Holset 4029170 HX40W Turbocharger Assembly

The Holset HX40W is a water-cooled, internally wastegated turbocharger designed for medium to heavy-duty diesel engines up to 12.0 liters displacement. It features a compressor inducer diameter of approximately 60mm and a turbine housing with a T4 flange configuration. The unit utilizes a floating bearing system lubricated by engine oil and cooled by engine coolant. The internal wastegate actuator is pneumatic, calibrated for specific boost pressure curves per OEM application. This assembly includes the center housing rotating assembly (CHRA), compressor housing, and turbine housing. Manufactured by Holset (Cummins Turbo Technologies) at the Wuxi, China facility. It serves as original equipment for Cummins C-series engines (6CT, 6CTA, ISC, ISL, QSC, QSL) and Yuchai YC6L/YC6J/YC4D series engines. Compatible with Sinotruk Howo, Dongfeng, and Dodge Ram heavy-duty truck platforms. Cross-references multiple Holset service part numbers and OEM part numbers across Cummins, Yuchai, and Sinotruk catalogs.