{"product_id":"walker-exhaust-muffler-21919","title":"WALKER - Exhaust Muffler - 21919","description":"\u003ch2 data-start=\"323\" data-end=\"345\"\u003eProduct Description\u003c\/h2\u003e\n\u003cp data-start=\"347\" data-end=\"715\"\u003eThe WALKER 21919 Quiet-Flow® SS Exhaust Muffler is a premium, OE-style stainless-steel replacement designed for 2014–2018 Chevrolet Silverado 1500 and GMC Sierra 1500 models equipped with 4.3L and 5.3L engines. Built using \u003cstrong data-start=\"570\" data-end=\"607\"\u003e100% stainless-steel construction\u003c\/strong\u003e, it provides outstanding corrosion resistance and long-lasting durability versus aluminized steel mufflers.\u003c\/p\u003e\n\u003cp data-start=\"717\" data-end=\"1129\"\u003eFeaturing OE-style domed heads, louvered tubes, and precision acoustic tuning, the 21919 delivers a refined factory-correct exhaust tone. Internal partitions and mechanically joined tubes allow expansion and contraction during heat cycling without distortion, ensuring reliability under heavy-duty use. With OE-style hangers and pipe routing, the muffler installs quickly and accurately with no welding required.\u003c\/p\u003e\n\u003cp data-start=\"1131\" data-end=\"1307\"\u003eEngineered for superior flow, durability, and quiet performance, this Quiet-Flow® SS muffler restores smooth and efficient exhaust operation in hardworking GM full-size trucks.\u003c\/p\u003e\n\u003chr data-start=\"1309\" data-end=\"1312\"\u003e\n\u003ch2 data-start=\"1314\" data-end=\"1329\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1331\" data-end=\"1870\"\u003e\n\u003cli data-start=\"1331\" data-end=\"1401\"\u003e\n\u003cp data-start=\"1333\" data-end=\"1401\"\u003e\u003cstrong data-start=\"1333\" data-end=\"1362\"\u003e100% Stainless-Steel Body\u003c\/strong\u003e for exceptional corrosion protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1402\" data-end=\"1481\"\u003e\n\u003cp data-start=\"1404\" data-end=\"1481\"\u003e\u003cstrong data-start=\"1404\" data-end=\"1439\"\u003eDirect-Fit Bolt-On Installation\u003c\/strong\u003e using OE-style hangers and pipe routing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1482\" data-end=\"1555\"\u003e\n\u003cp data-start=\"1484\" data-end=\"1555\"\u003e\u003cstrong data-start=\"1484\" data-end=\"1517\"\u003eOE-Style Acoustic Engineering\u003c\/strong\u003e delivers premium factory-like sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1556\" data-end=\"1633\"\u003e\n\u003cp data-start=\"1558\" data-end=\"1633\"\u003e\u003cstrong data-start=\"1558\" data-end=\"1616\"\u003eMechanically Joined Internal Tubes \u0026amp; Spun-Locked Heads\u003c\/strong\u003e for durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1634\" data-end=\"1708\"\u003e\n\u003cp data-start=\"1636\" data-end=\"1708\"\u003e\u003cstrong data-start=\"1636\" data-end=\"1664\"\u003eInternal Drainage System\u003c\/strong\u003e reduces moisture and extends service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1709\" data-end=\"1782\"\u003e\n\u003cp data-start=\"1711\" data-end=\"1782\"\u003e\u003cstrong data-start=\"1711\" data-end=\"1747\"\u003eFlow-Tested \u0026amp; Acoustically Tuned\u003c\/strong\u003e to meet OE performance standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1783\" data-end=\"1870\"\u003e\n\u003cp data-start=\"1785\" data-end=\"1870\"\u003e\u003cstrong data-start=\"1785\" data-end=\"1833\"\u003eBacked by Walker’s Limited Lifetime Warranty\u003c\/strong\u003e and 90-Day Safe \u0026amp; Sound® Guarantee\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1872\" data-end=\"1875\"\u003e\n\u003ch2 data-start=\"1877\" data-end=\"1904\"\u003eTechnical Specifications\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=\"1906\" data-end=\"2522\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1906\" data-end=\"1932\"\u003e\n\u003ctr data-start=\"1906\" data-end=\"1932\"\u003e\n\u003cth data-start=\"1906\" data-end=\"1922\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"1922\" data-end=\"1932\" data-col-size=\"sm\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1959\" data-end=\"2522\"\u003e\n\u003ctr data-start=\"1959\" data-end=\"1975\"\u003e\n\u003ctd