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FlowKooler water pump impellers prevent engine overheating through higher flow rates and increased system pressure.

Restoring Pumps with a Hi Flow Impeller

If you are interested in a rebuild you are probably (A) restoring a numbers-matching car or (B) cannot find a new pump anywhere and either want a conventional pump or have experienced the benefits of hi flow. We have been helping restorers for 40 years in the construction of our radiators so it was an easy decision to use our hi flow impellers designs for numbers-matching cars and unavailable castings. 
Founded in 1959 in Italy, SPAL has been designing, producing and marketing high-performance axial fans and centrifugal blowers for over 30 years.
Robertshaw makes the only hi flow balanced sleeve thermostat with stress-free construction, the Power Pill®, one-piece bypass poppet, short-stroke piston and contoured strut.
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