High-CFM 11 Blade Cooling Fan OE Z530-38-65-8T11 8 Holes for 4D31 Diesel Engine Kato HD450-7 Excavator Replacement Describe: This high-output 11-blade engine cooling fan (OE Z530-38-65-8T11) delivers maximum CFM airflow for Kato HD450-7 excavators with the Mitsubishi 4D31 diesel engine. The 11-blade configuration provides significantly increased cooling volume versus standard 8-blade designs, making it ideal for heavy-duty digging and demolition operations where engine