{"product_id":"oem-goodman-43-burner-orifice-for-gmt090-5b-furnace-b4089343","title":"OEM Goodman #43 Burner Orifice for GMT090-5B Furnace — B4089343","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB4089343 #43 Burner Orifice\u003c\/strong\u003e (gas spud) is a genuine OEM replacement for the Goodman \u003cstrong\u003eGMT090-5B\u003c\/strong\u003e gas furnace. The orifice is the precision-drilled brass jet threaded into the manifold that meters the exact gas flow into each in-shot burner. The \u003cstrong\u003e#43 drill-size\u003c\/strong\u003e bore sets the correct BTU input for this furnace on natural gas — even a slightly wrong orifice throws off firing rate and flame quality.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Manifold burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003eOrifice size: #43 drill size\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas (verify against furnace rating plate)\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMT090-5B and compatible Goodman\/Amana furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM B4089343\u003c\/strong\u003e is bored and deburred to Goodman's tolerance so the gas stream entrains the correct primary air for a clean flame at rated input. Generic spuds may have inconsistent bore diameters or thread pitch, causing over\/under-firing, sooting, or leaks. Since the orifice directly controls combustion input, always match the size on the rating plate and use OEM.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5)\u003c\/strong\u003e — Shut off gas and power. Remove the burner assembly, back the old orifice out of the manifold with the correct wrench, thread in the matching #43 spud snugly (do not overtighten brass), and leak-test with soap solution after restart. About 15–20 minutes. If unsure about gas work, use a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058160484723,"sku":"GOODMAN-12418","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmt090-5b-furnace-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}