Finally a JB4 for your N55 "Twin Power" BMW!

BMW Tuner JB4 E chassis N55 Performance upgrade

Ready to take your BMW N55 turbo 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 on the fly in dash map switching between factory and various performance maps, optional in dash gauge displays for boost and other critical engine parameters, progressive water/methanol support, ethanol fuels support, 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 USB cable allows you to connect via a laptop for data logging and free software updates.

N55 JB4 Dyno Results
JB4 Only	JB4, Exhaust, E85 Fuel	JB4, Exhaust, Hybrid Turbo, E85 Fuel

Applications:

BMW 1 Series
• 2011-2013 N55 BMW E82 E88 135i LHD

BMW 3 Series
• 2011+ N55 BMW E90 E91 E92 E93 335i/ix

BMW X Series
• 2011+ N55 BMW X1

F Chassis N55 JB4 - Click Here

JB4 Optional Startup Gauge Sweep

Click here for the latest JB4 firmware, map guide, and details.

JB4 Optional In Dash
Boost Gauge / Shift Light Demo

JB4 135i 335i Steering Wheel Controls Demo Video

How to tell if you need harness A or B. Click Here for TMAP Location and Photos

135i N55 Engine Performance

BMS N55 Performance Intake

Burger Motorsports JB4 - N55

PWRHAUS BMW N55 Diverter Valve Spacer

Dinan Oil Cooler Kit for E82/E88 135 N55

PWRHAUS BMW N55 Diverter Valve Spacer