Cummins 4955240 Turbocharger Assembly GTA5523BS

The Cummins 4955240 is a Holset GTA5523BS variable geometry turbocharger (VGT) designed for 15-liter displacement diesel engines including the ISX15, QSX15, X15, QSK15, and ISZ13 series. It features an electronic actuator controlled by the engine ECU for precise boost management across operating ranges. The unit utilizes a water-cooled center housing with integrated oil feed and drain passages. Compressor and turbine wheels are optimized for high-efficiency airflow at rated power outputs up to 755 HP. This assembly replaces Cummins OE part numbers 2868728, 3104765, 3104766, 3104395, and 3104454. It is a direct fit for Case IH STX500 and STX530 agricultural tractors equipped with Cummins QSX15 power units. The turbocharger is manufactured to OEM specifications for durability in heavy-duty trucking, construction machinery, and agricultural applications.