Cummins QSM11 Fuel Injector 2003-2009: OEM 4903319RX ( Set of 6 )

Complete Fuel Delivery Solution for Cummins QSM11 Engines

What is it?
The OEM 4903319RX injector set includes six factory‑spec fuel injectors designed for Cummins QSM11, ISM11, and M11 engines from 2003 to 2009. These injectors deliver accurately pressurized diesel fuel to each cylinder, preserving combustion integrity and engine timing across all six cylinders.

Why choose OEM 4903319RX (Set of 6)?
Replacing all six injectors simultaneously ensures balanced fuel delivery throughout the engine. These OEM injectors meet Cummins’ exact calibration standards for spray pattern, flow rate, and electrical behavior—ensuring seamless compatibility with ECM controls and emissions systems, without common mismatches that arise from aftermarket substitutions.

Key benefits
✅ Balanced Fuel Distribution across all cylinders
✅ Engineered for QSM11, ISM11, M11 Applications (2003–2009)
✅ OEM‑Specified Spray Pattern and Flow for consistent combustion
✅ Reduces Emission Errors and Performance Faults
✅ Durable Design suited to high‑pressure, high-temperature diesel use

Applications
These injectors are ideal for use in heavy-duty trucks, construction equipment, and industrial generators powered by Cummins QSM11, ISM11, or M11 engines. They’re especially suited for service fleets relying on dependable combustion and emissions integrity across all cylinders.

Installation Notes
Professional installation is recommended. Replace all seals and washers, clean injector bores, and inspect wiring connectors before installation. Follow Cummins torque specifications and perform calibration via diagnostic tools to clear fault codes and verify injector balance rates immediately after installation.

Final Thoughts
The OEM 4903319RX injector set provides a factory-matched solution for restoring fuel system symmetry and reliability across Cummins M11-series engines. With genuine calibration and matched cylinder delivery, it supports consistent engine working conditions and minimal emissions interruptions over time.