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Bard part 9043-463 is an OEM venturi and manifold assembly (Bard 4117000) used in select Bard wall-mounted HVAC gas heating sections to help deliver the correct gas-air mixing and distribution to the burner system for stable ignition and proper combustion. If your unit is showing ignition issues, uneven flame characteristics, or you are replacing related gas train components, installing the correct Bard venturi and manifold helps restore factory-specified operation and fit without improvising with universal parts. Verify compatibility by matching 9043-463 and 4117000 to your unit model and serial number in the Bard parts list or service manual before ordering.