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JB4 Group 4:
The JB4 is a true user adjustable plug and play solution for Gen3 Jetta GLI and Turbo Beetle. Power Gains: Starting at 55bhp and 60ft lb with 91 octane/95Ron with + 4.0 psi boost over stock on the default setting. Up to 80bhp and 80ft-lb with bolt on modifications, higher octane and boost adjustment with the optional BMS Data Cable.
The JB4 features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air/fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water/meth control, and much more.
The unit can be used with our JB4 Bluetooth Connect kit providing for full in car engine parameter display, map switching and adjustment The JB4 Beta can also be stacked over flash tuning allowing for fine tuning as well as meth control with safety measures in place and full logging.
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