Increase the responsiveness of your vehicle's engine, with the OTR Remanufactured Common Rail Fuel Injector with Expertise Built In™. To improve reaction time and overall fuel efficiency, this replacement component sprays a small amount of fuel directly into the combustion chamber. Symptoms of injectors that need replacement include thick exhaust, misfiring, and a stalling engine. FleetPride is your First Click in Heavy Duty®.