463981-001 - HP Fan and Heatsink for Workstation Z400 463981-001 - HP Fan and Heatsink for Workstation Z400 $103.50
535586-001 - HP Processor Heatsink for Workstation Z400 Z600 Z800 535586-001 - HP Processor Heatsink for Workstation Z400 Z600 Z800 $222.58
573203-001 - HP Liquid Cooling Heatsink Module for Z400 Workstation 573203-001 - HP Liquid Cooling Heatsink Module for Z400 Workstation $249.32