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The Goodman 4053501S is a genuine OEM chimney collar (vent/flue collar) designed as an exact-fit replacement for the Goodman/Amana AMS80704BXAA gas furnace. This collar forms the transition point where the furnace flue outlet connects to the vent pipe, ensuring a secure, properly aligned seal for safe combustion-gas venting. A damaged, rusted, or missing collar can allow flue gases to escape and should be replaced promptly.
Because this collar is part of the venting/combustion path, a genuine Goodman OEM part is strongly recommended. OEM matches the flue diameter and mounting flange exactly, preserving the certified vent seal. Generic substitutes risk misalignment and leakage of flue gases.
Moderate. Involves detaching the vent pipe and refastening the collar to the furnace cabinet. Because it affects venting safety, professional installation is recommended. Always shut off gas and power first.