Holset 4051389 Turbocharger HX40W

The Holset HX40W turbocharger (part number 4051389) is a wastegated unit designed for medium to heavy-duty diesel engines. It features a T4 turbine inlet flange and an integrated wastegate actuator for boost pressure regulation. The compressor wheel utilizes extended tip aerodynamic design for high efficiency across a broad operating range. This assembly replaces the previous generation part number 4051053. The unit is constructed with a high-temperature nickel-alloy turbine housing and a precision-balanced rotating assembly to ensure reliability under high thermal and mechanical stress cycles. The bearing system is fully floating, lubricated by engine oil pressure.