{"product_id":"walker-exhaust-muffler-21400","title":"WALKER - Exhaust Muffler - 21400","description":"\u003ch2 data-start=\"474\" data-end=\"500\"\u003e\u003cstrong data-start=\"477\" data-end=\"500\"\u003eProduct Description\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"502\" data-end=\"914\"\u003eThe WALKER® Quiet-Flow® SS \u003cstrong data-start=\"529\" data-end=\"538\"\u003e21400\u003c\/strong\u003e muffler provides an OE-style sound profile, industry-leading corrosion resistance, and precise fitment for full-size Chevrolet and GMC truck platforms. As the only broad-market muffler line that uses \u003cstrong data-start=\"739\" data-end=\"776\"\u003e100% stainless-steel construction\u003c\/strong\u003e, it delivers a significantly longer lifespan than traditional aluminized mufflers, especially in high-moisture or corrosive environments.\u003c\/p\u003e\n\u003cp data-start=\"916\" data-end=\"1164\"\u003eThis unit features OE-style domed heads, louvered tubes, and mechanically joined internals to maintain proper acoustic tuning and reduce radiated noise. Walker’s direct-fit engineering ensures quick, bolt-on installation without cutting or welding.\u003c\/p\u003e\n\u003chr data-start=\"1166\" data-end=\"1169\"\u003e\n\u003ch2 data-start=\"1171\" data-end=\"1190\"\u003e\u003cstrong data-start=\"1174\" data-end=\"1190\"\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1192\" data-end=\"1580\"\u003e\n\u003cli data-start=\"1192\" data-end=\"1267\"\u003e\n\u003cp data-start=\"1194\" data-end=\"1267\"\u003e\u003cstrong data-start=\"1194\" data-end=\"1231\"\u003e100% Stainless-Steel Construction\u003c\/strong\u003e for superior corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1268\" data-end=\"1337\"\u003e\n\u003cp data-start=\"1270\" data-end=\"1337\"\u003e\u003cstrong data-start=\"1270\" data-end=\"1290\"\u003eOE-Style Fitment\u003c\/strong\u003e with model-specific hangers and pipe routing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1338\" data-end=\"1400\"\u003e\n\u003cp data-start=\"1340\" data-end=\"1400\"\u003e\u003cstrong data-start=\"1340\" data-end=\"1363\"\u003eFactory-Style Sound\u003c\/strong\u003e using louvered tubes \u0026amp; domed heads\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1401\" data-end=\"1462\"\u003e\n\u003cp data-start=\"1403\" data-end=\"1462\"\u003e\u003cstrong data-start=\"1403\" data-end=\"1432\"\u003eDurable Mechanical Joints\u003c\/strong\u003e withstand thermal expansion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1463\" data-end=\"1529\"\u003e\n\u003cp data-start=\"1465\" data-end=\"1529\"\u003e\u003cstrong data-start=\"1465\" data-end=\"1491\"\u003eAcoustic \u0026amp; Flow Tested\u003c\/strong\u003e for dependable OE-level performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1530\" data-end=\"1580\"\u003e\n\u003cp data-start=\"1532\" data-end=\"1580\"\u003eBacked by \u003cstrong data-start=\"1542\" data-end=\"1578\"\u003eWalker Limited Lifetime Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1582\" data-end=\"1585\"\u003e\n\u003ch2 data-start=\"1587\" data-end=\"1618\"\u003e\u003cstrong data-start=\"1590\" data-end=\"1618\"\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=\"1620\" data-end=\"2300\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1620\" data-end=\"1646\"\u003e\n\u003ctr data-start=\"1620\" data-end=\"1646\"\u003e\n\u003cth data-start=\"1620\" data-end=\"1636\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"1636\" data-end=\"1646\" data-col-size=\"sm\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1673\" data-end=\"2300\"\u003e\n\u003ctr data-start=\"1673\" data-end=\"1693\"\u003e\n\u003ctd data-start=\"1673\" data-end=\"1685\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1675\" data-end=\"1684\"\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1685\" data-end=\"1693\"\u003eOval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1694\" data-end=\"1718\"\u003e\n\u003ctd data-start=\"1694\" data-end=\"1707\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1696\" data-end=\"1706\"\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1707\" data-end=\"1718\"\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1719\" data-end=\"1755\"\u003e\n\u003ctd data-start=\"1719\" data-end=\"1736\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1721\" data-end=\"1735\"\u003eInlet Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1736\" data-end=\"1755\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1756\" data-end=\"1793\"\u003e\n\u003ctd data-start=\"1756\" data-end=\"1774\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1758\" data-end=\"1773\"\u003eOutlet Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1774\" data-end=\"1793\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1794\" data-end=\"1834\"\u003e\n\u003ctd data-start=\"1794\" data-end=\"1822\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1796\" data-end=\"1821\"\u003eInlet Inside Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1822\" data-end=\"1834\"\u003e2.500 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1835\" data-end=\"1876\"\u003e\n\u003ctd data-start=\"1835\" data-end=\"1864\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1837\" data-end=\"1863\"\u003eOutlet Inside Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1864\" data-end=\"1876\"\u003e2.750 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1877\" data-end=\"1907\"\u003e\n\u003ctd data-start=\"1877\" data-end=\"1895\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1879\" data-end=\"1894\"\u003eBody Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1895\" data-end=\"1907\"\u003e7.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1908\" data-end=\"1939\"\u003e\n\u003ctd data-start=\"1908\" data-end=\"1926\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1910\" data-end=\"1925\"\u003eBody Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1926\" data-end=\"1939\"\u003e25.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1940\" data-end=\"1969\"\u003e\n\u003ctd data-start=\"1940\" data-end=\"1957\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1942\" data-end=\"1956\"\u003eBody Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1957\" data-end=\"1969\"\u003e9.