BARR MC-1-58759 inline 6-cylinder manifold. Replaces original Mercruiser manifold 58759A1, Popular on 165-HP in-line 6-cylinder engines 250 cu.in. engines. It will accept original linkage, end plates, carb adapter, riser and fittings. Includes raw water gaskets and all mounting hardware. NOTE: riser mounting flange with square bolt pattern (2-13/16" x 3-1/16" bolt centers). Replaces OSCO 8759 and Sierra 18-1960-1. Made in USA, 3-year limited warranty.