{"product_id":"walker-21522-exhaust-muffler","title":"Walker 21522 Exhaust Muffler","description":"\u003ch2\u003eWalker Quiet-Flow Muffler 21522 Overview\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow 21522 is a specific-fit exhaust muffler built for select Chevrolet Silverado and GMC Sierra heavy-duty applications. It combines an oval stainless steel body with an aluminized finish and a 3-inch offset inlet and outlet for OE-style exhaust routing and sound control.\u003c\/p\u003e\u003cp\u003eWalker Quiet-Flow mufflers are part of the Quiet-Flow product line, which focuses on direct-fit replacement mufflers for domestic and foreign vehicles where factory-like sound and steady exhaust flow matter. Part number 21522 is a fitment-based replacement for 2001-2006 Chevrolet Silverado 2500 HD and 3500, 2001-2006 GMC Sierra 2500 HD and 3500, plus 2007 Chevrolet Silverado 2500 HD Classic, Silverado 3500 Classic, GMC Sierra 2500 HD Classic, and Sierra 3500 Classic.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit exhaust muffler for select Chevrolet Silverado and GMC Sierra trucks\u003c\/li\u003e\n\u003cli\u003eOval muffler body with combination muffler design\u003c\/li\u003e\n\u003cli\u003e3-inch inlet and 3-inch outlet with offset configuration\u003c\/li\u003e\n\u003cli\u003eStainless steel body construction with aluminized finish\u003c\/li\u003e\n\u003cli\u003eOverall length: 27 inches; body length: 20 inches; body width: 11 inches; body height: 5.5 inches\u003c\/li\u003e\n\u003cli\u003eSingle inlet and single outlet pipe connection layout\u003c\/li\u003e\n\u003cli\u003eWalker Quiet-Flow line for OE-style exhaust sound and flow characteristics\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eWalker 21522 is an exhaust muffler engineered for direct replacement on heavy-duty GM trucks, including Chevrolet Silverado 2500 HD and 3500 models and GMC Sierra 2500 HD and 3500 models across the listed years. The 3-inch offset inlet and outlet configuration supports the factory-style exhaust path used on these applications, while the oval body shape and combination muffler design help maintain a controlled exhaust note.\u003c\/p\u003e\u003cp\u003eThis part number is a practical choice for owners searching for a Walker muffler for 2001-2006 Chevrolet Silverado 2500 HD, a Walker muffler for 2001-2006 GMC Sierra 3500, or a Walker Quiet-Flow replacement for 2007 Silverado Classic and Sierra Classic trucks. Part number 21522 is also cross-referenced to Anchor 2548 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat This Muffler Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust noise that has become louder than factory levels\u003c\/li\u003e\n\u003cli\u003eCorrosion-related muffler replacement on aging truck exhaust systems\u003c\/li\u003e\n\u003cli\u003eRestricted exhaust flow caused by a worn or damaged muffler\u003c\/li\u003e\n\u003cli\u003eFitment issues when replacing a factory-style 3-inch offset muffler\u003c\/li\u003e\n\u003cli\u003eNeed for a direct replacement on Silverado and Sierra heavy-duty applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the inlet and outlet diameter, offset configuration, and overall muffler dimensions before installation. This is a specific-fit muffler, so confirm the vehicle year, make, and model against the listed applications for Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500.\u003c\/p\u003e\u003cp\u003eIf the exhaust system uses a welded assembly, replace all required related parts during service to maintain proper alignment and sealing. Professional exhaust installation is recommended when matching factory routing and fitment are important.\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 built to deliver steady exhaust flow with OE-style sound characteristics for the listed GM truck applications.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52071751483573,"sku":"BDCN-21522","price":137.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WK_21522_Fro.jpg?v=1775142004","url":"https:\/\/www.partcatalog.com\/products\/walker-21522-exhaust-muffler","provider":"PartCatalog","version":"1.0","type":"link"}