Provides 41% More Coolant Flow Than Original Water Pump Reduces Engine Temperature Up To 40º F Dark Cast Iron  Finish Requires Robert Shaw Hi-Flow Thermostat Beat the heat with this polished aluminum Stewart hi-flow water pump. Your Chevelle’s engine will run up to 40ºF cooler due to internal modifications on this water pump that produce an impressive 41% more coolant flow. It uses new, original equipment castings for a bolt-on fit and is compatible with all factory brackets. Must be used with Robert Shaw 180ºF hi-flow thermostat. Manufacturer’s 1-year warranty. The Short And Long Of Chevy Water Pumps Chevelle mechanical short style water pumps measure 5-5/8” high from the shaft down with the pilot shaft diameter measuring 5/8″. Long style Chevelle water pumps measure 7” high from the shaft down, and the pilot shaft diameter was 5/8″ as well. Do not mix and match pulleys from short and long water pump engines because this will cause pulley misalignment. An easy way to find out what style you have while your pump is still installed on the engine is to try to stick your hand between the water pump and timing chain cover. If you can slip your fingers in-between you have a long, if not you have a short.

Product Features

• Provides 41% More Coolant Flow Than Original Water Pump
• Reduces Engine Temperature Up To 40º F
• Your Chevelle’s engine will run up to 40ºF cooler due to internal modifications on this water pump that produce an impressive 41% more coolant flow
• Chevelle Water Pump, Big Block Cast Iron, Hi-Flo, Long, Stewart, 1969-1972