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The B4022700 is a genuine OEM 3-inch in-shot burner for the Goodman/Amana AMH80403ANBD 80,000 BTU gas furnace. In-shot burners direct the gas/air mixture into each heat-exchanger tube for clean, efficient combustion. Replace burners that are rusted, cracked, or carboned up, or when you find uneven flame patterns and delayed ignition. Most AMH80403 furnaces use one burner per heat-exchanger cell — order the matching quantity.
The OEM burner matches the factory orifice alignment and flame-crossover spacing, so ignition and flame travel stay reliable across all burners. Generic burners can shift the flame pattern and cause rollout or delayed ignition. For combustion components, OEM is strongly recommended.
Moderate — burners slide out of the manifold assembly after removing the burner box cover. Confirm orifice and crossover alignment on reassembly, and shut off gas and power before servicing.