Power Reimagined: 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 boost unit—comprising the turbine, compressor, and core—designed for reinstating optimal airflow and performance in QSB4.5-173 engines produced between 2015 and 2022.
Why opt for this OEM Turbo Assembly?
This turbo aligns perfectly with factory intake and exhaust mounting points, as well as ECM controls—ensuring a seamless installation without extra calibration. Choosing the genuine unit helps avoid mismatched spooling behavior, error codes, or performance loss that often come with non-conforming alternatives.
Key Benefits
✅ OEM drop-in fit for Cummins QSB4.5-173 engines (2015–2022)
✅ Restores boost and throttle response to specification
✅ Delivered fully assembled—includes turbine, compressor, and core
✅ Built to endure high temperatures and repeated load cycles
✅ Helps eliminate smoke, stress signals, and performance degradation
Applications
Perfect for trucks, generators, and equipment powered by QSB4.5-173 engines, especially where reliable airflow is essential for payload, duty cycles, or extended runtime.
Installation Notes
Start by letting your engine fully cool. Remove the old turbo and inspect intake and exhaust connections for cleanliness. Install the new OEM turbo using the correct gaskets and bolts, torquing to spec. After the swap, clear any stored system codes, test for proper boost pressure, and observe for smooth throttle response during operation.
Final Thoughts
If your QSB4.5-173 engine is lagging, smoking, or underperforming, the OEM 5321671RX Turbo Assembly delivers the boost back. Precision-made, performance-ready—available now at Tamerx. Let me know if you’d like related support parts or maintenance recommendations!