Holset 4049028 Turbocharger HX40W Assembly

The Holset HX40W turbocharger model 4049028 is a wastegated turbocharger assembly designed for Cummins 8.3 liter engine platforms including 6CT, 6CTA, 6CTAA, and ISL variants. It utilizes a fixed geometry turbine housing with an integrated pneumatic wastegate actuator for boost pressure control. The compressor stage features a 60mm inducer and 80mm exducer wheel configuration optimized for the 8.3L displacement airflow requirements. The turbine wheel features a 70mm inducer and 62mm exducer. The center housing rotating assembly (CHRA) is water-cooled and oil-lubricated with a 360-degree thrust bearing design. This unit interfaces via a T4 turbine inlet flange and a 4-bolt turbine outlet flange. Oil feed connection is M14x1.5 thread; oil drain is a 3/4 inch hose barb. Coolant ports are integrated into the center housing for thermal management. This assembly serves as a direct replacement for Cummins OEM part numbers 3597581, 3597582, and 4089328. Manufactured to Holset OEM specifications for durability in high-cycle construction machinery duty cycles.