{"product_id":"catalytic-converter-for-nissan-armada-2017-2021-5-6l-left-and-right","title":"Catalytic Converter for Nissan Armada (2017-2021) 5.6L Left and Right","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Manifold Catalytic Converter Set for 2017-2021 Nissan Armada (Y62)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct-fit left and right exhaust manifold catalytic converter pair replaces the bank 1 and bank 2 primary emissions assemblies on the 2017-2021 Nissan Armada (\u003cstrong\u003eY62\u003c\/strong\u003e) \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e to restore exhaust flow and catalyst efficiency.\u003c\/p\u003e\u003ch3\u003eThe Stock Nissan Armada Manifold Converter Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eY62\u003c\/strong\u003e platform powered by the \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e, the primary catalytic converters are integrated directly into the exhaust manifolds adjacent to the cylinder heads. Severe thermal cycling, sustained towing loads, and rich-running misfires subject the factory ceramic monolith to extreme heat soak, causing internal substrate cracking or washcoat degradation. Once the honeycomb fractures, loose ceramic fragments obstruct exhaust flow and trigger downstream oxygen sensor faults such as \u003cstrong\u003eP0420\u003c\/strong\u003e and \u003cstrong\u003eP0430\u003c\/strong\u003e, replacing OEM units \u003cstrong\u003e140021LA0C\u003c\/strong\u003e and \u003cstrong\u003e140021LA0D\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Manifold Catalytic Converter\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Triggers \u003cstrong\u003eP0420\u003c\/strong\u003e (Bank 1) or \u003cstrong\u003eP0430\u003c\/strong\u003e (Bank 2) catalyst system efficiency codes when precious-metal washcoat conversion drops below ECU thresholds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudible Substrate Rattle:\u003c\/strong\u003e Fractured internal ceramic honeycomb pieces vibrate inside the manifold shell during cold starts or under acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Backpressure \u0026amp; Power Loss:\u003c\/strong\u003e Blocked catalyst passages restrict scavenging on the \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e, causing sluggish throttle response, elevated exhaust temperatures, and failed emissions inspections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Stainless Exhaust Solution\u003c\/h3\u003e\u003cp\u003eThis two-piece manifold-converter assembly uses heavy-gauge stainless steel runners and housings to resist external corrosion and thermal fatigue cracking on both cylinder banks. Inside each unit, a high-flow ceramic honeycomb substrate coated with a precious-metal washcoat converts HC, CO, and NOx emissions to satisfy OBD-II monitoring parameters. Factory-positioned cylinder head flanges, mounting brackets, and threaded O2 sensor bungs ensure direct bolt-on alignment without cutting or welding, restoring balanced bank-to-bank backpressure across the \u003cstrong\u003eY62\u003c\/strong\u003e chassis.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 x Exhaust Manifold Catalytic Converters (Left \/ Driver Side and Right \/ Passenger Side)\u003c\/li\u003e\n\u003cli\u003e2 x Manifold Gaskets\u003c\/li\u003e\n\u003cli\u003e2 x Outlet Ring Gaskets\u003c\/li\u003e\n\u003cli\u003eStuds, bolts, and nuts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2017-2021 Nissan Armada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eVK56VD 5.6L V8 \/ Y62\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEmissions \u0026amp; Substrate\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEPA Federal (46-State Legal) \/ Ceramic Honeycomb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Bolt-On OEM Replacement (No Cutting or Welding)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e140021LA0C, 140021LA0D, 327-50674R, 327-50675L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2017, 2018, 2019, 2020, 2021 Nissan Armada SV (5.6L V8, Left \u0026amp; Right)\u003c\/li\u003e\n\u003cli\u003e2017, 2018, 2019, 2020, 2021 Nissan Armada SL (5.6L V8, Left \u0026amp; Right)\u003c\/li\u003e\n\u003cli\u003e2017, 2018, 2019, 2020, 2021 Nissan Armada Platinum (5.6L V8, Left \u0026amp; Right)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the Y62 Armada?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 2017-2021 Nissan Armada equipped with the \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e engine. \u003cstrong\u003eThis set does not fit 2005-2015 Armada models, and because it is EPA federal compliant (not CARB approved), it is not legal for vehicles registered in California, New York, Colorado, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0420\/P0430 codes, and are O2 sensors included?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, it resolves catalyst-efficiency codes caused by a depleted converter, though oxygen sensors are not included.\u003c\/strong\u003e Transfer your existing O2 sensors or install new units after checking for upstream exhaust leaks when replacing \u003cstrong\u003e140021LA0C\u003c\/strong\u003e and \u003cstrong\u003e140021LA0D\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eAre gaskets and mounting hardware included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Both manifold gaskets, both outlet ring gaskets, and mounting studs, bolts, and nuts are included; allow the exhaust to cool completely, soak fasteners with penetrating oil, and torque all flange bolts evenly before checking for leaks.\u003c\/p\u003e\u003ch3\u003eThe Nissan Heavy-Duty Standard\u003c\/h3\u003e\u003cp\u003eEngineered for full-size \u003cstrong\u003eY62\u003c\/strong\u003e SUV duty cycles, these dual manifold converters handle sustained towing heat while maintaining reliable emissions compliance. Replacing both banks simultaneously restores balanced exhaust scavenging and long-term drivetrain durability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68083824394488,"sku":"DS-EYZJQ5609","price":425.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-nissan-armada-2017-2021-5-6l-left-and-right-1.jpg?v=1794533870","url":"https:\/\/performancechiptuning.com\/de\/products\/catalytic-converter-for-nissan-armada-2017-2021-5-6l-left-and-right","provider":"Performance Chip Tuning","version":"1.0","type":"link"}