Cummins ISX15 Fuel Injector 2018-2021: OEM 5579421RX ( Set of 6 )

Complete Fuel Injector Set for Late-Model Cummins ISX15 Engines

What Is It?

This set of six OEM 5579421RX fuel injectors is designed for Cummins ISX15 engines manufactured between 2018 and 2021. These injectors deliver precisely metered fuel to each combustion chamber, ensuring even cylinder working conditions, reliable combustion, and consistent engine function.

Why Choose OEM 5579421RX (Set of 6)?

Replacing all six injectors at once ensures uniform working conditions across the engine and eliminates inconsistencies that can arise from mixing old and new components. The OEM 5579421RX injectors are factory-calibrated for the ISX15 platform, offering a seamless fit and dependable operation in demanding conditions.

Key Benefits

✅ Full Engine Coverage: Set of 6 matched injectors restores balanced fuel delivery
✅ Made for ISX15 (2018–2021): Precision-engineered for late-model Cummins ISX15 engines
✅ OEM-Calibrated: Maintains correct spray pattern, timing, and flow rate
✅ Durable and Reliable: Built to work under high pressures and long-duty cycles
✅ Direct Fit Replacement: Installs without modification using existing fuel system hardware

Applications

Ideal for commercial trucks, long-haul tractors, and fleet vehicles equipped with Cummins ISX15 engines from 2018 through 2021. This injector set is perfect for working conditions restoration, preventative maintenance, or resolving injector-related issues across all six cylinders.

Installation Notes

Professional installation is strongly recommended. Inspect all injector ports, fuel lines, and harnesses. Always install with new seals and torque components to Cummins specifications. After installation, conduct a diagnostic scan to clear fault codes and confirm injector balance rates.

Final Thoughts

The OEM 5579421RX Fuel Injector Set (6-Pack) offers a complete, factory-quality solution for restoring smooth, reliable fuel delivery in Cummins ISX15 engines. Built for long-term durability and system-wide consistency, this set helps reduce downtime and keeps your engine running at its best.