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The Goodman 4053501S is a genuine OEM chimney/flue collar designed for the GMPE125-5A gas furnace. The collar forms the transition between the furnace flue outlet and the vent connector, providing a secure, correctly sized fit that helps ensure proper draft and safe combustion-gas venting. A corroded, missing, or ill-fitting collar can lead to flue-gas leakage and draft problems.
The OEM Goodman collar matches the furnace's exact flue-outlet diameter and mounting pattern, so it seals correctly the first time. A generic collar often requires trimming or extra sealant and may not align with the factory vent opening. For a component tied to combustion venting safety, the OEM part is the right choice.
Easy (1 of 3). With the furnace off and cool, remove the vent connector, replace the collar, and reattach the vent with the appropriate fasteners/sealant. Roughly 20 minutes. Confirm a tight, leak-free connection and check draft after reinstalling.