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The B4022700 is a genuine OEM 3 inch in-shot burner designed for Goodman GMP075-3 gas furnaces. Each in-shot burner injects a precise gas-air mixture into a heat exchanger tube for clean, complete combustion. Rusted, clogged, or misfiring burners cause delayed ignition, sooting, and uneven heating — replacing the full set restores a crisp, even flame across all burners.
The OEM B4022700 matches the exact venturi length and port pattern so flame carryover and ignition timing stay factory-correct. Generic in-shot burners are an economical option and often interchange, but confirm length and mounting-slot style before ordering to keep flame characteristics consistent across the burner rack.
Easy (2/5) — Burners typically slide onto locating tabs after removing the manifold. Replace as a matched set for even performance. Shut off gas and power first; budget 20–40 minutes for a full set.