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BMS MINI F56 B38 B46 B48 JB4 Tuning Box (MINI Cooper S & JCW)
This Part has been discontinued and replaced by the BMS MINI B38 B48 B58 JB4 Tuning Box (Cooper S & JCW).
Ready to take your MINI B38/B48 turbo to the next level?How about up to 40hp to the wheels (50hp crank) on a completely stock B48 on pump gas? The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including on the fly in dash map switching between factory and various performance maps, optional in dash gauge displays for boost, boost limiting by gear for improved traction in lower gears, E85 fuel support, progressive water/methanol support, built in data logging, built in code reading, and much more.
Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but for more advanced enthusiasts the BMS DATA cable allows you to connect via a laptop for data logging and free software updates.
The latest B38/B48 map guide, feature set, firmware updates, and directions are posted here.
To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.
• 2014+ MINI F56 Cooper S B38/B46/B48 engine
• MINI JCW B48 2.0L Turbo
5 Year BMS Repair Warranty
Next Day UK Delivery
Get FREE Guaranteed next day UK delivery for orders over £99 (exc. VAT), excluding larger items and certain remote postal codes/areas. Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!
We ship worldwide via DHL International, simply enter your full address at checkout to see the shipping option(s) and quote(s). Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!