Holset 4089445 Turbocharger HX40G Assembly

The Holset HX40G turbocharger (Cummins part number 4089445) is a wastegate-controlled unit designed for the Cummins 6CT / 6CTA 8.3 liter inline-six diesel engine platform. It features a 60 mm compressor inducer and 82 mm turbine wheel configuration optimized for mid-range torque response in commercial vehicle duty cycles. This assembly replaces Cummins service part numbers 4035108, 4035109, 4035107, and 4035108H. The unit utilizes a floating thrust bearing system and water-cooled bearing housing for thermal management under sustained high-load operation. It is a direct-fit replacement for factory-equipped turbochargers on Dongfeng Tianlong flagship and Tianjin medium trucks powered by Cummins 6CT engines.