Brand: Sierra Marine Manufacturer's Part Number: 18-3599-2 Part Type: Marine Circulating Water Pumps Product Line: Sierra Marine Circulating Water Pumps Summit Racing Part Number: RRA-18-3599-2 UPC: 808282374822 Pump Color: Black Pump Material: Iron Rotation: Clockwise or counterclockwise Quantity: Sold individually. Sierra Marine Circulating Water Pumps The water pump is the heart of your inboard or I/O cooling system. Sierra Marine offers circulating water pumps―quality replacements designed specifically for your GM， Ford， or Chrysler-based watercraft engine. Each pump is assembled using new castings， and features corrosion-resistant brass impellers， mounting gaskets， brass plugs and fittings， and is powdercoated for additional protection. Order the pump best suited to your marine engine.Key features: * Engineered to be an exact match to OEM pumps* Assembled with brass bi-directional impellers for installation on right hand or left hand rotating engines* Pumps include gaskets， brass plugs and fittings， stainless steel seal cup and spring (except Model 18-3599-1)， and stainless steel backplate (where applicable)* Powdercoated finish to stand up to harsh marine environment