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The B4022700 is a factory-original 3-inch in-shot gas burner built for the Goodman & Amana AMS81005CXAB 80% AFUE multi-speed furnace and related models using this burner rack. Each in-shot burner meters and directs the gas/air mixture into one tube of the heat exchanger, where it's lit by carryover from the igniter and adjacent burners. Precise venturi geometry keeps the flame stable, quiet, and correctly colored — essential for clean combustion and full-rated efficiency. Replace burners that are rusted, cracked, sooted, or producing a lazy yellow flame.
The genuine B4022700 is stamped to the exact port size, throat, and mounting slot Goodman engineered for this manifold and orifice set. Off-spec burners can shift the air/fuel ratio, causing rollout, delayed ignition, sooting, or CO issues. For a combustion component, OEM is strongly recommended.
Moderate (3/5). Shut off gas and power, remove the burner-box cover and manifold, then lift each burner off its locating slot and reseat the new one squarely over the orifice. Best performed by an HVAC professional who can verify manifold pressure, flame appearance, and combustion after the swap.