{"product_id":"oem-goodman-43-burner-orifice-for-gmt070-4b-b4089343","title":"OEM Goodman #43 Burner Orifice for GMT070-4B — B4089343","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 Burner Orifice\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003e#43 drill-size\u003c\/strong\u003e gas spud for \u003cstrong\u003eGMT070-4B\u003c\/strong\u003e furnaces and compatible Goodman\/Amana models. The orifice is the precision-machined metering jet that threads into the manifold and sets the exact gas flow into each in-shot burner. Bore size is critical: the #43 orifice is calibrated to deliver the correct BTU input for this furnace's rating on natural gas. A damaged, corroded, or wrong-size orifice causes under- or over-firing, sooting, and poor efficiency.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e B4089343\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrifice size:\u003c\/strong\u003e #43 (drill number)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Gas metering jet \/ burner spud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas type:\u003c\/strong\u003e Natural gas (verify against your rating plate)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMT070-4B and compatible furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Genuine OEM Goodman replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e Orifice sizing is not interchangeable — a bore even one drill number off changes the firing rate and combustion quality. The OEM B4089343 guarantees the correct #43 bore and thread pitch for your manifold. We do not recommend generic or re-drilled orifices for gas metering. Always confirm the required size on your furnace's rating plate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstall difficulty:\u003c\/strong\u003e Easy (2\/5). Shut off gas supply, unthread the old orifice from the manifold with the proper deep socket, and hand-thread the new spud in snugly — do not overtighten. Leak-check all connections with soap solution before firing. Gas work should be performed by a qualified technician where code requires.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058158322035,"sku":"GOODMAN-12344","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmt070-4b-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}