Cummins 3393472 Injector Fuel Supply Tube

The Cummins 3393472 is a fuel injector supply tube designed for high-pressure common rail and mechanical injection systems on 5.9L ISB and QSB engine platforms. It delivers pressurized fuel from the fuel rail or injection pump to the injector inlet. Manufactured from ST52 grade galvanized steel tubing, the component provides high tensile strength and corrosion resistance required for ultra-low sulfur diesel (ULSD) and biodiesel blends. The tube features precision-formed bends and OEM-specification end fittings to ensure leak-free sealing at the injector and rail connections. This part is a direct replacement for the original equipment tube on 2003-2009 Dodge Ram 2500 and 3500 series trucks equipped with the 5.9L Cummins diesel engine.