{"product_id":"oem-goodman-43-burner-orifice-for-gmth045-3-b4089343","title":"OEM Goodman #43 Burner Orifice for GMTH045-3 — B4089343","description":"\u003ch2\u003eGoodman B4089343 Burner Orifice (#43 Drill Size)\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB4089343\u003c\/strong\u003e is a genuine OEM #43 burner orifice (spud) for \u003cstrong\u003eGoodman GMTH045-3\u003c\/strong\u003e gas furnaces. The orifice threads into the manifold and precisely meters the flow of natural gas into each in-shot burner. The #43 drill size sets the exact gas flow rate the furnace was engineered for, which directly controls BTU input, flame quality, and combustion efficiency.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: B4089343\u003c\/li\u003e\n\u003cli\u003eType: Threaded burner orifice \/ spud\u003c\/li\u003e\n\u003cli\u003eDrill Size: #43\u003c\/li\u003e\n\u003cli\u003eGas Type: Natural gas (verify before install)\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMTH045-3 gas furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOrifice sizing is safety-critical. A genuine Goodman #43 orifice guarantees the bore is machined to spec so the furnace fires at the rated input. An incorrectly sized or poorly drilled generic orifice can cause over-firing, sooting, or a lifted flame. Always match the exact drill number and gas type — OEM removes the guesswork.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5)\u003c\/strong\u003e — Shut off gas and power, unthread the old orifice from the manifold, and thread in the replacement. About 5–10 minutes per orifice. Leak-test the manifold after service. Replace as a set for consistent firing.\u003c\/p\u003e\u003cp\u003eCompatible with Goodman GMTH045-3. Confirm gas type and orifice size before ordering.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058165039475,"sku":"GOODMAN-12507","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmth045-3-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}