The JB4 is the most advanced and highly featured tuning system available for your B58, B48, B46 vehicle. Power gains are up to 60hp to the wheels (80hp crank) on a completely stock car on pump gas for a B58 and up to 40hp to the wheels (55hp crank) for a B48, gains with bolt on parts, higher octane, and larger turbos are even higher. The JB4 features a simple plug and play installation harness for easy installation & removal and includes many features not found with 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, progressive water/methanol support, built in data logging, built in code reading, optional direct EWG control to prevent throttle closure with exhaust modifications, exhaust flapper control, 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 those who are interested in logging, adding new features as we post them, etc, we suggest the BMS DATA cable or REV3 mobile phone adapter.
JB4_B58 is CARB Approved Under Executive Order (EO) No.D-744-4 for all 2016-2018 BMW 230i, 330i, 430i, 530i, 340i, 440i, 740i, M240i, and X1 applications.
2015+ B58 M140
2016+ B48 120i
2017+ F22 F23 B58 240i/iX B48 230i/iX B48 225i/iX B46 220i/iX
2016+ F30 B58 340i/340iX B48 330i/330iX/330e B48 325i/325iX B46 320i/320iX B46 318i/318iX
2016+ F32 F33 F36 B58 440i/440iX B48 430i/430iX B48 425i/425iX B46 420i/420iX
2017+ G30 B58 540i/540iX B46/B48 530i/530iX/530e
X Series 2016+ X1 B46/B48 2018+ B46/B48 X2 B58 X3 M40i