{"product_id":"walker-21706-exhaust-muffler","title":"Walker 21706 Exhaust Muffler","description":"\u003ch2\u003eWalker Quiet-Flow Muffler for Silverado and Sierra HD\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow muffler Part Number 21706 is a specific-fit exhaust muffler built for select Chevrolet Silverado HD and GMC Sierra HD applications. It is designed for OE-style sound control with improved exhaust flow, making it a direct replacement choice for heavy-duty truck exhaust service.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit exhaust muffler for confirmed vehicle applications\u003c\/li\u003e\n\u003cli\u003eRound muffler body with a steel construction and aluminized finish\u003c\/li\u003e\n\u003cli\u003e3.5-inch inlet and 3.5-inch outlet with pipe connection ends\u003c\/li\u003e\n\u003cli\u003eOffset inlet and offset outlet configuration\u003c\/li\u003e\n\u003cli\u003eReflection muffler design for OE-style sound characteristics\u003c\/li\u003e\n\u003cli\u003eWalker Quiet-Flow line for domestic and foreign vehicle coverage\u003c\/li\u003e\n\u003cli\u003ePart Number 21706 for catalog and fitment lookup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow Part Number 21706 is a round exhaust muffler with an 11-inch body width, 11-inch body height, 25-inch body length, and 31-inch overall length. The aluminized steel body is built for exhaust system replacement work where a direct-fit muffler is needed. This muffler uses a 3.5-inch inlet and outlet, with offset pipe connections that match the listed heavy-duty truck applications.\u003c\/p\u003e\u003cp\u003eCompatible With 2007-2010 Chevrolet Silverado 2500 HD, N\/A; 2007-2010 Chevrolet Silverado 3500 HD, N\/A; 2007-2010 GMC Sierra 2500 HD, N\/A; 2007-2010 GMC Sierra 3500 HD, N\/A; 2007 Chevrolet Silverado 2500 HD Classic, N\/A; and 2007 GMC Sierra 2500 HD Classic, N\/A. Search terms such as Walker 21706 muffler for Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD exhaust replacement align with this fitment.\u003c\/p\u003e\u003cp\u003eWalker Quiet-Flow is the product line for buyers looking for an OE-style exhaust note with application-specific fitment. This part cross-references AP Exhaust 2589 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or rusted factory muffler\u003c\/li\u003e\n\u003cli\u003eRestoring exhaust sound control on HD pickup trucks\u003c\/li\u003e\n\u003cli\u003eAddressing exhaust leaks at the muffler body or connections\u003c\/li\u003e\n\u003cli\u003eCorrecting fitment issues from a damaged or modified muffler\u003c\/li\u003e\n\u003cli\u003eServicing a welded exhaust assembly where the muffler section is being replaced\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the inlet and outlet diameter, offset configuration, and overall length before installation. Because this is a specific-fit muffler, confirm the vehicle application against the listed Silverado HD and Sierra HD models before welding or final assembly. If the exhaust system is a welded assembly, replace all required related parts during service to maintain proper alignment and sealing.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker backs Quiet-Flow mufflers with a limited lifetime warranty and a 90-day Safe and Sound guarantee. The Quiet-Flow line is positioned for OE-style sound and application-specific exhaust replacement on supported Chevrolet Silverado HD and GMC Sierra HD trucks.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52071758201013,"sku":"BDCN-21706","price":258.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WK_21706_Fro.jpg?v=1775142018","url":"https:\/\/www.partcatalog.com\/products\/walker-21706-exhaust-muffler","provider":"PartCatalog","version":"1.0","type":"link"}