Boost Restored: Cummins QSB4.5-173 Turbo Assembly (2015–2022), OEM 5321671RX
What is it?
The Cummins QSB4.5-173 Turbo Assembly (OEM 5321671RX) is the complete turbocharger unit—including turbine, compressor, and core—designed to reinstate proper airflow and performance in QSB4.5-173 engines produced between 2015 and 2022.
Why opt for this OEM Turbo Assembly?
This genuine turbo assembly fits directly into factory-matched intake and exhaust connections and integrates seamlessly with the engine’s stock calibration—no tuning required. Installing the OEM unit helps prevent fitment issues, boost inconsistencies, or malfunction alerts common with aftermarket replacements.
Key Benefits
✅ Direct OEM drop-in for Cummins QSB4.5-173 engines (2015–2022)
✅ Restores original boost pressure for improved acceleration and efficiency
✅ Comes fully assembled—turbine, compressor, and core are pre-aligned
✅ Built to endure high-temperature cycles and demanding workloads
✅ Minimizes problems like exhaust smoke, throttle lag, and engine derates
Applications
Perfect for agricultural, construction, and industrial equipment powered by QSB4.5-173 engines, especially in demanding, long-duration operating environments.
Installation Notes
Ensure the engine has cooled before starting. Remove the existing turbo, inspecting and cleaning the associated piping and flanges. Install the OEM assembly using the correct gaskets and bolts, tightened to spec. Afterward, reset filters and diagnostics, then conduct a test drive to confirm proper boost levels and throttle response.
Final Thoughts
If your QSB4.5-173 engine is showing signs of sluggish performance, excessive smoke, or boost pressure faults, this OEM turbo assembly is the exact upgrade to restore power and reliability. Ready for dispatch now at Tamerx—your streamlined solution for system performance.