Holset 4050107 Turbocharger HX40W Assembly

The Holset HX40W is a water-cooled, wastegated turbocharger designed for Cummins mid-range diesel engines. This unit features a mechanical wastegate actuator for precise boost control and a water-cooled turbine housing for enhanced thermal durability in heavy-duty cycles. It serves as a direct replacement for Cummins part numbers 4050107 and 4051143, alongside a broad range of OEM cross-references including 4033647H, 4048407H, 4049368, 4051323, and 3785409N. Primary applications span Cummins 6CT8.3 mechanical engines, ISC/QSL electronic platforms, and ISLe/6LTAA industrial variants rated from 300 to 375 HP. The assembly is widely deployed in on-highway heavy-duty trucks (Kenworth, Peterbilt, International), construction machinery (Komatsu PC300-8 excavators), agricultural equipment, and industrial power units. The CHRA cartridge (PN 3535324) is serviceable separately. Verify specific engine CPL and emission configuration prior to installation.