F Chassis N55 BMW JB4 Tuner Choose your vehicle:JB4_F10_A The JB4 tuner installs between

The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster

BMS billet intake shown on 2017+ F22 F23 (B46/B48 engine) 230 225 220

The BMS OCC retains the factory fully closed loop PCV operation preventing any PCV vapor from leaking to the atmosphere

Dual Mounting Points

Note we also offer scratched enclosures at a discounted price

F Chassis N55 BMW JB4 Tuner Choose your vehicle:JB4_F10_A The JB4 tuner installs betweenPower gains of up to 80HP on a stock vehicle without the risks of flashing! Ready to take your F chassis N55 BMW to the next level? How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including the ability to enable disable