1652 1994-2002 Ford 281/4.6L water pumpWe designed a impeller for the Ford 281 4. 6L SOHC and DOHC with an increased vane count and a reduced impeller vane clearance to reduce engine temperatures. 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