data-start=\"1959\" data-end=\"1967\" data-col-size=\"sm\"\u003eShape\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1967\" data-end=\"1975\"\u003eOval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1976\" data-end=\"1996\"\u003e\n\u003ctd data-start=\"1976\" data-end=\"1985\" data-col-size=\"sm\"\u003eFinish\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1985\" data-end=\"1996\"\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1997\" data-end=\"2032\"\u003e\n\u003ctd data-start=\"1997\" data-end=\"2013\" data-col-size=\"sm\"\u003eBody Material\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2013\" data-end=\"2032\"\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2033\" data-end=\"2065\"\u003e\n\u003ctd data-start=\"2033\" data-end=\"2046\" data-col-size=\"sm\"\u003eInlet Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2046\" data-end=\"2065\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2066\" data-end=\"2099\"\u003e\n\u003ctd data-start=\"2066\" data-end=\"2080\" data-col-size=\"sm\"\u003eOutlet Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2080\" data-end=\"2099\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2100\" data-end=\"2136\"\u003e\n\u003ctd data-start=\"2100\" data-end=\"2124\" data-col-size=\"sm\"\u003eInlet Inside Diameter\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2124\" data-end=\"2136\"\u003e2.625 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2137\" data-end=\"2174\"\u003e\n\u003ctd data-start=\"2137\" data-end=\"2162\" data-col-size=\"sm\"\u003eOutlet Inside Diameter\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2162\" data-end=\"2174\"\u003e2.625 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2175\" data-end=\"2202\"\u003e\n\u003ctd data-start=\"2175\" data-end=\"2192\" data-col-size=\"sm\"\u003eInlet Location\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2192\" data-end=\"2202\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2203\" data-end=\"2231\"\u003e\n\u003ctd data-start=\"2203\" data-end=\"2221\" data-col-size=\"sm\"\u003eOutlet Location\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2221\" data-end=\"2231\"\u003eCenter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2232\" data-end=\"2254\"\u003e\n\u003ctd data-start=\"2232\" data-end=\"2249\" data-col-size=\"sm\"\u003eInlet Quantity\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2249\" data-end=\"2254\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2255\" data-end=\"2278\"\u003e\n\u003ctd data-start=\"2255\" data-end=\"2273\" data-col-size=\"sm\"\u003eOutlet Quantity\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2273\" data-end=\"2278\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2279\" data-end=\"2305\"\u003e\n\u003ctd data-start=\"2279\" data-end=\"2293\" data-col-size=\"sm\"\u003eBody Height\u003c\/td\u003e\n\u003ctd data-start=\"2293\" data-end=\"2305\" data-col-size=\"sm\"\u003e5.500 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2306\" data-end=\"2333\"\u003e\n\u003ctd data-start=\"2306\" data-end=\"2320\" data-col-size=\"sm\"\u003eBody Length\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2320\" data-end=\"2333\"\u003e21.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2334\" data-end=\"2360\"\u003e\n\u003ctd data-start=\"2334\" data-end=\"2347\" data-col-size=\"sm\"\u003eBody Width\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2347\" data-end=\"2360\"\u003e11.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2361\" data-end=\"2391\"\u003e\n\u003ctd data-start=\"2361\" data-end=\"2378\" data-col-size=\"sm\"\u003eOverall Length\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2378\" data-end=\"2391\"\u003e25.