Unlock serious performance from your Ford Explorer with the JB4 plug and play tuning box. This advanced piggyback tuner works seamlessly with the factory ECU to optimise boost, timing and fuelling for faster acceleration and reduced turbo lag, without the need to flash the ECU. Expect gains of up to 100hp and 120wtq at the wheels on a stock vehicle. Nforcd supplies this proven upgrade in the UK and knows the JB4 well.
- Plug and play installation using two easily accessed engine sensors for a clean, reversible upgrade
- No ECU flash required and compatible with locked ECUs
- Full CANbus OBDII integration for real-time tuning using pedal position, throttle, timing, AFR, knock, fuel trims, gear data and more
- Preloaded maps for 91 and 93 octane, factory map, Valet mode, E85 blends and unleaded race fuel
- Boost by gear control to help dial in launches
- Read and delete fault codes, plus log and view up to 40 parameters with the JB4 app
- Smooth factory-like drivability with fuel economy unchanged during normal driving
- Compatible with all driving modes including towing
- Not VIN locked so it can be removed without a trace and resold
- Rugged billet aluminium JB4 enclosure, designed and assembled in the USA
- 5 year manufacturer warranty
- Optional JB4 PRO Bluetooth module allows wireless connection to iOS and Android for map changes, logging and free firmware updates. The adapter fits inside the JB4 enclosure for improved weather protection. Free JB4PRO app available
- 91 octane fuel or better required for performance gains
Vehicle fitment:
- 2020+ Ford Explorer 3.0L Twin Turbo V6 EcoBoost including ST
- 2016-2019 Ford Explorer 3.5L Twin Turbo V6 EcoBoost
- 2016+ Ford Explorer 2.3L Turbo I4 EcoBoost
Harness selection:
- V1 Harness: two V1 sensors
- V1.5 Harness: one V1 sensor and one V2 sensor
- V2 Harness: two V2 sensors
- V3 Harness: one V3 sensor and one V2 sensor
Please check your Explorer’s charge pipe and intake manifold MAP sensors to confirm the correct harness before ordering. If you need help identifying sensors or choosing the right kit, contact Sales@nforcd.com.
The JB4 is a sophisticated tuning module for turbocharged vehicles that installs between engine sensors and the ECU, enabling precise control of boost, fuel and spark while leveraging CANbus data for safety and performance. It is frequently updated with new maps and firmware and remains a popular choice with Nforcd customers thanks to its power, features and easy reversibility.
Ready to transform your Ford Explorer with a proven remap alternative? Order your JB4 from Nforcd today. Professional fitting is available at Nforcd in Warwickshire. To request a fitting quote or technical assistance, email Sales@nforcd.com.




