{"product_id":"oem-goodman-43-burner-orifice-for-gmth070-4-b4089343","title":"OEM Goodman #43 Burner Orifice for GMTH070-4 — B4089343","description":"\u003cp\u003eThe genuine Goodman \u003cstrong\u003eB4089343\u003c\/strong\u003e is a #43 burner orifice (gas spud) for \u003cstrong\u003eGMTH070-4\u003c\/strong\u003e and compatible Goodman\/Amana gas furnaces. The orifice threads into the gas manifold and meters the precise volume of gas delivered to each in-shot burner. The #43 drill-size bore sets the correct BTU input for natural gas at the rated manifold pressure — a small part that directly controls firing rate, efficiency, and safe 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\u003eOrifice size: #43 (drill size)\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas (LP conversion uses a different orifice size)\u003c\/li\u003e\n\u003cli\u003eFunction: Meters gas flow into each in-shot burner\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMTH070-4 and compatible furnace platforms\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 exact. The OEM B4089343 is precision-drilled to the #43 bore Goodman specifies for this furnace's input rating and manifold pressure. A generic or mis-sized orifice will over- or under-fire the furnace, causing poor efficiency, sooting, short cycling, or unsafe CO levels. Always match the OEM size and quantity to your burner count.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5)\u003c\/strong\u003e — Turn off gas and power, remove the burner box, unthread the old orifices from the manifold, and install the new B4089343 spuds, sealing per code. Replace as a full set. A licensed technician should verify manifold pressure, input rate, and combustion after installation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eGas fittings must be leak-checked by a qualified professional. Verify fuel type and full model\/serial before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058165891443,"sku":"GOODMAN-12539","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmth070-4-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}