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The Goodman 4053501S Chimney Collar is a genuine OEM flue-vent connector for the AMS81405DNAA 80% AFUE gas furnace. This collar forms the sealed transition between the furnace draft hood and the vent pipe, ensuring combustion byproducts are safely routed to the chimney. A damaged, rusted, or missing collar can cause vent leaks, flue-gas spillage, and draft-proving faults — replacing it restores a proper, code-compliant exhaust connection.
The OEM 4053501S provides factory-exact diameter and flange geometry for a leak-free, warranty-compliant vent seal. Our generic-equivalent collar matches the fit at a lower price — a practical choice for out-of-warranty repairs where a precise vent connection is still essential.
Easy (2/5). Disconnect the vent pipe, remove the old collar, seat and fasten the replacement, then reconnect and check the draft. Typical time: 20–30 minutes. Always confirm a solid vent seal before returning the unit to service.