Product Name
$0.00
✅ In Stock
🚚 Ships Today
🔒 OEM Certified
🔄 30-Day Return
Same-day dispatch if ordered by 3PM CST
Free shipping on orders $75+
Check compatibility before ordering
IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The genuine OEM Goodman B4089343 is a #43 natural gas burner orifice (spud) for the Goodman GSMS100-4 gas furnace and compatible Goodman/Amana models. Threaded into the manifold, this precision-drilled brass orifice meters the exact volume of gas delivered to each burner. The #43 drill size is matched to the furnace's BTU input and supply-gas type, making correct orifice sizing essential for proper flame characteristics, clean combustion, and safe, efficient operation.
The genuine Goodman B4089343 is drilled and threaded to the precise factory specification, so BTU input and flame quality remain within design tolerance. An incorrectly sized or off-spec generic orifice can cause under- or over-firing, sooting, or unsafe combustion. For a gas-metering component, the OEM orifice is the safe choice — always verify the correct drill size for your fuel type and altitude.
Moderate (2/5). Shut off gas and power, remove the burner or manifold as needed, unthread the old spud with a properly sized socket, and install the new orifice — avoiding cross-threading or over-torque. About 20–30 minutes; leak-test all connections after reassembly.