The present invention generally relates to methods and apparatus for use in exhaust manifold assemblies of large diesel engines, such as ships, locomotives and the like. In one aspect, a screen for use in an exhaust manifold assembly is provided. The screen includes a plate formed in a concave shape. The plate has a plurality of apertures and a plurality of radially oriented closed slots formed therein. The screen further includes a band on an outer perimeter of the plate. In another aspect, a reducer assembly for use in an exhaust manifold assembly is provided. In yet a further aspect, a method of using a screen in an exhaust manifold assembly is provided.