{"product_id":"walker-exhaust-muffler-21558","title":"WALKER - Exhaust Muffler - 21558","description":"\u003ch2 data-start=\"326\" data-end=\"348\"\u003eProduct Description\u003c\/h2\u003e\n\u003cp data-start=\"350\" data-end=\"779\"\u003eThe WALKER 21558 Quiet-Flow® SS Exhaust Muffler is a premium, direct-fit replacement engineered to deliver OE-style sound, long-lasting durability, and reliable exhaust performance for select Chevrolet Impala and Monte Carlo models. As the only broad-market muffler constructed with \u003cstrong data-start=\"633\" data-end=\"657\"\u003e100% stainless steel\u003c\/strong\u003e, the Quiet-Flow SS series offers superior corrosion resistance and dramatically longer life than aluminized alternatives.\u003c\/p\u003e\n\u003cp data-start=\"781\" data-end=\"1166\"\u003eInternal partitions and mechanically joined tubes allow the muffler to expand and contract with temperature changes while retaining structural integrity. OE-style louvered tubes and domed heads improve acoustic tuning and reduce radiated noise, delivering smooth, factory-correct sound quality. The integrated internal drainage system helps remove moisture, further reducing corrosion.\u003c\/p\u003e\n\u003cp data-start=\"1168\" data-end=\"1460\"\u003eDesigned for effortless installation, the WALKER 21558 features OE-style hangers, brackets, and pipe routing, making it a true bolt-on solution without welding or custom fabrication. Every Quiet-Flow SS muffler is acoustic and flow tested to ensure dependable performance and precise fitment.\u003c\/p\u003e\n\u003chr data-start=\"1462\" data-end=\"1465\"\u003e\n\u003ch2 data-start=\"1467\" data-end=\"1482\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1484\" data-end=\"2017\"\u003e\n\u003cli data-start=\"1484\" data-end=\"1571\"\u003e\n\u003cp data-start=\"1486\" data-end=\"1571\"\u003e\u003cstrong data-start=\"1486\" data-end=\"1523\"\u003e100% Stainless-Steel Construction\u003c\/strong\u003e for maximum rust resistance and extended life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1572\" data-end=\"1646\"\u003e\n\u003cp data-start=\"1574\" data-end=\"1646\"\u003e\u003cstrong data-start=\"1574\" data-end=\"1609\"\u003eDirect-Fit Bolt-On Installation\u003c\/strong\u003e with OE-style hangers and brackets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1647\" data-end=\"1725\"\u003e\n\u003cp data-start=\"1649\" data-end=\"1725\"\u003e\u003cstrong data-start=\"1649\" data-end=\"1679\"\u003eDurable Internal Structure\u003c\/strong\u003e allows thermal expansion without distortion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1726\" data-end=\"1801\"\u003e\n\u003cp data-start=\"1728\" data-end=\"1801\"\u003e\u003cstrong data-start=\"1728\" data-end=\"1753\"\u003ePremium Sound Control\u003c\/strong\u003e using OE-style louvered tubes and domed heads\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1802\" data-end=\"1864\"\u003e\n\u003cp data-start=\"1804\" data-end=\"1864\"\u003e\u003cstrong data-start=\"1804\" data-end=\"1832\"\u003eInternal Drainage System\u003c\/strong\u003e reduces moisture accumulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1865\" data-end=\"1925\"\u003e\n\u003cp data-start=\"1867\" data-end=\"1925\"\u003e\u003cstrong data-start=\"1867\" data-end=\"1896\"\u003eFlow \u0026amp; Acoustic Validated\u003c\/strong\u003e for OE-quality performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1926\" data-end=\"2017\"\u003e\n\u003cp data-start=\"1928\" data-end=\"2017\"\u003e\u003cstrong data-start=\"1928\" data-end=\"1976\"\u003eBacked by Walker’s Limited Lifetime Warranty\u003c\/strong\u003e and \u003cstrong data-start=\"1981\" data-end=\"2015\"\u003e90-Day Safe \u0026amp; Sound® Guarantee\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2019\" data-end=\"2022\"\u003e\n\u003ch2 data-start=\"2024\" data-end=\"2051\"\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=\"2053\" data-end=\"2687\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2053\" data-end=\"2079\"\u003e\n\u003ctr data-start=\"2053\" data-end=\"2079\"\u003e\n\u003cth data-start=\"2053\" data-end=\"2069\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"2069\" data-end=\"2079\" data-col-size=\"sm\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2106\" data-end=\"2687\"\u003e\n\u003ctr