S55 JB4 Tuner for 2015-2020 BMW M3/M4/M2C(Excludes Bluetooth Kit) | R 13801 – Check Prices Buy Online

Product Summary:

The S55 JB4 Tuner for 2015-2020 BMW M3/M4/M2C enhances performance, offering gains of up to 80whp/100tq on pump gas and more on higher octane or E85 mixtures. This tuner allows easy transition from stock to race settings with unique features like user-adjustable boost limiting, map switching, ethanol support, and diagnostic tools. It is compatible with various flash maps, providing flexibility for different builds. The JB4 can be wirelessly connected to mobile devices for data analysis and tuning changes. It offers improved performance, multiple tuning maps, fault code reading, and boost control by gear. The JB4 is easy to install, offers CANbus integration, and comes with a 5-year warranty.

What is a JB4?:

The JB4 is a plug & play tune for turbocharged vehicles that manipulates performance by connecting to the car’s sensors and ECU. It features advanced connection points, CANbus integration, Bluetooth connectivity, free updates, and can be easily transferred between vehicles. The JB4 has set the standard in turbocharged performance tuning for over a decade.

Map Guide for S55 BMW M3/M4 JB4:

• Map 0: Disable JB4
• Map 1: Stage 1 adding ~40whp and 40wtq on pump gas
• Map 2: More aggressive version of map 1 for higher octane fuels
• Map 3: Less aggressive map for lower grade fuels
• Map 4: OEM performance with active JB4 for diagnostics
• Map 5: Low torque / linear throttle map
• Map 6: Custom tuning map
• Map 7: Race gas map
• Map 8: Methanol injection map

The S55 JB4 offers various tuning options for different fuel types and modifications to optimize vehicle performance.