Fits:  Sierra 18-3583 Circulating Water Pump GM (Chevy) 4.3-L, 5.0-L and 5.7-Liter early models with stamped steel timimg cover V-6 and Small Block V-8 Engines. Sierra Marine circulating pump has Bi-rotational bronze impeller and stainless steel backing plate. Includes Mounting Gaskets. 1-year limited warranty.
Replaces Mercruiser 60658, Volvo Penta 835390, 856364, Mallory 9-42606