JB4 Plug & Play Tuner

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The JB4 is a plug and play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its 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. 
BMW, Supra, Audi 8V A3 Racing Downpipes
For B58 N63 S55 S63R S58 S63 B48 B46 N55 N54 N20 Engine
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