{"product_id":"walker-exhaust-muffler-21476","title":"WALKER - Exhaust Muffler - 21476","description":"\u003ch2 data-start=\"301\" data-end=\"323\"\u003eProduct Description\u003c\/h2\u003e\n\u003cp data-start=\"325\" data-end=\"669\"\u003eThe WALKER 21476 Exhaust Muffler is engineered to provide reliable noise reduction and durable performance for a wide range of hard-working commercial vehicles. Manufactured from \u003cstrong data-start=\"504\" data-end=\"524\"\u003ealuminized steel\u003c\/strong\u003e, this muffler offers enhanced corrosion resistance and long service life, making it a dependable replacement for aging or failing OE components.\u003c\/p\u003e\n\u003cp data-start=\"671\" data-end=\"998\"\u003eDesigned to help reduce both in-cab and exterior noise levels, the 21476 supports quieter operation even under continuous heavy-duty use. With multiple configurations available across Walker’s commercial lineup, this universal-fit muffler is built to accommodate common installation requirements with an economical price point.\u003c\/p\u003e\n\u003cp data-start=\"1000\" data-end=\"1201\"\u003eWhether replacing a worn-out unit or upgrading for improved sound control, the 21476 provides a practical OE-quality solution for commercial fleets, delivery vehicles, and industrial chassis platforms.\u003c\/p\u003e\n\u003chr data-start=\"1203\" data-end=\"1206\"\u003e\n\u003ch2 data-start=\"1208\" data-end=\"1223\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1225\" data-end=\"1689\"\u003e\n\u003cli data-start=\"1225\" data-end=\"1307\"\u003e\n\u003cp data-start=\"1227\" data-end=\"1307\"\u003e\u003cstrong data-start=\"1227\" data-end=\"1260\"\u003eAluminized Steel Construction\u003c\/strong\u003e enhances durability and corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1308\" data-end=\"1391\"\u003e\n\u003cp data-start=\"1310\" data-end=\"1391\"\u003e\u003cstrong data-start=\"1310\" data-end=\"1344\"\u003eEngineered for Noise Reduction\u003c\/strong\u003e to minimize in-cab and exterior engine sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1392\" data-end=\"1466\"\u003e\n\u003cp data-start=\"1394\" data-end=\"1466\"\u003e\u003cstrong data-start=\"1394\" data-end=\"1415\"\u003eUniversal Fitment\u003c\/strong\u003e supports a wide range of commercial applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1467\" data-end=\"1531\"\u003e\n\u003cp data-start=\"1469\" data-end=\"1531\"\u003e\u003cstrong data-start=\"1469\" data-end=\"1498\"\u003eEconomical OE Replacement\u003c\/strong\u003e designed for long service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1532\" data-end=\"1605\"\u003e\n\u003cp data-start=\"1534\" data-end=\"1605\"\u003e\u003cstrong data-start=\"1534\" data-end=\"1556\"\u003eWide Compatibility\u003c\/strong\u003e across domestic and import commercial vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1606\" data-end=\"1689\"\u003e\n\u003cp data-start=\"1608\" data-end=\"1689\"\u003e\u003cstrong data-start=\"1608\" data-end=\"1644\"\u003eReliable Mechanical Construction\u003c\/strong\u003e for consistent performance under heavy use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1691\" data-end=\"1694\"\u003e\n\u003ch2 data-start=\"1696\" data-end=\"1723\"\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=\"1725\" data-end=\"2335\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1725\" data-end=\"1751\"\u003e\n\u003ctr data-start=\"1725\" data-end=\"1751\"\u003e\n\u003cth data-start=\"1725\" data-end=\"1741\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"1741\" data-end=\"1751\" data-col-size=\"sm\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1778\" data-end=\"2335\"\u003e\n\u003ctr data-start=\"1778\" data-end=\"1795\"\u003e\n\u003ctd data-start=\"1778\" data-end=\"1786\" data-col-size=\"sm\"\u003eShape\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1786\" data-end=\"1795\"\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1796\" data-end=\"1819\"\u003e\n\u003ctd data-start=\"1796\" data-end=\"1805\" data-col-size=\"sm\"\u003eFinish\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1805\" data-end=\"1819\"\u003eAluminized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1820\" data-end=\"1845\"\u003e\n\u003ctd