S68 JB4 Tuner for 2025+ BMW G90 M5 & G99 M5 MK8 expect a little less horsepower

expect a little less horsepower than Stage 1

• Retains OEM heat shield for low IATs

• 2009-2011 E70 X5 50i sDrive/xDrive (N63 TYPE_A)

This feature eliminates the hassle of securing hard-to-reach bolts

S68 JB4 Tuner for 2025+ BMW G90 M5 & G99 M5 MK8 expect a little less horsepowerGains are 93whp on pump gas and up to 135whp on higher octane or E85 mixtures. The ultimate tune for your 4. 4L S68 powered G90 BMW M5. The JB4 allows you to go from factory stock to full race and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune, including user adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol fuel support,