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This genuine OEM chimney (flue) collar is the factory vent-connection fitting for the Goodman / Amana AMH81405DXAA gas furnace. The collar seats on the furnace outlet and provides the transition to the vent pipe, sealing the flue gas path from the induced-draft blower to the chimney or vent connector. A corroded, warped, or missing collar can allow flue-gas leakage and disrupt proper draft — replacing it restores a safe, sealed venting connection.
The OEM 4053501S matches the furnace outlet diameter and screw-hole pattern exactly, so it drops in without cutting or fabricating. Generic collars often need trimming or extra sealant to fit and may not align with the factory fastener locations. Because this part is part of the combustion venting system, an exact OEM fit is the safest option.
Easy (1 of 5). Turn off power and gas, remove the vent connector, unfasten the old collar, and secure the replacement with the factory screws and approved sealant. About 15–25 minutes. Always leak-check draft and combustion after any venting work.