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This Burger MotorSports JB4 is a plug and play box which enables a driver to adjust fuel maps on the fly for massive power gains. The default Map 1 will introduce a massive 45BHP gain - you can then use the included Bluetooth adapter to change maps on the fly using a mobile device for even more power gains. Comes with the bolt-on Bluetooth kit pre-installed for phone app connectivity for additional maps & power gains. Incredibly easy to install and use. No need to upgrade engine before install No need for DSG remap I have used the box for about a month - feel free to message any questions. I am based in Enfield, North London. ---Happy for you to bring your car and I'll help you to install for free--- Official description: The JB4 is a true user adjustable plug and play solution for all MQB based models in the VW Audi Group range. Power Gains: Starting at 45bhp and 45ft lb with 91 octane with + 4.80psi boost over stock on the default setting. Up to 100bhp and 70ft-lb with bolt on modifications, higher octane and boost adjustment with the optional BMS Data Cable (You are getting the Bluetooth kit instead worth £140) APPLICATIONS • Audi S3 8V • Audi S3 Facelift • Audi TTS 8S • VW MK7 Golf R • VW GTI Clubsport ED40 • VW MK7.5 Golf R • VW Aerton • B8 Passat 2.0T 280hp • Seat MK3 Leon Cupra • Seat Ateca Cupra