{"product_id":"dorman-674-990-exhaust-manifold","title":"Dorman 674-990 Exhaust Manifold","description":"\u003ch2\u003eOverview of Dorman Exhaust Manifold 674-990\u003c\/h2\u003e\u003cp\u003eThe Dorman 674-990 exhaust manifold is engineered for reliable performance in select Buick, Chevrolet, GMC, Isuzu, and Saab vehicles. Designed with durable cast iron and including essential mounting hardware, this exhaust manifold supports efficient exhaust flow and engine operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable cast iron for long-lasting strength\u003c\/li\u003e\n\u003cli\u003eNatural color finish with an irregular port shape for precise fitment\u003c\/li\u003e\n\u003cli\u003eIncludes mounting hardware, manifold gasket, flange gasket, and studs for complete installation\u003c\/li\u003e\n\u003cli\u003eEquipped with a heat shield to protect surrounding components\u003c\/li\u003e\n\u003cli\u003eCompatible with Buick, Chevrolet, GMC, Isuzu, and Saab models including 9-7x, Ascender, Envoy, Rainier, Trailblazer, and Trailblazer EXT\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman 674-990 exhaust manifold is crafted from cast iron, providing the necessary durability to withstand high temperatures and exhaust gases. Its irregular port shape is designed to match the specific exhaust ports of compatible vehicles, ensuring a proper seal and optimal exhaust flow. This part comes with all required mounting hardware, including a manifold gasket, flange gasket, and studs, simplifying the installation process. Additionally, the included heat shield helps to reduce heat transfer to nearby engine components, enhancing overall engine bay safety and performance.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis exhaust manifold is compatible with a range of vehicles, including Buick 9-7x, Chevrolet Trailblazer and Trailblazer EXT, GMC Envoy and Rainier, Isuzu Ascender, and Saab 9-7x models. The part number 674-990 ensures precise fitment for these specific makes and models, making it a suitable replacement for worn or damaged exhaust manifolds in these vehicles.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Exhaust Manifold\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust leaks causing reduced engine performance and increased emissions\u003c\/li\u003e\n\u003cli\u003eCracked or warped manifolds leading to exhaust noise and potential engine damage\u003c\/li\u003e\n\u003cli\u003eFailed or missing heat shields resulting in heat damage to surrounding components\u003c\/li\u003e\n\u003cli\u003eCorroded or damaged mounting hardware complicating manifold installation\u003c\/li\u003e\n\u003cli\u003eGasket failures causing exhaust gas leaks and decreased fuel efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the engine is cool before beginning installation to avoid burns\u003c\/li\u003e\n\u003cli\u003eUse the included gaskets and mounting hardware to guarantee a proper seal and fit\u003c\/li\u003e\n\u003cli\u003eTorque all bolts and studs to manufacturer specifications to prevent leaks\u003c\/li\u003e\n\u003cli\u003eInspect the exhaust ports and surrounding components for damage before installation\u003c\/li\u003e\n\u003cli\u003eVerify compatibility with your vehicle’s make and model using the part number 674-990\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this exhaust manifold to meet or exceed OEM standards for fit, form, and function. The cast iron construction and included heat shield contribute to the part’s durability and reliability. This product includes a limited warranty covering defects in material and workmanship, providing confidence in its long-term performance.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44055026598069,"sku":"BKKY-674-990","price":358.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_674990_Fro.jpg?v=1775010184","url":"https:\/\/www.partcatalog.com\/products\/dorman-674-990-exhaust-manifold","provider":"PartCatalog","version":"1.0","type":"link"}