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Genuine Goodman natural gas burner orifice (spud) for the AMVC950453BXAD modulating gas furnace. The orifice meters the precise volume of natural gas delivered to each burner, setting the air-fuel ratio for clean, efficient combustion. A worn, clogged, or incorrectly sized orifice causes lazy or sooty flames, poor efficiency, and potential lockouts. This drill-sized brass orifice is calibrated to the exact BTU input Goodman specifies for this furnace.
The OEM orifice guarantees the correct drill size for this model's rated BTU input and manifold pressure. An incorrect generic orifice changes the firing rate, risking incomplete combustion and carbon monoxide. Orifice sizing is safety-critical — always use the OEM part or a manufacturer-approved conversion kit.
Moderate (3/5) — Requires shutting off gas, removing the manifold or burner, and threading in the new orifice to spec. Best performed by a technician who can verify manifold pressure and flame appearance afterward. Roughly 30 minutes with proper tools and a combustion check.