plug & Play Installation – No ECU Flash Required
Designed for simplicity and convenience, the JB4 features a true plug-and-play harness that connects directly to your vehicle’s sensors for quick installation and easy removal. No cutting, splicing, or permanent modifications are required. Unlike flash tunes, the JB4 leaves no footprint once removed, making it ideal for leased vehicles or owners seeking reversible performance upgrades.
No additional modifications or prior tuning stages are required—install it as your first upgrade and immediately experience enhanced performance.
Advanced CANbus Integration & Real-Time Tuning
The JB4 utilizes full CANbus integration to monitor and adjust critical engine parameters in real time. By accessing data such as throttle position, ignition timing, air/fuel ratios, fuel trims, engine knock, and gear selection, the system delivers adaptive, precision tuning for maximum performance and reliability.
This advanced functionality ensures superior power delivery and safety compared to basic tuning devices that lack real-time ECU communication.
JB4PRO Wireless Connectivity Included
This system includes the JB4PRO Bluetooth adapter and free mobile app, allowing seamless wireless control from your iOS or Android device. The JB4PRO app provides:
- On-the-fly switching between performance maps
- Real-time monitoring and logging of up to 40 engine parameters
- Diagnostic code reading and clearing
- Performance data analysis and troubleshooting tools
- Free firmware updates with new features and enhanced tuning maps
The integrated adapter is housed داخل the JB4 enclosure for improved durability, weather resistance, and a clean installation appearance.
Key Features & Benefits
- Up to +40whp / +55hp crank on a stock vehicle
- Noticeable gains in 0-60 acceleration and quarter-mile performance
- Multiple performance maps for various fuel types
- Quick plug-and-play installation
- Supports E85 ethanol blends
- Boost-by-gear control for improved traction
- Reads and clears fault codes
- Logs up to 40 engine parameters in real time
- Compatible with JB4PRO mobile app (included)
- Full CANbus integration for adaptive tuning
- OEM-like drivability with smooth power delivery
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for optimal performance
- Fully removable and not VIN-locked
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
Lexus Models:
- 2022+ Lexus NX 350 2.4L Turbo
- 2023+ Lexus RX 350 2.4L Turbo
- 2024+ Lexus TX 350 2.4L Turbo
What is the JB4?
The JB4 is a true plug-and-play performance tuning system designed for turbocharged vehicles. It connects between your vehicle’s sensors and ECU to safely manipulate boost, timing, and fueling in real time.
Unlike traditional ECU flashes, the JB4 retains factory safeguards while delivering significant power gains without permanently altering the ECU. With continuous firmware updates, advanced CANbus integration, and unmatched feature sets, the JB4 remains the industry benchmark for turbocharged performance tuning worldwide.
