{"product_id":"walker-exhaust-muffler-21577","title":"WALKER - Exhaust Muffler - 21577","description":"\u003ch2 data-start=\"356\" data-end=\"382\"\u003e\u003cstrong data-start=\"359\" data-end=\"382\"\u003eProduct Description\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"384\" data-end=\"795\"\u003eThe Walker® Quiet-Flow® SS \u003cstrong data-start=\"411\" data-end=\"420\"\u003e21577\u003c\/strong\u003e exhaust muffler is engineered with \u003cstrong data-start=\"456\" data-end=\"493\"\u003e100% stainless-steel construction\u003c\/strong\u003e, offering superior corrosion resistance and durability compared to aluminized alternatives. This direct-fit replacement provides OE-style pipe routing, hangers, and brackets for simple installation, while its louvered tube design and domed heads reduce radiated noise for premium, factory-style sound.\u003c\/p\u003e\n\u003cp data-start=\"797\" data-end=\"1004\"\u003eDesigned to last, this muffler features spun-locked heads and mechanically joined tubes to withstand thermal expansion and contraction, ensuring long service life for GM full-size truck and SUV applications.\u003c\/p\u003e\n\u003chr data-start=\"1006\" data-end=\"1009\"\u003e\n\u003ch2 data-start=\"1011\" data-end=\"1030\"\u003e\u003cstrong data-start=\"1014\" data-end=\"1030\"\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1032\" data-end=\"1421\"\u003e\n\u003cli data-start=\"1032\" data-end=\"1106\"\u003e\n\u003cp data-start=\"1034\" data-end=\"1106\"\u003e\u003cstrong data-start=\"1034\" data-end=\"1071\"\u003e100% Stainless-Steel Construction\u003c\/strong\u003e for maximum corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1107\" data-end=\"1179\"\u003e\n\u003cp data-start=\"1109\" data-end=\"1179\"\u003e\u003cstrong data-start=\"1109\" data-end=\"1130\"\u003eOE-Style Fitment:\u003c\/strong\u003e Direct-fit bolt-on design, no welding required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1180\" data-end=\"1248\"\u003e\n\u003cp data-start=\"1182\" data-end=\"1248\"\u003e\u003cstrong data-start=\"1182\" data-end=\"1211\"\u003ePremium Acoustic Control:\u003c\/strong\u003e Louvered tubes reduce noise levels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1249\" data-end=\"1308\"\u003e\n\u003cp data-start=\"1251\" data-end=\"1308\"\u003e\u003cstrong data-start=\"1251\" data-end=\"1269\"\u003eDurable Build:\u003c\/strong\u003e Spun-locked heads resist deformation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1309\" data-end=\"1368\"\u003e\n\u003cp data-start=\"1311\" data-end=\"1368\"\u003e\u003cstrong data-start=\"1311\" data-end=\"1337\"\u003eValidated Performance:\u003c\/strong\u003e Flow-tested and sound-tested\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1369\" data-end=\"1421\"\u003e\n\u003cp data-start=\"1371\" data-end=\"1421\"\u003e\u003cstrong data-start=\"1371\" data-end=\"1419\"\u003eBacked by Walker’s Limited Lifetime Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1423\" data-end=\"1426\"\u003e\n\u003ch2 data-start=\"1428\" data-end=\"1459\"\u003e\u003cstrong data-start=\"1431\" data-end=\"1459\"\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\n\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"1461\" data-end=\"2168\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1461\" data-end=\"1487\"\u003e\n\u003ctr data-start=\"1461\" data-end=\"1487\"\u003e\n\u003cth data-start=\"1461\" data-end=\"1477\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"1477\" data-end=\"1487\" data-col-size=\"sm\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1514\" data-end=\"2168\"\u003e\n\u003ctr data-start=\"1514\" data-end=\"1534\"\u003e\n\u003ctd data-start=\"1514\" data-end=\"1526\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1516\" data-end=\"1525\"\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1526\" data-end=\"1534\"\u003eOval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1535\" data-end=\"1562\"\u003e\n\u003ctd data-start=\"1535\" data-end=\"1548\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1537\" data-end=\"1547\"\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1548\" data-end=\"1562\"\u003eAluminized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1563\" data-end=\"1599\"\u003e\n\u003ctd data-start=\"1563\" data-end=\"1580\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1565\" data-end=\"1579\"\u003eInlet Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1580\" data-end=\"1599\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1600\" data-end=\"1637\"\u003e\n\u003ctd data-start=\"1600\" data-end=\"1618\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1602\" data-end=\"1617\"\u003eOutlet Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1618\" data-end=\"1637\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1638\" data-end=\"1678\"\u003e\n\u003ctd data-start=\"1638\" data-end=\"1666\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1640\" data-end=\"1665\"\u003eInlet Inside Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1666\" data-end=\"1678\"\u003e3.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1679\" data-end=\"1709\"\u003e\n\u003ctd data-start=\"1679\" data-end=\"1697\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1681\" data-end=\"1696\"\u003eBody Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1697\" data-end=\"1709\"\u003e7.