1681CI 1963-1977 Small Block Ford cast iron 5-9/16" water pump heater A bypass helps to circulate

A bypass helps to circulate the coolant in the block

3L International GenesisRE 1996-2002 444/7

5L PONTIAC BONNEVILLE 78-69 V8 403 6

no thermostat bypass hole

9L dodge aspen 80-76 V8 318 5

1681CI 1963-1977 Small Block Ford cast iron 5-9/16" water pump heater A bypass helps to circulateSmall block Ford running hot? Flowkooler designed a high flow water pump with a CNC machined billet impeller, 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