Flathead Water Pump Kit, Driver Side & Passenger Side, Fits 1937-1948 Ford & Mercury Flatheads

We got your back with our Speedway Flathead Water Pump Kit! Both water pumps and needed gaskets are included to simplify your Flathead engine build, so you can spend more time and money on other aspects of your project! Kit Contains: (1) Speedway Motors 1937-1948 Flathead Driver Side Water Pump. (1) Speedway Motors 1937-1948 Flathead Passenger Side Water Pump. Speedway Motors 1937-1948 Flathead Water Pumps Original Flathead water pumps have always suffered from unreliable bronze bushings and carbon seals. They almost always leaked and even Ford manuals warned mechanics not to tighten fan belts too tight. The excess slack allowed belts to slip and lose contact with the generator and water pump pulleys, causing more cooling and power problems. Speedway's completely new water pumps feature severe-duty roller and ball bearings, close tolerances and modular impellers to provide maximum flow and reduce cavitation. They also have modern ceramic seals on a heavy duty 5/8" shaft, making the assembly exceptionally strong and more efficient. All mounting areas are spot faced for improved fit and sealing. For Wide Belt Pumps. All-new high-nickel iron castings. Severe-duty roller and ball bearings. Ceramic seals on sturdy 3/4" shaft. High-flow modular impeller reduces cavitation. Gaskets included. For systems with 5/8" drive belts. Pulley diameter: 4.35" Belt Width: 0.63" Factory replacement for 1937-1948 Ford and Mercury cars and trucks. Includes gaskets. Water Pump Features