Cummins 5321612 Turbocharger Kit Holset HX82 HX83

The 5321612 turbocharger kit is a Holset HX82/HX83 frame assembly designed for Cummins QSK60, QSK45, and QSK78 heavy-duty diesel engines. It utilizes a cast iron turbine housing and aluminum alloy compressor housing construction to withstand high exhaust gas temperatures and boost pressures typical in mining, marine, and power generation duty cycles. The kit includes the turbocharger cartridge (CHRA), actuator, gaskets, and mounting hardware required for complete installation. Engineered to meet OEM specifications for rotational balance and aerodynamic performance, this unit restores intake manifold pressure and engine torque output. It interfaces with the engine lubrication and cooling systems via standardized flange connections. The wastegate or variable geometry mechanism (depending on specific sub-model HX82/HX83) regulates boost pressure across the operating range. Cross-references include Cummins OEM numbers 4309430, 3784397, 3784746, 3784747, 4047291, 4955686, and Holset identifiers HE851, HE800FG.