data-start=\"1820\" data-end=\"1836\" data-col-size=\"sm\"\u003eBody Material\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1836\" data-end=\"1845\"\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1846\" data-end=\"1878\"\u003e\n\u003ctd data-start=\"1846\" data-end=\"1859\" data-col-size=\"sm\"\u003eInlet Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1859\" data-end=\"1878\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1879\" data-end=\"1912\"\u003e\n\u003ctd data-start=\"1879\" data-end=\"1893\" data-col-size=\"sm\"\u003eOutlet Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1893\" data-end=\"1912\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1913\" data-end=\"1949\"\u003e\n\u003ctd data-start=\"1913\" data-end=\"1937\" data-col-size=\"sm\"\u003eInlet Inside Diameter\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1937\" data-end=\"1949\"\u003e3.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1950\" data-end=\"1987\"\u003e\n\u003ctd data-start=\"1950\" data-end=\"1975\" data-col-size=\"sm\"\u003eOutlet Inside Diameter\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"1975\" data-end=\"1987\"\u003e3.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1988\" data-end=\"2015\"\u003e\n\u003ctd data-start=\"1988\" data-end=\"2005\" data-col-size=\"sm\"\u003eInlet Location\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2005\" data-end=\"2015\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2016\" data-end=\"2044\"\u003e\n\u003ctd data-start=\"2016\" data-end=\"2034\" data-col-size=\"sm\"\u003eOutlet Location\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2034\" data-end=\"2044\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2045\" data-end=\"2067\"\u003e\n\u003ctd data-start=\"2045\" data-end=\"2062\" data-col-size=\"sm\"\u003eInlet Quantity\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2062\" data-end=\"2067\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2068\" data-end=\"2091\"\u003e\n\u003ctd data-start=\"2068\" data-end=\"2086\" data-col-size=\"sm\"\u003eOutlet Quantity\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2086\" data-end=\"2091\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2092\" data-end=\"2118\"\u003e\n\u003ctd data-start=\"2092\" data-end=\"2106\" data-col-size=\"sm\"\u003eBody Height\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2106\" data-end=\"2118\"\u003e8.375 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2119\" data-end=\"2144\"\u003e\n\u003ctd data-start=\"2119\" data-end=\"2132\" data-col-size=\"sm\"\u003eBody Width\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2132\" data-end=\"2144\"\u003e8.375 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2145\" data-end=\"2172\"\u003e\n\u003ctd data-start=\"2145\" data-end=\"2159\" data-col-size=\"sm\"\u003eBody Length\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2159\" data-end=\"2172\"\u003e29.750 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2173\" data-end=\"2203\"\u003e\n\u003ctd data-start=\"2173\" data-end=\"2190\" data-col-size=\"sm\"\u003eOverall Length\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2190\" data-end=\"2203\"\u003e36.250 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2204\" data-end=\"2231\"\u003e\n\u003ctd data-start=\"2204\" data-end=\"2219\" data-col-size=\"sm\"\u003eInlet Offset\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2219\" data-end=\"2231\"\u003e2.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2232\" data-end=\"2251\"\u003e\n\u003ctd data-start=\"2232\" data-end=\"2245\" data-col-size=\"sm\"\u003eReversible\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2245\" data-end=\"2251\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2252\" data-end=\"2268\"\u003e\n\u003ctd data-start=\"2252\" data-end=\"2262\" data-col-size=\"sm\"\u003eTunable\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2262\" data-end=\"2268\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2269\" data-end=\"2310\"\u003e\n\u003ctd data-start=\"2269\" data-end=\"2297\" data-col-size=\"sm\"\u003eUniversal or Specific