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.


 JB+ BMW N55 M135 M235 M2

JB+ BMW N55 M135 M235 M2

JB+ N55 M135 M235 M2There are many tunes available for the BMW N55. The most advanced and well prov..

£177.00

BMS Elite M3/M4 S55 Replacement Aluminum Chargepipes and J Pipe

BMS Elite M3/M4 S55 Replacement Aluminum Chargepipes and J Pipe

BMW's new S55 motor is a modern marvel but one weakness we've identified are the boost tubes or cha..

£179.00

JB+ BMW B58 M140i M240i 340i 440i

JB+ BMW B58 M140i M240i 340i 440i

JB+ B58 M140i M240i 340i 440i There are many tunes available for the BMW B58. The most advance..

£177.00

JB4 - Audi B9 S4/S5/SQ5/RS4/RS5 BETA with BCM

JB4 - Audi B9 S4/S5/SQ5/RS4/RS5 BETA with BCM

This easy to install plug and play tuner attaches to sensors in the engine bay and works with your ..

£777.00

JB4 - BMW B58 M140, M240, 340i, 440i tuning box

JB4 - BMW B58 M140, M240, 340i, 440i tuning box

B58 JB4 - BMW M140, M240, 340i, 440i tuning boxThe B58 JB4 is by far the most advanced tuning box av..

£442.00

JB4 - BMW N55 Electronic Wastegate (EWG)

JB4 - BMW N55 Electronic Wastegate (EWG)

JB4 - N55 Electronic Wastegate (EWG)The N55 EWG JB4 is by far the most advanced tuning box availabl..

£412.00

JB4 - BMW N55 Pneumatic Wastegate (PWG) M135i

JB4 - BMW N55 Pneumatic Wastegate (PWG) M135i

The N55 PWG JB4 is by far the most advanced tuning box available for the platform. The N55 PWG JB4 ..

£412.00

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

JB4 BMS Pedal Tuner VW Audi Seat

JB4 BMS Pedal Tuner VW Audi Seat

BMS Pedal Tuner VW Audi SeatThe VW Audi SEAT BMS pedal tuner connects to your throttle pedal and al..

£187.00

BMS WMI Billet Spacer – BMW B58 (M140I, M240I, 340I & 440I)

BMS WMI Billet Spacer – BMW B58 (M140I, M240I, 340I & 440I)

BMS WMI Billet Spacer – BMW B58 (M140I, M240I, 340I & 440I)With most meth injection application..

£117.00

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

BMW N55 Racing Replacement Chargepipe for F Chassis M135i M235i M2

BMW N55 Racing Replacement Chargepipe for F Chassis M135i M235i M2

Racing Replacement Chargepipe for F Chassis N55 BMW M135i M235iFor 2012+ F chassis N55 motors. Upgr..

£224.95

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