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1710\" data-end=\"1741\"\u003e\n\u003ctd data-start=\"1710\" data-end=\"1728\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1712\" data-end=\"1727\"\u003eBody Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1728\" data-end=\"1741\"\u003e24.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1742\" data-end=\"1771\"\u003e\n\u003ctd data-start=\"1742\" data-end=\"1759\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1744\" data-end=\"1758\"\u003eBody Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1759\" data-end=\"1771\"\u003e9.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1772\" data-end=\"1806\"\u003e\n\u003ctd data-start=\"1772\" data-end=\"1793\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1774\" data-end=\"1792\"\u003eOverall Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1793\" data-end=\"1806\"\u003e29.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1807\" data-end=\"1838\"\u003e\n\u003ctd data-start=\"1807\" data-end=\"1828\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1809\" data-end=\"1827\"\u003eInlet Location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1828\" data-end=\"1838\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1839\" data-end=\"1871\"\u003e\n\u003ctd data-start=\"1839\" data-end=\"1861\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1841\" data-end=\"1860\"\u003eOutlet Location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1861\" data-end=\"1871\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1872\" data-end=\"1898\"\u003e\n\u003ctd data-start=\"1872\" data-end=\"1893\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1874\" data-end=\"1892\"\u003eInlet Quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1893\" data-end=\"1898\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1899\" data-end=\"1926\"\u003e\n\u003ctd data-start=\"1899\" data-end=\"1921\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1901\" data-end=\"1920\"\u003eOutlet Quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1921\" data-end=\"1926\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1927\" data-end=\"1966\"\u003e\n\u003ctd data-start=\"1927\" data-end=\"1947\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1929\" data-end=\"1946\"\u003eBody Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"1947\" data-end=\"1966\" data-col-size=\"sm\"\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1967\" data-end=\"1995\"\u003e\n\u003ctd data-start=\"1967\" data-end=\"1989\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1969\" data-end=\"1988\"\u003eHanger Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1989\" data-end=\"1995\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1996\" data-end=\"2019\"\u003e\n\u003ctd data-start=\"1996\" data-end=\"2013\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1998\" data-end=\"2012\"\u003eReversible\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2013\" data-end=\"2019\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2020\" data-end=\"2064\"\u003e\n\u003ctd data-start=\"2020\" data-end=\"2052\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2022\" data-end=\"2051\"\u003eUniversal or Specific Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2052\" data-end=\"2064\"\u003eSpecific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2065\" data-end=\"2093\"\u003e\n\u003ctd data-start=\"2065\" data-end=\"2082\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2067\" data-end=\"2081\"\u003eGrade Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2082\" data-end=\"2093\"\u003ePremium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2094\" data-end=\"2125\"\u003e\n\u003ctd data-start=\"2094\" data-end=\"2113\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2096\" data-end=\"2112\"\u003eInlet Offset\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2113\" data-end=\"2125\"\u003e1.625 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2126\" data-end=\"2168\"\u003e\n\u003ctd data-start=\"2126\" data-end=\"2156\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2128\" data-end=\"2155\"\u003eOutlet Outside Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2156\" data-end=\"2168\"\u003e2.750 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"2170\" data-end=\"2173\"\u003e\n\u003ch2 data-start=\"2175\" data-end=\"2203\"\u003e\u003cstrong data-start=\"2178\" data-end=\"2203\"\u003eVehicle Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"2205\" data-end=\"2222\"\u003e\u003cstrong data-start=\"2209\" data-end=\"2222\"\u003eChevrolet\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2223\" data-end=\"2460\"\u003e\n\u003cli data-start=\"2223\" data-end=\"2269\"\u003e\n\u003cp data-start=\"2225\" data-end=\"2247\"\u003e\u003cstrong data-start=\"2225\" data-end=\"2245\"\u003eAvalanche (2007)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2250\" data-end=\"2269\"\u003e\n\u003cli data-start=\"2250\" data-end=\"2269\"\u003e\n\u003cp data-start=\"2252\" data-end=\"2269\"\u003e6.0L V8 (364 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2270\" data-end=\"2409\"\u003e\n\u003cp