{"product_id":"walker-21521-exhaust-muffler","title":"Walker 21521 Exhaust Muffler","description":"\u003ch2\u003eWalker Quiet-Flow SS Muffler for Ford F-150\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow SS muffler Part Number 21521 is a specific-fit exhaust muffler built with 100% stainless-steel construction for corrosion resistance and long-term service. It is engineered for a precise fit, OE-style sound, and steady exhaust flow on select Ford F-150 and Ford F-150 Heritage applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit exhaust muffler for select 2001-2004 Ford F-150 and Ford F-150 Heritage models\u003c\/li\u003e\n\u003cli\u003e100% stainless-steel body construction for durability\u003c\/li\u003e\n\u003cli\u003eOval muffler shape with a 34-inch overall length\u003c\/li\u003e\n\u003cli\u003e2.5-inch inlet and 2.5-inch outlet with offset configuration\u003c\/li\u003e\n\u003cli\u003eCombination muffler design for balanced exhaust performance and sound control\u003c\/li\u003e\n\u003cli\u003eWalker Quiet-Flow SS product line focuses on precision fit and OE-style sound\u003c\/li\u003e\n\u003cli\u003ePart Number 21521 for easy identification during replacement lookup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eThis Walker Quiet-Flow SS muffler is designed for drivers replacing a worn or noisy exhaust component on a Ford F-150 or Ford F-150 Heritage. The stainless-steel body, oval profile, and offset pipe connections support a direct replacement approach for the listed applications, while the Quiet-Flow SS line is built around controlled exhaust tone and consistent flow. This part cross-references Ford OE number 1L3Z5230DA for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Replacement Reasons\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust noise from a rusted or damaged muffler\u003c\/li\u003e\n\u003cli\u003eReduced exhaust flow caused by internal deterioration\u003c\/li\u003e\n\u003cli\u003eFitment issues when replacing a factory-style muffler on a Ford F-150 Heritage\u003c\/li\u003e\n\u003cli\u003eNeed for a stainless-steel replacement on 2001-2004 Ford F-150 applications\u003c\/li\u003e\n\u003cli\u003eRestoring OE-style exhaust sound after muffler failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eFits 2001-2003 Ford F-150, N\/A. Fits 2004 Ford F-150 Heritage, N\/A. Review the vehicle notes before ordering: some applications exclude Super Crew, and some are listed as Premium. Verify inlet and outlet orientation, offset dimensions, and overall muffler length against the existing exhaust layout before installation. If the original system uses welded assemblies, replace all required related parts as specified by the vehicle notes.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow SS mufflers are positioned as precision-fit replacement parts with stainless-steel construction and OE-style sound characteristics. Part Number 21521 is part of Walker’s Quiet-Flow SS line for domestic and import vehicle coverage.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52071751319733,"sku":"BDCN-21521","price":139.28,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WK_21521_Fro.jpg?v=1775142004","url":"https:\/\/www.partcatalog.com\/products\/walker-21521-exhaust-muffler","provider":"PartCatalog","version":"1.0","type":"link"}