1630 1965-1977 Ford 240 300 Big 6 water pumpFlowkooler designed a high flow water pump with a CNC machined billet impeller. With an increased vane count and a reduced casting to impeller vane clearance it achieves greater flow rates, higher head pressure and a more efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids. FlowKooler introduced the first hi flow pumps and continues to improve impeller design. Why is