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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner designed for the DDS81155CXA gas furnace and compatible Goodman/Amana heat exchangers. Each in-shot burner directs the gas/air mixture into one tube of the heat exchanger, where it is lit by the igniter or carried across by cross-lighting. Corroded, rusted, or clogged burners cause rough ignition, delayed light-off, flame rollout, and poor flame quality. Replace as a matched set for even heating.
Genuine Goodman burners are stamped to the exact port pattern and length that matches the furnace's manifold spacing and heat-exchanger inlets, ensuring correct flame carry-over and safe combustion. Generic burners may seat improperly and disrupt cross-lighting. For combustion parts we strongly recommend OEM.
Moderate — Plan on 30–45 minutes for a full burner set. Shut off gas and power, remove the burner box cover, disconnect the igniter/flame sensor, slide out the manifold, and swap the burners onto the mounting rail. Verify orifice alignment and check for proper flame after restart.
Gas appliance repair carries safety risk. If you are not comfortable working with gas components, hire a licensed HVAC professional.