{"product_id":"walker-21753-exhaust-muffler","title":"Walker 21753 Exhaust Muffler","description":"\u003ch2\u003eWalker Quiet-Flow Muffler for HD Trucks\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow muffler Part Number 21753 is a specific-fit exhaust muffler built for select Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications. It is designed for drivers who want OE-style exhaust sound with improved flow in a direct replacement format.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWalker Quiet-Flow line for OE-style sound and balanced exhaust performance\u003c\/li\u003e\n\u003cli\u003eSpecific fit for select 2011-2019 Chevrolet Silverado HD and GMC Sierra HD trucks\u003c\/li\u003e\n\u003cli\u003eRound muffler body with 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 outlet configuration for application-specific exhaust routing\u003c\/li\u003e\n\u003cli\u003eReflection muffler type for controlled exhaust tone\u003c\/li\u003e\n\u003cli\u003ePart Number 21753 for catalog and fitment lookup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow 21753 is a round exhaust muffler with an 11-inch body width, 11-inch body height, and 23-inch body length. Overall length measures 29 inches. The steel body and aluminized finish are selected for everyday exhaust service, while the reflection-style internal design supports a quieter, factory-like sound profile. This muffler is a direct-fit solution for HD truck exhaust repair and replacement work on Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models.\u003c\/p\u003e\u003cp\u003eThe Quiet-Flow product line focuses on replacement mufflers that match OE-style sound characteristics while maintaining practical exhaust flow. For shoppers searching for a Walker muffler for 2011-2017 Chevrolet Silverado 2500 HD or a Walker exhaust muffler for 2018-2019 GMC Sierra 2500 HD, Part Number 21753 is the relevant catalog reference. This part cross-references AP Exhaust 2644 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Muffler Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust noise that is louder than factory levels\u003c\/li\u003e\n\u003cli\u003eCorrosion-related muffler replacement on aluminized steel systems\u003c\/li\u003e\n\u003cli\u003eDamaged or rusted muffler body on HD pickup exhaust\u003c\/li\u003e\n\u003cli\u003eNeed for a direct-fit replacement with OE-style sound\u003c\/li\u003e\n\u003cli\u003eExhaust service on trucks with offset inlet and outlet routing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify inlet and outlet diameter, offset configuration, and overall length before installation. This muffler uses pipe connection ends and is not reversible or tunable. For welded assemblies, replace all required parts as noted in the fitment data. Confirm vehicle-specific exhaust routing on the Silverado HD or Sierra HD before final assembly.\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. Part Number 21753 is built for specific applications and supported by Walker’s Quiet-Flow product line standards.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52071759741109,"sku":"BDCN-21753","price":254.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WK_21753_Fro.jpg?v=1775142022","url":"https:\/\/www.partcatalog.com\/products\/walker-21753-exhaust-muffler","provider":"PartCatalog","version":"1.0","type":"link"}