The JB4 is a true user adjustable plug and play solution.  Power Gains: Starting at peak 370bhp and 380ft lb.

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.

Stored maps available for 91/95ron and 93/98ron for manual and DSG