Unlock serious, safe performance from your Hyundai or Genesis 3.5L SmartStream Turbo V6 with the JB4 (V4). This plug-and-play piggyback tuner works alongside the factory ECU to optimise boost, timing and fueling, delivering stronger acceleration, reduced turbo lag and power gains of up to 100hp and 100tq at the wheels on a stock vehicle. Supplied in the UK by Nforcd, it retains OEM drivability while adding advanced control and safety features.
- Power gains of up to 100hp and 100tq at the wheels on a stock car
- Preloaded with up to 8 maps including stock and valet, with on-the-fly selection via BMS cable or JB4 mobile adapter
- Map 1 targets around 4psi over stock peak for a smooth, reliable uplift
- CANbus OBDII integration monitors pedal input, throttle, gear, RPM, AFR, fuel trims, ignition advance, knock feedback and more for intelligent control
- Built-in safeguards: reduced boost until oil and coolant are up to temperature, and automatic low-boost fallback if overheating, lean conditions, excessive knock or overboost are detected
- Data logging and real-time viewing of up to 40 parameters via the JB4 app
- Boost-by-gear control in 1st, 2nd and 3rd through the JB4 app to aid traction and launches
- Exhaust flap control available on most JB4 applications
- Maps available for 91 and 93 octane fuels, plus ethanol E85 mixtures
- Read and clear fault codes within the JB4 interface
- Runs as smoothly as stock and compatible with all drive modes
- Fuel economy typically unchanged during normal driving
- Quick plug-and-play install, fully removable with no trace and not VIN-locked
- Rugged billet aluminium enclosure, designed and assembled in the USA
- 5 year warranty
Wireless app control with JB4PRO
Add the JB4PRO smartphone connection to pair the JB4 with your iOS or Android device. Adjust maps, log and analyse runs, read/clear faults and update firmware using the free JB4PRO app. The Bluetooth adapter fits inside the JB4 enclosure for a neat, weather-protected install.
Vehicle fitment
- Hyundai: 2021+ Staria 3.5L SmartStream Turbo V6
- Genesis: 2022+ GV70 3.5L SmartStream Turbo V6
- Genesis: 2021+ GV80 3.5L SmartStream Turbo V6
- Genesis: 2025+ GV80 Coupe 3.5L SmartStream Turbo V6
- Genesis: 2021+ G80 3.5L SmartStream Turbo V6
- Genesis: 2022+ G90 3.5L SmartStream Turbo V6
If you are unsure about compatibility, contact Nforcd and we will be happy to help.
Choose a proven JB4 tuning solution for your SmartStream V6 and experience sharper response and stronger performance while keeping OEM safety systems intact. Order from Nforcd today. Professional fitting is available through Nforcd in Warwickshire; request a quote via Sales@nforcd.com.