data-start=\"2106\" data-end=\"2122\"\u003e\n\u003ctd data-start=\"2106\" data-end=\"2114\" data-col-size=\"sm\"\u003eShape\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2114\" data-end=\"2122\"\u003eOval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2123\" data-end=\"2146\"\u003e\n\u003ctd data-start=\"2123\" data-end=\"2132\" data-col-size=\"sm\"\u003eFinish\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2132\" data-end=\"2146\"\u003eAluminized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2147\" data-end=\"2182\"\u003e\n\u003ctd data-start=\"2147\" data-end=\"2163\" data-col-size=\"sm\"\u003eBody Material\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2163\" data-end=\"2182\"\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2183\" data-end=\"2215\"\u003e\n\u003ctd data-start=\"2183\" data-end=\"2196\" data-col-size=\"sm\"\u003eInlet Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2196\" data-end=\"2215\"\u003ePipe Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2216\" data-end=\"2237\"\u003e\n\u003ctd data-start=\"2216\" data-end=\"2230\" data-col-size=\"sm\"\u003eOutlet Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2230\" data-end=\"2237\"\u003eTip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2238\" data-end=\"2274\"\u003e\n\u003ctd data-start=\"2238\" data-end=\"2262\" data-col-size=\"sm\"\u003eInlet Inside Diameter\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2262\" data-end=\"2274\"\u003e2.250 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2275\" data-end=\"2313\"\u003e\n\u003ctd data-start=\"2275\" data-end=\"2301\" data-col-size=\"sm\"\u003eOutlet Outside Diameter\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2301\" data-end=\"2313\"\u003e2.250 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2314\" data-end=\"2341\"\u003e\n\u003ctd data-start=\"2314\" data-end=\"2331\" data-col-size=\"sm\"\u003eInlet Location\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2331\" data-end=\"2341\"\u003eOffset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2342\" data-end=\"2364\"\u003e\n\u003ctd data-start=\"2342\" data-end=\"2359\" data-col-size=\"sm\"\u003eInlet Quantity\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2359\" data-end=\"2364\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2365\" data-end=\"2393\"\u003e\n\u003ctd data-start=\"2365\" data-end=\"2383\" data-col-size=\"sm\"\u003eOutlet Location\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2383\" data-end=\"2393\"\u003eCenter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2394\" data-end=\"2417\"\u003e\n\u003ctd data-start=\"2394\" data-end=\"2412\" data-col-size=\"sm\"\u003eOutlet Quantity\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2412\" data-end=\"2417\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2418\" data-end=\"2444\"\u003e\n\u003ctd data-start=\"2418\" data-end=\"2432\" data-col-size=\"sm\"\u003eBody Height\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2432\" data-end=\"2444\"\u003e5.500 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2445\" data-end=\"2472\"\u003e\n\u003ctd data-start=\"2445\" data-end=\"2459\" data-col-size=\"sm\"\u003eBody Length\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2459\" data-end=\"2472\"\u003e15.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2473\" data-end=\"2499\"\u003e\n\u003ctd data-start=\"2473\" data-end=\"2486\" data-col-size=\"sm\"\u003eBody Width\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2486\" data-end=\"2499\"\u003e11.000 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2500\" data-end=\"2530\"\u003e\n\u003ctd data-start=\"2500\" data-end=\"2517\" data-col-size=\"sm\"\u003eOverall Length\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2517\" data-end=\"2530\"\u003e27.125 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2531\" data-end=\"2558\"\u003e\n\u003ctd data-start=\"2531\" data-end=\"2546\" data-col-size=\"sm\"\u003eInlet Offset\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2546\" data-end=\"2558\"\u003e3.750 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2559\" data-end=\"2584\"\u003e\n\u003ctd data-start=\"2559\" data-end=\"2577\" data-col-size=\"sm\"\u003eHanger