Unlock serious, repeatable performance from your 2022 onwards Range Rover 4.4-litre V8 twin-turbo with the JB4 plug-in tuning box. This advanced piggyback tuner integrates via CANbus for precise control and data logging, delivering gains of up to 100 hp and 140 tq at the wheels on a stock vehicle while retaining factory smoothness and safety systems. No ECU flash required and fully compatible with locked ECUs. Note: this application is currently in beta.
- Up to 100 hp and 140 tq to-the-wheels on a standard vehicle
- Quick plug-and-play installation with CANbus OBDII integration
- Preloaded with up to 8 performance maps for different fuel and modification levels
- Ethanol E85-compatible tuning maps and boost-by-gear control
- User-adjustable fuel control plus WMI support
- Compatible with the free JB4PRO app and JB4 Mobile for Bluetooth map switching, firmware updates, logging and analysis
- View and record up to 40 live engine parameters, read and clear fault codes
- Works with all driving modes and maintains stock-like drivability; fuel economy unchanged during normal driving
- Not VIN-locked - remove without trace and resell later
- Rugged billet aluminium enclosure, made in the USA, 5-year warranty
- 91 octane fuel or better required for performance gains
Use the JB4 as a stand-alone tuning solution or alongside a performance flash map where you want enhanced logging, safety features and fine-tuning tools. Nforcd knows this product well and it has been a popular upgrade for owners seeking a high-quality aftermarket tuning module for the twin-turbo V8 Range Rover.
Vehicle fitment
Range Rover 2022+ 4.4-litre V8 twin-turbo models: SE, SV, Autobiography, First Edition.
Order your JB4 from Nforcd today for a powerful, reversible tuning upgrade. Professional fitting is available through Nforcd in Warwickshire - request a quote at Sales@nforcd.com.