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.Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. Separate JB4 Mobile app purchase also required.

Click here for the latest JB4 firmware, map guide, and details.How to tell if you need harness A or B

 

JB4 FEATURES AND BENEFITS

• Power gains of up to 60hp and 60tq to the wheels on a stock vehicle
• Quick Plug & Play Installation
• CANbus integration offering unrivaled tuning features and performance
• Runs as smoothly as stock, this is how your N55 should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• Not VIN locked, can be removed without a trace and resold down the road
• Made in the USA
• Free USA Shipping
• 5 year warranty

N55 JB4 APPLICATIONS

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

BMW 3 Series
• 2011 N55 BMW E90 E91 335i/iX
• 2011-2013 N55 BMW E92 E93 335i/iX

BMW X Series
• 2011-2016 N55 BMW X1
• 2011-2013 N55 BMW E70 X5 35i/iX
• 2011-2013 N55 BMW E71 X6 35i/iX

 

JB4 INSTALL GUIDE

• Download Install Guide
  
  
  
  • Click here for the latest JB4 firmware, map guide, and details
  
  
  • How to tell if you need harness A or B
  
  
  
  

 

DOWNLOAD JB4 APP

• Download JB4 iPhone App


• Download JB4 Android App

 

What is a JB4?

The JB4 is a plug and play tune available for turbocharged vehicles. The JB4 tuner installs between your cars sensors and it's DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus, fuel & spark control, bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. In addition the JB4 system is not VIN locked to your vehicle and can quickly removed and swapped between cars or resold at a later time. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.

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