Increase the responsiveness of your vehicle's engine, with the OTR Remanufactured HEU "BN" Diesel Fuel Injector with Expertise Built In. By utilizing a specialized design, this replacement component is able to spray a small amount of fuel directly into the combustion chamber to improve reaction time and overall fuel efficiency. A new injector is often needed when symptoms such as thick exhaust, misfiring, and a stalling engine appear. FleetPride is your First Click in Heavy Duty.