{"product_id":"oem-goodman-burner-orifice-43-for-dms80704bna-b4089343","title":"OEM Goodman Burner Orifice #43 for DMS80704BNA — B4089343","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 Burner Orifice\u003c\/strong\u003e is a genuine OEM #43 drill-size gas orifice (spud) for \u003cstrong\u003eGoodman DMS80704BNA\u003c\/strong\u003e and compatible 80% AFUE natural gas furnaces. The orifice meters the precise volume of gas delivered to each in-shot burner, directly controlling BTU input and flame quality. A worn, enlarged, or debris-clogged orifice throws off the fuel-air ratio, producing sooting, delayed ignition, or improper firing rate. Replacing damaged orifices restores factory-rated heat output and clean combustion.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B4089343\u003c\/li\u003e\n\u003cli\u003eType: Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003eDrill Size: #43\u003c\/li\u003e\n\u003cli\u003eGas Type: Natural gas\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003cli\u003eFit: Goodman DMS80704BNA and compatible Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003eSold: Individually (one per burner — replace as a matched set)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003egenuine Goodman OEM orifice\u003c\/strong\u003e is precision-drilled to the exact #43 diameter your furnace was rated for, guaranteeing correct gas flow and BTU input. Generic orifices with even slightly off bore sizes can over- or under-fire the furnace, causing efficiency loss or safety issues. For accurate gas metering, always match the OEM drill size.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate — technician recommended (20–30 min).\u003c\/strong\u003e Shut off gas and power, remove the manifold, unthread the old orifice, and thread in the replacement (do not overtighten brass). Because incorrect orifice sizing affects combustion safety, a licensed HVAC technician should confirm firing rate and flame quality.\u003c\/p\u003e\u003cp\u003eConfirm this is a natural gas application before ordering. Questions? info@nationalhvacparts.com.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058037965171,"sku":"GOODMAN-9597","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-burner-orifice-43-for-dms80704bna-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}