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1970\" data-end=\"2004\"\u003e\n\u003ctd data-start=\"1970\" data-end=\"1991\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1972\" data-end=\"1990\"\u003eOverall Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1991\" data-end=\"2004\"\u003e39.500 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2005\" data-end=\"2034\"\u003e\n\u003ctd data-start=\"2005\" data-end=\"2027\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2007\" data-end=\"2026\"\u003eHanger Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2027\" data-end=\"2034\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2035\" data-end=\"2066\"\u003e\n\u003ctd data-start=\"2035\" data-end=\"2056\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2037\" data-end=\"2055\"\u003eInlet Location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2056\" data-end=\"2066\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2067\" data-end=\"2099\"\u003e\n\u003ctd data-start=\"2067\" data-end=\"2089\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2069\" data-end=\"2088\"\u003eOutlet Location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2089\" data-end=\"2099\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2100\" data-end=\"2126\"\u003e\n\u003ctd data-start=\"2100\" data-end=\"2121\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2102\" data-end=\"2120\"\u003eInlet Quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2121\" data-end=\"2126\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2127\" data-end=\"2154\"\u003e\n\u003ctd data-start=\"2127\" data-end=\"2149\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2129\" data-end=\"2148\"\u003eOutlet Quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2149\" data-end=\"2154\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2155\" data-end=\"2194\"\u003e\n\u003ctd data-start=\"2155\" data-end=\"2175\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2157\" data-end=\"2174\"\u003eBody Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2175\" data-end=\"2194\"\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2195\" data-end=\"2239\"\u003e\n\u003ctd data-start=\"2195\" data-end=\"2227\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2197\" data-end=\"2226\"\u003eUniversal or Specific Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2227\" data-end=\"2239\"\u003eSpecific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2240\" data-end=\"2268\"\u003e\n\u003ctd data-start=\"2240\" data-end=\"2257\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2242\" data-end=\"2256\"\u003eGrade Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2257\" data-end=\"2268\"\u003ePremium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2269\" data-end=\"2300\"\u003e\n\u003ctd data-start=\"2269\" data-end=\"2288\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2271\" data-end=\"2287\"\u003eInlet Offset\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2288\" data-end=\"2300\"\u003e1.750 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=\"2302\" data-end=\"2305\"\u003e\n\u003ch2 data-start=\"2307\" data-end=\"2335\"\u003e\u003cstrong data-start=\"2310\" data-end=\"2335\"\u003eVehicle Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"2337\" data-end=\"2369\"\u003e\u003cstrong data-start=\"2341\" data-end=\"2367\"\u003eFord F-150 (2015–2020)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2370\" data-end=\"2418\"\u003e\n\u003cli data-start=\"2370\" data-end=\"2390\"\u003e\n\u003cp data-start=\"2372\" data-end=\"2390\"\u003e2.7L V6 (164cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2391\" data-end=\"2418\"\u003e\n\u003cp data-start=\"2393\" data-end=\"2418\"\u003e3.5L V6 (3496cc \/ 213cid)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2420\" data-end=\"2423\"\u003e\n\u003ch2 data-start=\"2425\" data-end=\"2452\"\u003e\u003cstrong data-start=\"2428\" data-end=\"2452\"\u003eInstallation \u0026amp; Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2454\" data-end=\"2949\"\u003e\n\u003cli data-start=\"2454\" data-end=\"2534\"\u003e\n\u003cp data-start=\"2456\" data-end=\"2534\"\u003e\u003cstrong data-start=\"2456\" data-end=\"2486\"\u003eDirect-fit bolt-on design:\u003c\/strong\u003e No cutting, welding, or fabrication required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2535\" data-end=\"2611\"\u003e\n\u003cp data-start=\"2537\" data-end=\"2611\"\u003e\u003cstrong data-start=\"2537\" data-end=\"2569\"\u003eUses OE-style hanger points:\u003c\/strong\u003e Ensures proper alignment and clearance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2612\" data-end=\"2723\"\u003e\n\u003cp data-start=\"2614\" data-end=\"2723\"\u003e\u003cstrong data-start=\"2614\" data-end=\"2639\"\u003eStainless steel body:\u003c\/strong\u003e Provides extended service life, especially in high-salt or high-moisture regions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2724\" data-end=\"2793\"\u003e\n\u003cp data-start=\"2726\" data-end=\"2793\"\u003e\u003cstrong data-start=\"2726\" data-end=\"2745\"\u003eNot reversible:\u003c\/strong\u003e Must be installed in the correct orientation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2794\" data-end=\"2869\"\u003e\n\u003cp data-start=\"2796\" data-end=\"2869\"\u003e\u003cstrong data-start=\"2796\" data-end=\"2827\"\u003eInspect gaskets \u0026amp; hardware:\u003c\/strong\u003e Replace as necessary for a proper seal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2870\" data-end=\"2949\"\u003e\n\u003cp data-start=\"2872\" data-end=\"2949\"\u003e\u003cstrong data-start=\"2872\" data-end=\"2913\"\u003eProfessional installation recommended\u003c\/strong\u003e for best fitment and performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALKER","offers":[{"title":"Default Title","offer_id":45880953143495,"sku":"WAL21400","price":151.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2025-11-24161729-Copy.png?v=1764029907","url":"https:\/\/mainstreeteshop.com\/products\/walker-exhaust-muffler-21400","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}