Excavator Cooling Fan Blade 11 Blades 8 Holes OE Z530-38-65-8T11 Fit 4D31 Diesel Engine HD450-7 Replacement Parts Describe: The Z530-38-65-8T11 specification layout features an 11-blade upgrade option for the Kato HD450-7 excavator (Mitsubishi 4D31 engine). The "8T11" segment of the prefix code explicitly references the physical structure of the part: 8 bolt holes and 11 fan blades (as opposed to the standard 8-blade variation). Key Features: Vital Dimensions to Confirm