1775 1971-1990 Buick Cadillac Chevy GM Olds Pontiac 6" tall water pump for AC carsDO NOT MIS ORDER ALWAYS CHECK THE PUMP HEIGHT Flowkooler high flow pump 1775 for the 455ci motor has a CNC machined billet impeller designed with an increased vane count and a reduced casting to impeller 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