MerCruiser GM 327 350 427 1967-1981 Exhaust Elbow Riser 47877 76668A 3, 76668A 1, 72964A 1, 47877A 1, 47877A 4. Alternate part numbers 76668A3, 76668A1, 72964A1, 47877A1, 47877A4. Casting number 47877. Good condition from freshwater use. Minimal rust & corrosion. Gasket residue on flange to manifold. See pictures.

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