MERCRUISER EXHAUST MANIFOLD by Sierra
Manifold for 3.0 Liter Engines 1990 and Newer using the "MERCARB" ,This has a single idle air adjusting screw. Included with the manifold are: gaskets, pipe plugs, fuel line, mounting hardware and Instructions. Riser mounting flange is square bolt pattern (2-13/16" x 3-1/16" bolt centers). This replaces older Mercury part #'s 806867A3, 806867A9, 806867A12 and 815560A5, 815560A7
Replaces OEM NEW PART NUMBER 860235A03 and OLD NUMBER 806867a3
Old Sierra Part Number: 18-1966 superseded to New Sierra Part Number: 18-1966-1
Sierra manifolds are painted, packaged and leak tested.