The Industry's only Cast Iron Electrodeposition Coated direct replacement exhaust products. This product is not only coated on the outside surface but on all inner surfaces including the water jacket. For late model inboard/outboards. Replaces Mercruiser # 44354, 807914 and 807988 on 4.3L V6, 5.0L.5.7L V8, and 454/502 big block V8 engines. Includes mounting kit with gaskets and fasteners. Technical Information.... Product Diagram....

NOTE: If your engine is equipped with the dry joint exhaust system (V8 serial #0m600000 and above, V6 serial #0m615000 and above), THIS IS THE WRONG RISER; you must purchase the Mercruiser OEM riser.