{"product_id":"intake-manifold-gasket-set-vortec-gmt400","title":"Intake Manifold Gasket Set - Lower - GMT400","description":"\u003cp\u003eLower intake manifold gasket set for the 1996 to 1998 Chevrolet and GMC C\/K (GMT400) with the Vortec 5.0L (L30) or 5.7L (L31) V8.\u003c\/p\u003e\u003ch3\u003ePart numbers\u003c\/h3\u003e\u003cp\u003eGM 89017465 (formerly 12531704), Chevrolet Performance. Revised-material version addressing the original factory design's coolant leak issue.\u003c\/p\u003e\u003ch3\u003eFits\u003c\/h3\u003e\u003cp\u003e1996 to 1998 Vortec only. The earlier TBI engines use a different gasket set, so check your engine code before ordering. This is the lower gasket only, the upper intake plenum uses a separate seal kit, listed separately.\u003c\/p\u003e\u003ch3\u003eWhy it matters\u003c\/h3\u003e\u003cp\u003eCoolant seepage at the lower intake gasket is a well known, well documented weak point on Vortec small blocks, caused by the original plastic gasket material breaking down under heat cycling. The leak often shows up first as a sweet smell or slow coolant loss before anything more obvious. Constant AC use and high under-hood temperatures here don't help.\u003c\/p\u003e\u003ch3\u003eWhat you get\u003c\/h3\u003e\u003cp\u003eOne lower intake manifold gasket set. Brand Chevrolet Performance.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNot sure it's right for your truck? Send us your VIN and we'll confirm before you order.\u003c\/em\u003e\u003c\/p\u003e","brand":"Chevrolet Performance","offers":[{"title":"Default Title","offer_id":49756208496890,"sku":"OBSAE-GMT4-00003","price":279.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/5131\/8266\/files\/Screenshot2026-07-27120251.png?v=1785139431","url":"https:\/\/obscureparts.com\/products\/intake-manifold-gasket-set-vortec-gmt400","provider":"Obscure Parts","version":"1.0","type":"link"}