863457A2 for Mercury Mercruiser Thermostat Housing Assembly 4.3 5.0 5.7 350 MAG

Replaces part number 863457A2. Fits both alpha and bravo 350, 377, 383 MAG, 4.3L, 5.0L, 5.7L, 6.2L MPI engines that have the water distribution housing. For raw water cooled engines with 3-point drain system.

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