Cummins 3930392 Injector Fuel Supply Tube

The Cummins 3930392 is a precision-engineered injector fuel supply tube designed for the Cummins 8.3L engine series including 6CT8.3, 6CTA8.3, and 6CTAA8.3 models. This component delivers high-pressure fuel from the injection pump to the fuel injectors, ensuring accurate fuel metering and combustion efficiency. Constructed from high-strength steel tubing with corrosion-resistant coating, it withstands the extreme pressures and thermal cycles inherent in heavy-duty diesel fuel systems. The tube features OEM-spec flared or threaded end connections for leak-free sealing. This part serves as a direct replacement for Cummins OEM 3930392 and is applicable in construction machinery such as Hyundai R300LC-9S and R320LC-7 excavators equipped with Cummins 8.3L power units.