{"product_id":"walker-21421-exhaust-muffler-front","title":"Walker 21421 Exhaust Muffler - Front","description":"\u003ch2\u003eWalker Quiet-Flow SS Muffler for Trailblazer EXT, Envoy XL\u003c\/h2\u003e\u003cp\u003eWalker Quiet-Flow SS muffler Part Number 21421 is a specific-fit exhaust muffler built with stainless-steel body construction and an OE-style sound profile. It is engineered for select Chevrolet Trailblazer EXT, GMC Envoy XL, GMC Envoy XUV, and Isuzu Ascender applications, including front-position and welded-assembly configurations.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e100% stainless-steel body construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eSpecific-fit design for direct application matching\u003c\/li\u003e\n\u003cli\u003eOval muffler shape with combination muffler design\u003c\/li\u003e\n\u003cli\u003e2.5-inch inlet and 2.5-inch outlet inside diameter\u003c\/li\u003e\n\u003cli\u003e2-bolt welded flange inlet with pipe-connection outlet\u003c\/li\u003e\n\u003cli\u003eCenter inlet and offset outlet configuration\u003c\/li\u003e\n\u003cli\u003eWalker Quiet-Flow SS product line for OE-style exhaust sound\u003c\/li\u003e\n\u003cli\u003ePart Number 21421 for application lookup and ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eThe Walker Quiet-Flow SS line focuses on stainless-steel construction, precise fitment, and controlled exhaust tone. This muffler uses an oval body measuring 27 inches long, 11 inches wide, and 5.5 inches high, with an overall length of 44.38 inches. The aluminized finish and stainless-steel body material support long-term exhaust service in demanding underbody conditions. For buyers searching for a Chevrolet Trailblazer EXT muffler, GMC Envoy XL exhaust muffler, or Isuzu Ascender replacement muffler, Part Number 21421 provides a direct-fit solution matched to the listed vehicle configurations.\u003c\/p\u003e\u003cp\u003eThis part cross-references Gates 2405 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExhaust noise from a worn or damaged muffler\u003c\/li\u003e\n\u003cli\u003eRust-related muffler deterioration\u003c\/li\u003e\n\u003cli\u003eRestricted exhaust flow caused by internal failure\u003c\/li\u003e\n\u003cli\u003eFitment issues when replacing a welded-assembly muffler\u003c\/li\u003e\n\u003cli\u003eNeed for an OE-style exhaust sound on listed vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompatible With 2003-2005 Chevrolet Trailblazer EXT, Front; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003cli\u003eCompatible With 2002-2005 Chevrolet Trailblazer EXT, N\/A; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003cli\u003eCompatible With 2002-2005 GMC Envoy XL, N\/A; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003cli\u003eCompatible With 2003-2005 GMC Envoy XL, Front; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003cli\u003eCompatible With 2004-2005 GMC Envoy XUV, N\/A; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003cli\u003eCompatible With 2004-2005 GMC Envoy XUV, Front; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003cli\u003eCompatible With 2003-2005 Isuzu Ascender, N\/A; Premium; Extended Wheelbase; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eVerify inlet and outlet orientation before installation, since this muffler is not reversible and is not tunable. The welded flange inlet and pipe-connection outlet should be matched to the existing exhaust layout on the vehicle.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker positions Quiet-Flow SS mufflers as stainless-steel replacement components with precision fit and controlled exhaust sound. Part Number 21421 is listed with limited lifetime warranty coverage in the fitment notes for the applicable vehicles.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52406894919861,"sku":"BDCN-21421","price":142.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WK_21421_Fro.jpg?v=1777775915","url":"https:\/\/www.partcatalog.com\/products\/walker-21421-exhaust-muffler-front","provider":"PartCatalog","version":"1.0","type":"link"}