Description
Lexus JB4 Tuner – Plug-and-Play Performance Upgrade
Transform your turbocharged Lexus into a high-performance powerhouse with the JB4 Tuner. Designed for seamless integration with your factory DME, the JB4 increases horsepower and torque without requiring an ECU flash, even on locked ECUs. With gains of up to 45 crank horsepower and 45 lb-ft of torque on Map 1, and higher potential with race fuel or E85 blends, your Lexus will see faster 0-60 times, improved quarter-mile performance, and reduced turbo lag.
Plug-and-Play Installation & Advanced Processor
The JB4 connects directly to easily accessible sensors in the engine bay, making installation quick, clean, and fully reversible. Featuring a 64 MHz processor, the tuner samples sensors 800 times per second using dedicated 10-bit digital-to-analog converters, ensuring smooth, precise, and powerful tuning without compromising drivability.
CANbus Integration & Real-Time Tuning
Full OBDII CANbus functionality allows the JB4 to monitor critical engine data in real time, including throttle position, pedal input, air/fuel ratios, timing advance, and more. This allows for advanced tuning capabilities and ensures safe, reliable power delivery across all driving modes.
Wireless JB4PRO Connectivity
Connect your JB4 tuner to iOS or Android devices via Bluetooth 4.0 with the included JB4PRO adapter. This app allows you to:
- Record and analyze vehicle performance data
- Switch between performance maps
- Update firmware for free as new maps and features are released
- Access intuitive logging and diagnostic tools
The JB4PRO adapter fits fully inside the JB4 enclosure for weather protection and a streamlined look.
Key Features & Benefits
- Up to 45 crank horsepower and 45 crank torque gains
- Faster 0-60 and quarter-mile times
- Multiple maps for different fuels, including E85
- Plug-and-play installation
- Reads and clears fault codes
- Logs up to 40 engine parameters
- Boost-by-gear control for improved traction
- Controls exhaust flap operation on supported vehicles
- Smooth stock-like operation
- Maintains fuel economy under normal driving
- Non-VIN locked and fully removable
- Billet aluminum enclosure, USA designed and assembled
- 5-year warranty
Vehicle Compatibility
- 2015+ Lexus NX 200t
- 2016+ Lexus RC 200t, IS 200t, IS 300t, GS 200t, NS 200t
- 2018+ Lexus NX 300
Why Choose JB4?
The JB4 is a proven, plug-and-play tuning solution for turbocharged vehicles worldwide. It offers the benefits of an ECU reflash—altered boost, timing, air/fuel ratios, and fuel trims—without ever triggering ECU flags or compromising factory safety systems. Regularly updated firmware and maps ensure your JB4 continues to deliver cutting-edge performance for years to come.