data-start=\"2272\" data-end=\"2304\"\u003e\u003cstrong data-start=\"2272\" data-end=\"2302\"\u003eSilverado 1500 (2007–2013)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2307\" data-end=\"2409\"\u003e\n\u003cli data-start=\"2307\" data-end=\"2328\"\u003e\n\u003cp data-start=\"2309\" data-end=\"2328\"\u003e4.3L V6 (262 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2331\" data-end=\"2352\"\u003e\n\u003cp data-start=\"2333\" data-end=\"2352\"\u003e4.8L V8 (294 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2355\" data-end=\"2376\"\u003e\n\u003cp data-start=\"2357\" data-end=\"2376\"\u003e5.3L V8 (325 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2379\" data-end=\"2409\"\u003e\n\u003cp data-start=\"2381\" data-end=\"2409\"\u003e6.0L V8 (364 cid, 2007–2008)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2410\" data-end=\"2460\"\u003e\n\u003cp data-start=\"2412\" data-end=\"2438\"\u003e\u003cstrong data-start=\"2412\" data-end=\"2436\"\u003eSuburban 1500 (2007)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2441\" data-end=\"2460\"\u003e\n\u003cli data-start=\"2441\" data-end=\"2460\"\u003e\n\u003cp data-start=\"2443\" data-end=\"2460\"\u003e6.0L V8 (364 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2462\" data-end=\"2473\"\u003e\u003cstrong data-start=\"2466\" data-end=\"2473\"\u003eGMC\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2474\" data-end=\"2661\"\u003e\n\u003cli data-start=\"2474\" data-end=\"2610\"\u003e\n\u003cp data-start=\"2476\" data-end=\"2505\"\u003e\u003cstrong data-start=\"2476\" data-end=\"2503\"\u003eSierra 1500 (2007–2013)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2508\" data-end=\"2610\"\u003e\n\u003cli data-start=\"2508\" data-end=\"2529\"\u003e\n\u003cp data-start=\"2510\" data-end=\"2529\"\u003e4.3L V6 (262 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2532\" data-end=\"2553\"\u003e\n\u003cp data-start=\"2534\" data-end=\"2553\"\u003e4.8L V8 (294 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2556\" data-end=\"2577\"\u003e\n\u003cp data-start=\"2558\" data-end=\"2577\"\u003e5.3L V8 (325 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2580\" data-end=\"2610\"\u003e\n\u003cp data-start=\"2582\" data-end=\"2610\"\u003e6.0L V8 (364 cid, 2007–2008)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2611\" data-end=\"2661\"\u003e\n\u003cp data-start=\"2613\" data-end=\"2639\"\u003e\u003cstrong data-start=\"2613\" data-end=\"2637\"\u003eYukon XL 1500 (2007)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2642\" data-end=\"2661\"\u003e\n\u003cli data-start=\"2642\" data-end=\"2661\"\u003e\n\u003cp data-start=\"2644\" data-end=\"2661\"\u003e6.0L V8 (364 cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2663\" data-end=\"2666\"\u003e\n\u003ch2 data-start=\"2668\" data-end=\"2695\"\u003e\u003cstrong data-start=\"2671\" data-end=\"2695\"\u003eInstallation \u0026amp; Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2697\" data-end=\"3197\"\u003e\n\u003cli data-start=\"2697\" data-end=\"2764\"\u003e\n\u003cp data-start=\"2699\" data-end=\"2764\"\u003e\u003cstrong data-start=\"2699\" data-end=\"2729\"\u003eDirect-fit, bolt-on design\u003c\/strong\u003e – no cutting or welding required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2765\" data-end=\"2833\"\u003e\n\u003cp data-start=\"2767\" data-end=\"2833\"\u003e\u003cstrong data-start=\"2767\" data-end=\"2793\"\u003eVerify inlet size (3”)\u003c\/strong\u003e for compatibility with factory piping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2834\" data-end=\"2899\"\u003e\n\u003cp data-start=\"2836\" data-end=\"2899\"\u003e\u003cstrong data-start=\"2836\" data-end=\"2854\"\u003eNot reversible\u003c\/strong\u003e – must be installed in correct orientation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2900\" data-end=\"2972\"\u003e\n\u003cp data-start=\"2902\" data-end=\"2972\"\u003e\u003cstrong data-start=\"2902\" data-end=\"2947\"\u003eReuse or replace existing clamps\/hardware\u003c\/strong\u003e depending on condition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2973\" data-end=\"3041\"\u003e\n\u003cp data-start=\"2975\" data-end=\"3041\"\u003e\u003cstrong data-start=\"2975\" data-end=\"2997\"\u003eNo hanger included\u003c\/strong\u003e – ensure OE hanger is intact and reusable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3042\" data-end=\"3120\"\u003e\n\u003cp data-start=\"3044\" data-end=\"3120\"\u003e\u003cstrong data-start=\"3044\" data-end=\"3085\"\u003eProfessional installation recommended\u003c\/strong\u003e for proper alignment and sealing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3121\" data-end=\"3197\"\u003e\n\u003cp data-start=\"3123\" data-end=\"3197\"\u003e\u003cstrong data-start=\"3123\" data-end=\"3161\"\u003eDesigned for stock exhaust systems\u003c\/strong\u003e; modifications may affect fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALKER","offers":[{"title":"Default Title","offer_id":45882609139911,"sku":"WAL21577","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2025-11-24165741.png?v=1764032199","url":"https:\/\/mainstreeteshop.com\/products\/walker-exhaust-muffler-21577","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}