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The Goodman B4089343 Burner Orifice #43 is a genuine OEM replacement spud designed for the ADV81155CXBB gas furnace. The orifice meters the exact volume of fuel delivered to each burner, so a worn, clogged, or incorrectly sized spud is a common cause of lazy yellow flames, delayed ignition, sooting, and poor heat output. Installing the factory-specified #43 drill size restores clean, efficient combustion.
This is a genuine Goodman OEM orifice, drilled and gauged to factory tolerance. Generic or improperly sized orifices can over- or under-fire the burner, wasting fuel and risking incomplete combustion. For a safety-critical gas component, the exact OEM size is strongly recommended.
Moderate — Requires shutting off gas, removing the burner assembly, and swapping the spud with a wrench. Gas-line work should be performed by a qualified HVAC technician, and the connection must be leak-tested after service.