The Adjuster from Attitude Performance Products (distributed through XDP Diesel) is one of the only power-on-the-fly systems available for the older 12V Cummins-powered trucks. Thanks to an in-cab control knob, owners now have full control of fuel plate travel to adjust fueling output of the P7100 injection. Having the correct fuel rate when you need it means more power, better fuel efficiency, and lower smoke output.