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The Goodman 4053501S Chimney Collar is the genuine OEM flue/vent collar for the GDS80703ANA 80% AFUE gas furnace and compatible Goodman/Amana models. This collar forms the sealed transition between the furnace flue outlet and the vent connector, ensuring combustion gases are safely and correctly routed out of the appliance. A cracked, corroded, or missing collar can cause vent leaks and failed inspections, so replacing it with the factory part restores a proper, code-compliant venting connection.
The OEM 4053501S is stamped to the exact flue diameter and mounting hole pattern of your furnace's induced-draft outlet, so it seats and seals without modification. Generic or universal collars often require trimming, extra sealant, or field bending to fit — introducing leak points on a combustion vent where a tight seal is safety-critical. For flue components, we strongly recommend the genuine OEM part.
Easy (1/5). Typically a few screws and a fresh bead of high-temp sealant. Always shut off gas and power before servicing, and confirm no flue-gas leaks after reassembly. If you are unsure about venting integrity, have a licensed HVAC technician verify the connection.