Unlock serious performance from your B58-powered INEOS Grenadier with the JB4 plug-and-play tuning box from Nforcd. Designed for the 3.0 turbo engine, this advanced piggyback ECU delivers proven gains of up to 80 whp and 100 lb ft at the wheels on a stock vehicle running pump fuel, without the risks of flashing. It is fully compatible with locked ECUs and now includes the JB4PRO Bluetooth connection and free smartphone app as standard.
- Plug-and-play JB4 tuner for the INEOS Grenadier B58 3.0 turbo, no ECU flash required
- Gains up to 80 whp and 100 lb ft on a stock car, with potential for more on higher octane, E85 blends, bolt-ons or larger turbos
- In-dash map switching, optional in-dash boost gauge display, boost by gear and exhaust flap control
- Built-in data logging, read and clear fault codes, progressive water/methanol integration and advanced CANbus OBDII support
- JB4PRO Bluetooth connection and free app included for wireless map changes, firmware updates and log analysis
- Factory-like drivability, compatible with all driving modes, not VIN locked and easily removed for resale
Housed in a rugged billet aluminium enclosure and designed and assembled in the USA, the JB4 offers a powerful, flexible alternative to a remap. Install it first for instant results, then tailor the setup as you add supporting modifications. For best results on performance maps, 91 octane fuel or higher is recommended.
JB4 Map Guide
- Map 0: Stock operation, JB4 inactive
- Map 1: Approx. +3 psi over stock for 91 octane
- Map 2: Approx. +4 psi over stock for 91 to 93 octane
- Map 3: Approx. +6 psi over stock for 93+ octane
- Map 4: Approx. +8 psi over stock for race fuel or around 30% E85
- Map 5: Approx. +10 psi over stock for race fuel or around 30% E85
- Map 6: User custom tuning
- Map 7: Progressive water/methanol control
- Map 8: Valet or low boost mode
Vehicle fitment
- 2023+ INEOS Grenadier 3.0L B58 SUV
- 2023+ INEOS Grenadier Quartermaster 3.0L B58 Pickup
Additional highlights
- Optional electronic wastegate control helps prevent throttle closure with exhaust modifications
- Smooth factory-like drivability with no change to fuel economy during normal driving
- 5-year warranty
What is the JB4?
The JB4 is an intelligent tuning module that installs between engine sensors and the factory ECU. By safely adjusting boost, timing and fueling via its CANbus connection, it delivers substantial performance gains while retaining OEM safety systems and leaving the ECU unmodified.
Nforcd knows this upgrade inside out and it has been a popular choice with our customers looking for a fast, reversible performance boost on the Grenadier B58. Order online today, or contact us for fitting. Professional installation is available at Nforcd in Warwickshire. To request a fitting quote, email Sales@nforcd.com.