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2392\" data-end=\"2419\"\u003e\n\u003ctd data-start=\"2392\" data-end=\"2407\" data-col-size=\"sm\"\u003eInlet Offset\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2407\" data-end=\"2419\"\u003e3.500 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2420\" data-end=\"2439\"\u003e\n\u003ctd data-start=\"2420\" data-end=\"2433\" data-col-size=\"sm\"\u003eReversible\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2433\" data-end=\"2439\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2440\" data-end=\"2456\"\u003e\n\u003ctd data-start=\"2440\" data-end=\"2450\" data-col-size=\"sm\"\u003eTunable\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2450\" data-end=\"2456\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2457\" data-end=\"2497\"\u003e\n\u003ctd data-start=\"2457\" data-end=\"2485\" data-col-size=\"sm\"\u003eUniversal or Specific Fit\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2485\" data-end=\"2497\"\u003eSpecific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2498\" data-end=\"2522\"\u003e\n\u003ctd data-start=\"2498\" data-end=\"2511\" data-col-size=\"sm\"\u003eGrade Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2511\" data-end=\"2522\"\u003ePremium\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=\"2524\" data-end=\"2527\"\u003e\n\u003ch2 data-start=\"2529\" data-end=\"2555\"\u003eVehicle Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"2556\" data-end=\"2616\"\u003e\u003cem data-start=\"2556\" data-end=\"2616\"\u003e(One muffler required per vehicle unless otherwise noted.)\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"2618\" data-end=\"2635\"\u003e\u003cstrong data-start=\"2622\" data-end=\"2635\"\u003eChevrolet\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4 data-start=\"2636\" data-end=\"2657\"\u003eSilverado 1500\u003c\/h4\u003e\n\u003cul data-start=\"2658\" data-end=\"2742\"\u003e\n\u003cli data-start=\"2658\" data-end=\"2704\"\u003e\n\u003cp data-start=\"2660\" data-end=\"2704\"\u003e\u003cstrong data-start=\"2660\" data-end=\"2690\"\u003e5.3L V8 (5328cc \/ 325 cid)\u003c\/strong\u003e → 2014–2018\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2705\" data-end=\"2742\"\u003e\n\u003cp data-start=\"2707\" data-end=\"2742\"\u003e\u003cstrong data-start=\"2707\" data-end=\"2728\"\u003e4.3L V6 (262 cid)\u003c\/strong\u003e → 2014–2018\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2744\" data-end=\"2747\"\u003e\n\u003ch3 data-start=\"2749\" data-end=\"2760\"\u003e\u003cstrong data-start=\"2753\" data-end=\"2760\"\u003eGMC\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4 data-start=\"2761\" data-end=\"2779\"\u003eSierra 1500\u003c\/h4\u003e\n\u003cul data-start=\"2780\" data-end=\"2864\"\u003e\n\u003cli data-start=\"2780\" data-end=\"2826\"\u003e\n\u003cp data-start=\"2782\" data-end=\"2826\"\u003e\u003cstrong data-start=\"2782\" data-end=\"2812\"\u003e5.3L V8 (5328cc \/ 325 cid)\u003c\/strong\u003e → 2014–2018\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2827\" data-end=\"2864\"\u003e\n\u003cp data-start=\"2829\" data-end=\"2864\"\u003e\u003cstrong data-start=\"2829\" data-end=\"2850\"\u003e4.3L V6 (262 cid)\u003c\/strong\u003e → 2014–2018\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2866\" data-end=\"2869\"\u003e\n\u003ch2 data-start=\"2871\" data-end=\"2903\"\u003eInstallation \u0026amp; Warranty Notes\u003c\/h2\u003e\n\u003cul data-start=\"2905\" data-end=\"3206\"\u003e\n\u003cli data-start=\"2905\" data-end=\"2974\"\u003e\n\u003cp data-start=\"2907\" data-end=\"2974\"\u003eDesigned for direct bolt-on replacement—no modifications required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2975\" data-end=\"3033\"\u003e\n\u003cp data-start=\"2977\" data-end=\"3033\"\u003eReplace exhaust clamps or seals as needed for best fit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3034\" data-end=\"3099\"\u003e\n\u003cp data-start=\"3036\" data-end=\"3099\"\u003eStainless-steel construction greatly extends muffler lifespan\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3100\" data-end=\"3154\"\u003e\n\u003cp data-start=\"3102\" data-end=\"3154\"\u003eRestores OE backpressure and sound characteristics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3155\" data-end=\"3206\"\u003e\n\u003cp data-start=\"3157\" data-end=\"3206\"\u003eProtected by Walker’s limited lifetime warranty\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALKER","offers":[{"title":"Default Title","offer_id":45856237387975,"sku":"WAL21919","price":136.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2025-11-21153757.png?v=1763768225","url":"https:\/\/mainstreeteshop.com\/products\/walker-exhaust-muffler-21919","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}