Holset 4046026 Turbocharger Assembly HX55W

The Holset HX55W turbocharger (Part Number 4046026) is a variable geometry turbocharger (VGT) engineered for Cummins ISM11, ISM, ISME, QSM11, and M11 series diesel engines. It features an electronic VGT actuator for precise boost control across the operating range. The unit utilizes a high-efficiency compressor wheel and turbine housing configuration optimized for heavy-duty truck and construction machinery applications. The center housing rotating assembly (CHRA) references part number 3580726. This assembly serves as a direct OEM replacement for Cummins part numbers 2843417 and 4956102, and is widely deployed in Sinotruk Howo, Shacman X3000, Dongfeng, and Foton heavy-duty trucks, as well as XCMG and Komatsu excavators equipped with Cummins M11/ISM powerplants.