E Series N55 JB4

E Series N55 JB4

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MFG# JB4_N55

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 DATA cable allows you to connect via a laptop for data logging and free software updates.

JB4 Features and Benefits

• Increases horsepower making your BMW faster
• Lot's of great features
• Plug and play installation 
• Fuel economy unchanged during normal driving 
• Free firmware updates for life
• Removes without a trace
• Attaches to easy to access plugs
• Connects to your smart phone or laptop
• Boost can be adjusted using BMS data cable/bluetooth adapter
• Compatible with all driving modes 
• Ships free in the USA
• Made in USA

N55 JB4 Dyno Results

JB4 Only

JB4, Exhaust, E85 Fuel

JB4, Exhaust, Hybrid Turbo, E85 Fuel

Optional JB4 Phone Software
JB4 Optional Startup Gauge Sweep
JB4 Optional In Dash 
Boost Gauge / Shift Light Demo
JB4 135i 335i Steering Wheel Controls 
Demo Video

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

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