JB4 Units

JB4 Units

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.


JB4 - MQB Audi S3, Golf R, Golf GTi, Seat Leon, Audi TTS, Audi S1

JB4 - MQB Audi S3, Golf R, Golf GTi, Seat Leon, Audi TTS, Audi S1

JB4 - Audi S3, Golf R, Golf GTi, Seat Leon, Audi TTS, Audi S1The MQB JB4 is by far the most advance..

£387.00

JB4 – BMW S55 M3 M4 M2 competition

JB4 – BMW S55 M3 M4 M2 competition

JB4 – BMW S55 M3 M4 M2 competition The BMW S55 engine is found in the M3, M4 and the new M2 com..

£567.00

BMW Stealth Tank M3 M4 F30 F32

BMW Stealth Tank M3 M4 F30 F32

The 3 gallon stealth tank the WMI pump mounts directly to the tank and the entire assembly fit..

£299.95

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