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The 0163F00018 is a genuine OEM natural gas burner orifice (spud) for the Amana/Goodman AMVC81005CNAA gas furnace. This precision-drilled brass fitting threads into the manifold and meters the exact volume of natural gas delivered to each burner. Orifice bore size directly controls the furnace's BTU input, so using the correct OEM spud is essential for proper combustion, flame quality, and rated efficiency.
Gas orifices are drilled to a specific bore diameter matched to fuel type, altitude, and the furnace's input rating. The OEM 0163F00018 guarantees the factory-specified gas flow. Generic or mis-sized orifices can cause over- or under-firing, sooting, delayed ignition, or unsafe combustion. For any fuel-metering component, only the exact OEM orifice is acceptable.
Moderate (3/5). Shut off gas and power. The orifice threads out of the manifold with a properly sized socket or wrench; take care not to distort the soft brass or damage the manifold threads. Apply appropriate thread sealant per the manufacturer, reinstall, and leak-check every joint with soap solution before firing. Because this is a live-gas component, homeowners uncomfortable with gas piping should have a licensed technician perform the work.