This is a vintage 1955-1956 Ford Truck Mercury ECE9431B LH 292 Y Block Exhaust Manifold designed for in-line cross-flow cylinder heads. The manifold is bolt-on style and made of cast iron in a brown color. It includes a stud and is intended for single exhaust models. This OEM used part does not have an oxygen sensor port and is manufactured by Ford in the United States. It is a specific fit for the left front side of the vehicle and is suitable for gasoline fuel type applications.