Heavy-Duty Power, Tactical Precision: Cummins QSM11 Turbo Assembly (2003–2009) – OEM 4089856RX
What is it?
The Cummins QSM11 Turbo Assembly (OEM 4089856RX) is a complete turbocharger replacement engineered for QSM11, ISM11, and M11 engines with 10.8L displacement. It includes the turbine, compressor housing, bearing cartridge, and necessary mounting components—designed to deliver peak airflow and engine efficiency in both industrial and marine Tier III applications.
Why choose OEM 4089856RX?
This genuine Cummins ReCon® turbo assembly meets factory performance specifications, with proper balance, thermal tolerances, and materials designed for high-duty environments. Unlike aftermarket units, it’s guaranteed to bolt in and work seamlessly with 2003–2009 QSM11, ISM11, and M11 engines—without fitment or boost inconsistencies.
Key Benefits
✅ Factory-matched turbo assembly designed for Cummins QSM11, ISM11, and M11 engines (2003–2009)
✅ Optimized boost performance enhances torque, response, and fuel economy
✅ Precision-balanced unit built to withstand marine and industrial operating conditions
✅ Compatible with your existing OEM actuator and boost control system
✅ Direct bolt-on installation—no machining, retrofitting, or recalibration needed
Applications
This turbo assembly is ideal for both marine and industrial Tier III platforms powered by QSM11 engines—ranging from tugboats, workboats, and generator sets to construction, mining, and drilling equipment. It’s especially suited where continuous high load and thermal resilience are demanded.
Installation Notes
Allow the engine to cool fully, then inspect oil feed and return lines for blockages. Remove the old turbo carefully—preserving existing actuator linkages if reused—and install the OEM assembly per Cummins torque specifications. Reuse or replace gaskets, tighten mounting bolts, and ensure oil flow is restored before startup. After finishing, clear any diagnostic trouble codes and test boost response under load.
Final Thoughts
If your QSM11, ISM11, or M11 engine is showing signs of boost loss, turbo noise, oil seepage, or power degradation, the Cummins 4089856RX Turbo Assembly is your OEM-grade solution. Built for longevity and precision, it restores factory performance and airflow reliability. Available now at Tamerx—ready to ship and backed by Cummins quality assurance.