BMS JB4 Tuning Box for Toyota A90 GR Supra, plug and play performance for B58 3.0 and B48 2.0
Unlock serious power and torque from your Toyota A90 GR Supra with the Burger Motorsports JB4 Tuning Box, part number BMS171. This proven piggyback tuner is the go to upgrade for Supra owners who want fast, reliable gains without an ECU flash. Expect up to 80 hp to the wheels on a completely stock car on pump fuel, with even stronger results when combined with bolt ons, higher octane, E85 blends and larger turbos. Smooth factory like drivability, big performance, easy installation, real features. The JB4 is the performance tuning box Supra drivers search for.
We run JB4 ourselves and our customers love the transformation. Sharper throttle response, stronger mid range, harder pull to redline and improved 0 to 60 and quarter mile times, all while retaining stock like manners in daily driving. No permanent changes, not VIN locked, remove without a trace and resell later.
Why choose the JB4 for your Toyota Supra A90
- Up to 80 whp gain on a stock vehicle, even more with supporting mods
- Plug and play install using a model specific harness, no ECU flash required
- Works with Toyota GR Supra 3.0 B58 and 2.0 B48 turbo engines
- CANbus OBDII integration for unrivalled control, safety and performance
- Built in data logging and code reading, easy troubleshooting and tuning insight
- Boost by gear for traction, smooth power delivery in lower gears
- Progressive water methanol support for advanced setups
- Optional direct EWG control to prevent throttle closure with exhaust mods
- Exhaust valve flapper control
- Ethanol compatible maps, E85 blend friendly
- Fuel economy unchanged during normal driving
- Compatible with all Toyota driving modes
- Not VIN locked, remove and revert to stock at any time
- Rugged billet aluminium JB4 enclosure
- Free firmware updates with new maps and features
- Made in the USA, backed by a 5 year BMS repair warranty
Control, maps and connectivity
For the Supra platform, map and setting changes are made via the optional JB4 Mobile Bluetooth Connect Kit for iOS and Android, or via the BMS Data Cable for Windows laptops. Both options let you log, analyse data, switch performance maps and update JB4 firmware as new releases become available. Separate JB4 Mobile app purchase required.
Note, generic JB4 literature mentions in dash map switching on some platforms, however for the Supra in dash commands have not been developed yet. Use the JB4 Mobile adapter or BMS Data Cable to change maps and settings.
Real world performance gains for GR Supra owners
Whether your Toyota A90 Supra is stock or fitted with popular bolt ons like a high flow downpipe, cat back exhaust, intake or intercooler, the JB4 tuning box extracts safe, repeatable performance. Premium fuel is recommended, 91 octane or better for best results. With higher octane and ethanol blends, gains are even stronger. The JB4 runs as smoothly as stock, exactly how the Supra should have come from the factory.
Recommended add ons
For the full JB4 experience add:
- JB4 Mobile Bluetooth Connect Kit, wireless map control and logging from your phone
- BMS Data Cable, fast laptop logging, updates and map changes
Compatibility
- Toyota A90 GR Supra 3.0L 6 cylinder, 2020 onward
- Toyota A90 GR Supra 2.0L 4 cylinder, 2021 onward
Installation and fitting
The JB4 is a quick plug and play install that can be removed just as easily. Prefer professional fitting. Book your installation with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Compatibility check before dispatch
We verify fitment before shipping. Provide your UK registration or the last 7 digits of your VIN at checkout and we will run a compatibility check.
Why buy from Nforcd
- We stock and use JB4 on our own vehicles
- Expert product support and setup guidance
- Professional fitting available at our Warwickshire workshop
Key details
Part number BMS171
Manufacturer Burger Motorsports
Warranty 5 year BMS repair warranty