Fit\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2297\" data-end=\"2310\"\u003eUniversal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2311\" data-end=\"2335\"\u003e\n\u003ctd data-start=\"2311\" data-end=\"2324\" data-col-size=\"sm\"\u003eGrade Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2324\" data-end=\"2335\"\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=\"2337\" data-end=\"2340\"\u003e\n\u003ch2 data-start=\"2342\" data-end=\"2368\"\u003eVehicle Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"2369\" data-end=\"2470\"\u003e\u003cem data-start=\"2369\" data-end=\"2470\"\u003e(Universal fit muffler; listed vehicles indicate known compatible applications requiring one unit.)\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"2472\" data-end=\"2489\"\u003e\u003cstrong data-start=\"2476\" data-end=\"2489\"\u003eChevrolet\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2491\" data-end=\"2520\"\u003e\u003cstrong data-start=\"2491\" data-end=\"2518\"\u003eP30 — 3.9L L4 (239 cid)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2521\" data-end=\"2534\"\u003e\n\u003cli data-start=\"2521\" data-end=\"2534\"\u003e\n\u003cp data-start=\"2523\" data-end=\"2534\"\u003e1990–1991\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2536\" data-end=\"2539\"\u003e\n\u003ch3 data-start=\"2541\" data-end=\"2552\"\u003e\u003cstrong data-start=\"2545\" data-end=\"2552\"\u003eGMC\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2554\" data-end=\"2585\"\u003e\u003cstrong data-start=\"2554\" data-end=\"2583\"\u003eP3500 — 3.9L L4 (239 cid)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2586\" data-end=\"2599\"\u003e\n\u003cli data-start=\"2586\" data-end=\"2599\"\u003e\n\u003cp data-start=\"2588\" data-end=\"2599\"\u003e1989–1991\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2601\" data-end=\"2604\"\u003e\n\u003ch3 data-start=\"2606\" data-end=\"2627\"\u003e\u003cstrong data-start=\"2610\" data-end=\"2627\"\u003eInternational\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2629\" data-end=\"2664\"\u003e\u003cstrong data-start=\"2629\" data-end=\"2662\"\u003eCargostar — 5.7L V8 (345 cid)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2665\" data-end=\"2678\"\u003e\n\u003cli data-start=\"2665\" data-end=\"2678\"\u003e\n\u003cp data-start=\"2667\" data-end=\"2678\"\u003e1980–1983\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2680\" data-end=\"2715\"\u003e\u003cstrong data-start=\"2680\" data-end=\"2713\"\u003eCargostar — 6.4L V8 (392 cid)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2716\" data-end=\"2724\"\u003e\n\u003cli data-start=\"2716\" data-end=\"2724\"\u003e\n\u003cp data-start=\"2718\" data-end=\"2724\"\u003e1980\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2726\" data-end=\"2729\"\u003e\n\u003ch2 data-start=\"2731\" data-end=\"2763\"\u003eInstallation \u0026amp; Warranty Notes\u003c\/h2\u003e\n\u003cul data-start=\"2765\" data-end=\"3105\"\u003e\n\u003cli data-start=\"2765\" data-end=\"2840\"\u003e\n\u003cp data-start=\"2767\" data-end=\"2840\"\u003eUniversal-fit muffler—verify sizing and alignment prior to installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2841\" data-end=\"2902\"\u003e\n\u003cp data-start=\"2843\" data-end=\"2902\"\u003eOE-style pipe connections for straightforward integration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2903\" data-end=\"2965\"\u003e\n\u003cp data-start=\"2905\" data-end=\"2965\"\u003eWelding may be required depending on vehicle configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2966\" data-end=\"3027\"\u003e\n\u003cp data-start=\"2968\" data-end=\"3027\"\u003eInspect clamps, brackets, and hangers and replace if worn\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3028\" data-end=\"3105\"\u003e\n\u003cp data-start=\"3030\" data-end=\"3105\"\u003eEnsure proper clearance and secure mounting to prevent vibration or leaks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALKER","offers":[{"title":"Default Title","offer_id":45855916458183,"sku":"WAL21476","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2025-11-21104013.png?v=1763750361","url":"https:\/\/mainstreeteshop.com\/products\/walker-exhaust-muffler-21476","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}