Selecting the right turbocharger for Cummins engines involves matching displacement, compressor/turbine specs, and application needs. Key brands like Holset (OEM), BorgWarner, and Garrett offer models for stock to high-power builds. Consider boost response, heat management, and supporting mods (fuel system, tuning). Choose Holset for stock/mild upgrades, BorgWarner/SXE for 500-700HP, and compounds/Garrett for extreme power.