{"product_id":"walker-18409-exhaust-muffler","title":"Walker 18409 Exhaust Muffler","description":"\u003ch2\u003eWalker SoundFX Direct Fit Muffler Overview\u003c\/h2\u003e\u003cp\u003eWalker SoundFX Direct Fit muffler Part Number 18409 is a specific-fit exhaust muffler built for select Cadillac, Buick, Chevrolet, Oldsmobile, Pontiac, Dodge, and GMC applications. It uses 100% aluminized steel for improved service life versus low-carbon steel and is shaped for a clean OE-style appearance with controlled exhaust acoustics.\u003c\/p\u003e\u003cp\u003eThe SoundFX Direct Fit line focuses on direct replacement fitment and durable construction. For shoppers searching for a replacement muffler for a 1975-1977 Pontiac Grand Prix, 1975-1976 Chevrolet Impala, or 1980-1988 Dodge Ramcharger exhaust system, Walker 18409 provides a direct-fit solution with the correct inlet and outlet configuration.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit exhaust muffler for select classic and late-1970s to 1990 applications\u003c\/li\u003e\n\u003cli\u003eOval combination muffler design with 1 inlet and 1 outlet\u003c\/li\u003e\n\u003cli\u003e2.5 in. inlet inside diameter and 2.25 in. outlet inside diameter\u003c\/li\u003e\n\u003cli\u003eOffset inlet and center outlet configuration\u003c\/li\u003e\n\u003cli\u003e100% aluminized steel body for longer service life than low-carbon steel\u003c\/li\u003e\n\u003cli\u003eMechanical interior joints and spun-locked heads for added durability\u003c\/li\u003e\n\u003cli\u003eAluminized finish for a clean, corrosion-resistant appearance\u003c\/li\u003e\n\u003cli\u003eWalker SoundFX Direct Fit part number 18409\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eWalker SoundFX Direct Fit Part Number 18409 is an oval, regular-grade muffler with a steel body, 24-inch overall length, 21-inch body length, 9.75-inch body width, and 4.25-inch body height. The inlet uses a 2.5-inch pipe connection with an offset configuration and 2.875-inch inlet offset, while the outlet uses a 2.25-inch pipe connection with a center configuration. This layout supports direct replacement on listed vehicles where the original exhaust routing matches these dimensions.\u003c\/p\u003e\u003cp\u003eThis muffler is listed for applications including 1975-1977 Pontiac Grand LeMans and Grand Prix, 1975-1976 Chevrolet Caprice and Impala, 1975-1976 Buick LeSabre and Riviera, and 1989-1990 Cadillac Fleetwood. It also appears in fitment for 1980-1988 Dodge Ramcharger and 1982 Chevrolet G10\/G20\/G30 and GMC G1500\/G2500\/G3500 vans, making Walker 18409 a useful search match for owners needing a direct-fit exhaust muffler for these specific vehicles.\u003c\/p\u003e\u003cp\u003eThis part cross-references TYC 700290 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Problems This Muffler Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRust-through or corrosion in the original muffler body\u003c\/li\u003e\n\u003cli\u003eExhaust noise caused by a damaged internal baffle or chamber\u003c\/li\u003e\n\u003cli\u003ePoor fitment from a previous non-OE-style replacement\u003c\/li\u003e\n\u003cli\u003eExhaust leaks at the muffler connection points\u003c\/li\u003e\n\u003cli\u003eLoss of factory-style exhaust tone on listed Cadillac, Buick, Chevrolet, Oldsmobile, Pontiac, Dodge, and GMC vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Fitment\u003c\/h2\u003e\u003cp\u003eCompatible With the following vehicles and configurations:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFits 1990 Cadillac DeVille, N\/A; if welded assembly, modifications and\/or additional parts may be required.\u003c\/li\u003e\n\u003cli\u003eFits 1989-1990 Cadillac Fleetwood, N\/A; if welded assembly, modifications and\/or additional parts may be required.\u003c\/li\u003e\n\u003cli\u003eFits 1989-1990 Cadillac Fleetwood, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1989 Cadillac DeVille, N\/A; if welded assembly, replace all required parts.\u003c\/li\u003e\n\u003cli\u003eFits 1980-1988 Dodge Ramcharger, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1982 Chevrolet G10, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1982 Chevrolet G20, N\/A; with Single Catalytic Converter.\u003c\/li\u003e\n\u003cli\u003eFits 1982 Chevrolet G30, N\/A; with Single Catalytic Converter.\u003c\/li\u003e\n\u003cli\u003eFits 1982 GMC G1500, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1982 GMC G2500, N\/A; with Single Catalytic Converter.\u003c\/li\u003e\n\u003cli\u003eFits 1982 GMC G3500, N\/A; with Single Catalytic Converter.\u003c\/li\u003e\n\u003cli\u003eFits 1978 Oldsmobile Toronado, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1977 Buick Century, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1977 Oldsmobile Cutlass, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1977 Pontiac Grand LeMans, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1977 Pontiac Grand Prix, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1977 Pontiac LeMans, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Buick LeSabre, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Buick Riviera, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Chevrolet Caprice, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Chevrolet Impala, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Oldsmobile 98, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Oldsmobile Custom Cruiser, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1976 Oldsmobile Cutlass, N\/A; except late models with 2 in. tail pipe.\u003c\/li\u003e\n\u003cli\u003eFits 1976 Oldsmobile Cutlass Salon, N\/A; except late models with 2 in. tail pipe.\u003c\/li\u003e\n\u003cli\u003eFits 1976 Oldsmobile Cutlass Supreme, N\/A; except late models with 2 in. tail pipe.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Oldsmobile Delta 88, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1976 Oldsmobile Delta 88, N\/A; except late models with 2 in. tail pipe.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Pontiac Bonneville, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975-1976 Pontiac Catalina, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1976 Pontiac Grand LeMans, N\/A; except late models with 2 in. tail pipe.\u003c\/li\u003e\n\u003cli\u003eFits 1976 Pontiac LeMans, N\/A; except late models with 2 in. tail pipe.\u003c\/li\u003e\n\u003cli\u003eFits 1975 Buick Century, N\/A; if welded assembly, replace all required parts.\u003c\/li\u003e\n\u003cli\u003eFits 1975 Buick Regal, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975 Chevrolet Bel Air, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975 Oldsmobile Cutlass Salon, N\/A.\u003c\/li\u003e\n\u003cli\u003eFits 1975 Oldsmobile Cutlass Supreme, N\/A.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBecause this is a specific-fit muffler, confirm inlet and outlet sizing, offset, and tailpipe configuration before installation. On welded assemblies, additional exhaust components or modifications may be required to complete the repair.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker SoundFX Direct Fit mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability and consistent exhaust performance. The 18409 part number is engineered as a direct-fit replacement for the listed applications, including classic Pontiac Grand Prix and Chevrolet Impala exhaust service.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52406894723253,"sku":"BDCN-18409","price":54.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WK_18409_Fro.jpg?v=1777775882","url":"https:\/\/www.partcatalog.com\/products\/walker-18409-exhaust-muffler","provider":"PartCatalog","version":"1.0","type":"link"}