Included\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2577\" data-end=\"2584\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2585\" data-end=\"2604\"\u003e\n\u003ctd data-start=\"2585\" data-end=\"2598\" data-col-size=\"sm\"\u003eReversible\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2598\" data-end=\"2604\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2605\" data-end=\"2621\"\u003e\n\u003ctd data-start=\"2605\" data-end=\"2615\" data-col-size=\"sm\"\u003eTunable\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2615\" data-end=\"2621\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2622\" data-end=\"2662\"\u003e\n\u003ctd data-start=\"2622\" data-end=\"2650\" data-col-size=\"sm\"\u003eUniversal or Specific Fit\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2650\" data-end=\"2662\"\u003eSpecific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2663\" data-end=\"2687\"\u003e\n\u003ctd data-start=\"2663\" data-end=\"2676\" data-col-size=\"sm\"\u003eGrade Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2676\" data-end=\"2687\"\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=\"2689\" data-end=\"2692\"\u003e\n\u003ch2 data-start=\"2694\" data-end=\"2720\"\u003eVehicle Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"2721\" data-end=\"2783\"\u003e\u003cem data-start=\"2721\" data-end=\"2783\"\u003e(Direct-fit applications. One muffler required per vehicle.)\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"2785\" data-end=\"2811\"\u003e\u003cstrong data-start=\"2789\" data-end=\"2811\"\u003eChevrolet – Impala\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2813\" data-end=\"2845\"\u003e\u003cstrong data-start=\"2813\" data-end=\"2843\"\u003e3.5L V6 (3490cc \/ 213 cid)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2846\" data-end=\"2859\"\u003e\n\u003cli data-start=\"2846\" data-end=\"2859\"\u003e\n\u003cp data-start=\"2848\" data-end=\"2859\"\u003e2006–2011\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2861\" data-end=\"2864\"\u003e\n\u003ch3 data-start=\"2866\" data-end=\"2897\"\u003e\u003cstrong data-start=\"2870\" data-end=\"2897\"\u003eChevrolet – Monte Carlo\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2899\" data-end=\"2931\"\u003e\u003cstrong data-start=\"2899\" data-end=\"2929\"\u003e3.5L V6 (3490cc \/ 213 cid)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2932\" data-end=\"2945\"\u003e\n\u003cli data-start=\"2932\" data-end=\"2945\"\u003e\n\u003cp data-start=\"2934\" data-end=\"2945\"\u003e2006–2007\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2947\" data-end=\"2950\"\u003e\n\u003ch2 data-start=\"2952\" data-end=\"2984\"\u003eInstallation \u0026amp; Warranty Notes\u003c\/h2\u003e\n\u003cul data-start=\"2986\" data-end=\"3317\"\u003e\n\u003cli data-start=\"2986\" data-end=\"3053\"\u003e\n\u003cp data-start=\"2988\" data-end=\"3053\"\u003eDesigned for \u003cstrong data-start=\"3001\" data-end=\"3031\"\u003edirect bolt-on replacement\u003c\/strong\u003e—no welding required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3054\" data-end=\"3114\"\u003e\n\u003cp data-start=\"3056\" data-end=\"3114\"\u003eInspect clamps, hangers, and gaskets before installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3115\" data-end=\"3183\"\u003e\n\u003cp data-start=\"3117\" data-end=\"3183\"\u003eEnsure proper inlet\/outlet orientation—muffler is not reversible\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3184\" data-end=\"3257\"\u003e\n\u003cp data-start=\"3186\" data-end=\"3257\"\u003eQuiet-Flow® SS mufflers are backed by a \u003cstrong data-start=\"3226\" data-end=\"3255\"\u003eLimited Lifetime Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3258\" data-end=\"3317\"\u003e\n\u003cp data-start=\"3260\" data-end=\"3317\"\u003eIncludes \u003cstrong data-start=\"3269\" data-end=\"3303\"\u003e90-Day Safe \u0026amp; Sound® Guarantee\u003c\/strong\u003e from Walker\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALKER","offers":[{"title":"Default Title","offer_id":45856012337351,"sku":"WAL21558","price":118.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2025-11-21112145.png?v=1763753038","url":"https:\/\/mainstreeteshop.com\/products\/walker-exhaust-muffler-21558","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}