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.
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.