This Cummins Fuel Doser 7th Injector 4309349RX is a genuine OEM part designed for precise fuel dosing for optimal aftertreatment performance. It is compatible with various Cummins engines and is primarily used for HPI fuel systems on EPA07 Automotive 15 liter ISX/QSX engines. The part is remanufactured to be identical to brand new Cummins Genuine parts to meet original specifications, ensuring high quality and reliability.