The Dorman Hydrocarbon Injector Nozzle ensures you are Ready for the Road Ahead™ by providing an increased voltage to open and close the injection valves in order to both control the injection timing and the fuel amount that enters into the injection valve. Restore your vehicle’s aftertreatment system with the ideal heavy duty hydrocarbon injector nozzle replacement. Failure to replace the air dryer during regular maintenance intervals can lead to failure of the regulator, module, and the air dryer. Replacing all three parts together minimizes premature faults in the hydrocarbon dosing system. FleetPride is your First Click in Heavy Duty®.