{"product_id":"dorman-674-540-exhaust-manifold","title":"Dorman 674-540 Exhaust Manifold - Front","description":"\u003ch2\u003eDorman 674-540 Exhaust Manifold\u003c\/h2\u003e\u003cp\u003eThis Dorman exhaust manifold is engineered to match the fit and function of the original front manifold on specified vehicles. Built from cast iron with a natural finish, it includes the gaskets and downpipe hardware needed for a complete exhaust repair on applications such as Buick LeSabre, Pontiac Bonneville, and Chevrolet Impala.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCast iron construction for durable exhaust service\u003c\/li\u003e\n\u003cli\u003eNatural finish\u003c\/li\u003e\n\u003cli\u003eRound port shape\u003c\/li\u003e\n\u003cli\u003eIncludes gasket and mounting hardware\u003c\/li\u003e\n\u003cli\u003eDirect replacement for the front exhaust manifold on listed vehicles\u003c\/li\u003e\n\u003cli\u003ePart number: 674-540\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDorman 674-540 is a replacement exhaust manifold designed for front-position applications across a wide range of GM sedans and coupes. It is built to match the original manifold’s fit and function, helping restore proper exhaust routing on vehicles including the Buick LeSabre, Buick Park Avenue, Pontiac Bonneville, and Chevrolet Impala. The cast iron body supports long-term exhaust service, while the included gasket and downpipe hardware help complete the repair with the correct service parts.\u003c\/p\u003e\u003cp\u003eThis part cross-references ATP 101273 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Fix\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust leaks at the manifold flange\u003c\/li\u003e\n\u003cli\u003eCracked or warped original manifold housing\u003c\/li\u003e\n\u003cli\u003eBroken or missing manifold mounting points\u003c\/li\u003e\n\u003cli\u003eNoise from a leaking front exhaust manifold\u003c\/li\u003e\n\u003cli\u003eFailed sealing surfaces at the cylinder head or downpipe connection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstall on the front exhaust manifold position only for the listed applications. Verify port shape, gasket alignment, and mounting points before tightening fasteners. Inspect the mating surfaces, studs, and nuts during service to help ensure a proper seal. This part includes the manifold gasket and downpipe hardware listed in the package contents.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman manufactures this manifold to match original fit and function on specified vehicles. Part number 674-540 is built as a regular-grade replacement for front-position exhaust manifold service on compatible Buick, Pontiac, Chevrolet, and Oldsmobile applications.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44045710459061,"sku":"BKKY-674-540","price":102.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_674540_Fro.jpg?v=1775010102","url":"https:\/\/www.partcatalog.com\/products\/dorman-674-540-exhaust-manifold","provider":"PartCatalog","version":"1.0","type":"link"}