Brand new 4 barrel cast iron intake manifold used in GM Marine, Mercruiser, Volvo, OMC, Marine Power, and Crusader 4.3L Vortec marine applications. Fits years 1997-present. This is an 8 bolt Vortec intake manifold. This intake is manufactured of the highest grade cast iron. Resists salt water corrosion that aluminum intakes experience & corrosion caused by natural gas and other dry fuels. This is an aftermarket intake manifold that we had made for our complete engine packages.