5579419PX Fuel Injector | Cummins ISX15 QSX15 XPI | Torque Diesel | Remanufactured

Torque Diesel remanufactured fuel injector, part number 5579419PX, for Cummins ISX15 and QSX15 engines with the XPI high-pressure common rail fuel system, EPA13 emissions era. The clean base number is 5579419, and this injector supersedes the earlier 2897320 and 4384363 numbers. Every unit is completely disassembled, inspected, and 100% end-of-line tested to OEM specification.

Key Features

• Completely disassembled and inspected — any component outside OEM spec is replaced, then components are cleaned and re-inspected
• 100% nozzle replacement on every unit
• Assembled by factory-trained technicians
• 100% end-of-line tested on OEM test equipment, to OEM specification, by OEM-trained technicians
• Restores OE fuel atomization and fuel delivery
• Remanufactured in the U.S. and Mexico, backed by more than 80 years of diesel fuel injection experience

Specifications

• Part number: 5579419PX
• Base part number: 5579419
• Component type: Fuel injector
• Condition: Remanufactured
• Fuel system: Cummins XPI high-pressure common rail
• Engine: Cummins ISX15 and QSX15, 15 L
• Emissions era: EPA13
• Sold as: each (the ISX15 is an inline-six and takes six injectors)

Warranty

Two-year unlimited-mileage warranty covering defects in materials and workmanship, plus up to $750 in labor coverage. Claims are handled through your local M&D location or the M&D warranty team.

Compatibility & Fitment

• Engines: Cummins ISX15 and QSX15, XPI fuel system, EPA13
• Equipment: Class 8 on-highway trucks and industrial equipment powered by the 15 L Cummins platform

Fitment gate — this is the single-cam ISX injector for the XPI fuel system. It will not fit dual-overhead-cam ISX engines, and it will not fit the earlier HPI fuel system. Confirm your engine is single-cam XPI before ordering.

Second fitment gate — the 15 L Cummins platform uses different injectors across emissions eras and CPLs. Confirm your engine serial number and CPL before ordering a full set.

Replaces: 2897320, 4384363

Conclusion

This is a Torque Diesel remanufactured XPI injector for the Cummins ISX15 and QSX15, superseding the earlier 2897320 and 4384363 numbers. Full disassembly, 100% nozzle replacement, and end-of-line testing to OEM specification on OEM equipment restore the fuel atomization and delivery the engine calibration depends on. Confirm your engine is single-cam XPI and verify your CPL before ordering.