Description
Unlock your vehicle’s turbocharged potential with the JB4 Gen3B (Group 8), the most advanced plug-and-play tuner for Audi, Volkswagen, Skoda, and Seat 2.0T engines. Delivering minimum power gains of 30 hp and 45 lb-ft torque at the wheels on stock vehicles, this tuner enhances throttle response, reduces turbo lag, and improves 0-60 acceleration and quarter-mile performance. With higher octane fuel or bolt-on modifications, gains can be even greater.
The JB4 connects directly to easy-to-access sensors in the engine bay and works seamlessly with your factory ECU to remap boost, timing, and fueling. Featuring a 64 MHz processor, sensors are sampled 800 times per second using dedicated 10-bit digital-to-analog converters, ensuring smooth, precise, and powerful performance.
Advanced CANbus Integration & Safety Features
The JB4 Gen3B includes a fully programmable CANbus system, allowing it to incorporate critical engine data—including pedal input, throttle position, gear, engine speed, air/fuel ratio, fuel trims, ignition advance, and knock—into its performance mapping. The system also features:
- Automatic low-boost mapping until oil and coolant reach optimal temperatures
- Overheat, overboost, and knock protection
- Reads and clears fault codes
- Boost-by-gear control for improved traction
- Exhaust flap control on supported vehicles
The default JB4 map 1 runs 3 psi over stock, with multiple tuned maps, including valet and stock modes, selectable on the fly using the included JB4PRO Bluetooth adapter and free app.
Wireless JB4PRO Connectivity
The JB4PRO adapter connects wirelessly to Bluetooth 4.0 compatible iOS or Android devices. Adjust maps, monitor real-time engine data, record logs, and update firmware as BMS releases free updates with new maps and features. The adapter fits fully inside the JB4 enclosure for enhanced weather protection and a streamlined look. The app includes an intuitive interface, advanced log analysis, and real-time performance estimation.
Key Features & Benefits:
- Minimum 30 hp and 45 lb-ft torque gains at the wheels on stock vehicles
- Improves 0-60 acceleration and quarter-mile times
- Multiple performance maps for pump gas and E85 ethanol
- Quick plug-and-play installation, fully removable, non-VIN locked
- Reads and clears fault codes; logs up to 40 engine parameters
- Boost-by-gear control for traction optimization
- Exhaust flap operation control on supported vehicles
- Compatible with free JB4PRO app
- Superior performance and safety compared to basic chip tunes
- Full CANbus integration for ECU-level tuning
- Smooth operation in all driving modes
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for full performance potential
- Premium billet aluminum enclosure, designed and assembled in the USA
- 5-year warranty
Vehicle Compatibility:
Audi:
- 2017-2021 8V A3 FWD 2.0T 184 hp
- 2017+ B9 A4 2.0T 190 hp
- 2017+ B9 A5 2.0T 190 hp
Skoda:
- 2017+ Kodiaq 2.0T 180 hp
Seat:
- 2017+ Ateca 2.0T 190 hp
Volkswagen:
- 2017+ Arteon 2.0T 190 hp
- 2017+ Tiguan 2.0T North American & 184 hp / 140 kW
- 2017+ T-Roc N1 2.0T 184 hp
- 2018+ Passat 2.0T North American 174 hp
- 2018+ Polo GTI AW 2.0T 200 hp
Why JB4?
The JB4 Gen3B is a true plug-and-play performance tuner. By accessing sensors and CANbus data, it safely and effectively adjusts boost, timing, fuel trims, and AFR, delivering significant power gains without compromising factory safety systems. Free firmware and map updates from BMS continuously improve performance, add features, and enhance safety. Non-VIN locked and fully removable, the JB4 remains the gold standard in turbocharged vehicle tuning worldwide.
