2015+ M3/M4 S55 JB4


2015+ M3/M4 S55 JB4 F80S55JB4



• 2015+ F80 M3


• 2015+ F82 M4

Ready to take your turbo //M vehicle to the next level?


ultimate tune for your S55 powered vehicle, the JB4 allows you to go

from factory stock to full race, and everywhere in between, with the

push of a button on your steering wheel. The JB4 installs and removes

easily and includes many unique features not found in any other tune

including user adjustable 1st and 2nd gear boost limiting, map switching

in dash, electronic wastegate control, ethanol fuel support, and built

in advanced CANbus based diagnostic tools. Installation is completely

removable with no splicing or cutting of factory wires.

For the latest performance results, updates, firmware, and map guide be sure to visit

JB4 Map Guide

Map 0: Disable JB4 / Full Pass Through Mode

Map 1: Stage1 map adding approximately 40whp and 40wtq across the power band on pump gas. Suitable for all stages and fuel mixtures.

Map 2: Slightly more

aggressive version of map 1 intended for vehicles with exhaust

modifications and 93+ octane fuel. Can also be used with E85 and racing

fuel mixtures.

Map 3: Slightly less aggressive version of map 1 intended for vehicles running on lower grade fuels such as 91 octane.

Map 4: OEM performance but with JB4 active for diagnostics only.

Map 5: //M low torque / linear throttle map.

Map 6: Custom tuning map.

Map 7: Race gas map.

Requires 100 octane unleaded fuel and for the fuel mass connector to be

installed. This map can also be used with up to 35% E85.

Map 8: Methanol injection map. Requires BMS FSB controller or methanol kit for progressive mapping and safety systems.

£745 In stock
Datacable Required YES (25) NO (0) Bluetooth Module Rev3 (150)
S55 M3 M4 JB4 S55 M3 M4 Stage 1 S55 JB4 maps