47-3577 WATER PUMP F/GM 409-502 CID (SIE 3577)

Marine Water Circulating Pump for early model Chevy Big Block V-8 454 CID, 7.4L Engines using a stamped steel timing cover. Features ... * Brass Bi-directional impeller. * All mounting hubs checked for proper roll-out. * All new pump body castings, not rebuilt units. * Produced domestically at Sierra's Clearwater, Florida facility. * Stainless steel backing plate and attaching hardware. * All pumps are vacuum tested to insure proper operation.