Plug in module jet kit with 4 selectable base fuel curves that can be modified to suit a wide variety of modifications. Fuel mixture can be richened or leaned as required with the 3 adjustment meters: LOW, MID, HIGH. Factory OEM connectors for easy installation. No PC needed for selecting or adjusting the fuel curves and no modifications to the stock ECU. Removing the F.I. POWERBOX returns the vehicle to the factory settings. Improved engine operation with better throttle response and more power!