{"product_id":"catalytic-converter-for-ford-explorer-1991-1994-4-0l-rear","title":"Catalytic Converter for Ford Explorer (1991-1994) 4.0L Rear","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Rear Catalytic Converter for 1991-1994 Ford Explorer (UN46)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The rear catalytic converter cleans downstream exhaust emissions and restores factory scavenging flow on the 1991-1994 Ford Explorer to eliminate exhaust restrictions and off-gas odors.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Explorer Exhaust Flow Restriction \u0026amp; Catalyst Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust converters on the first-generation \u003cstrong\u003eUN46\u003c\/strong\u003e chassis frequently succumb to thermal fatigue, internal washcoat sintering, and substrate fracturing after decades of service. When unburned hydrocarbons and carbon soot from the aging pushrod engine contaminate the original core, the ceramic monolith clogs. This creates excessive exhaust backpressure upstream, suffocating engine efficiency, spiking cylinder head temperatures, and triggering failed emissions inspections due to depleted catalyst precious metal loading.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement rear catalytic converter assembly features a heavy-gauge \u003cstrong\u003eStainless Steel\u003c\/strong\u003e outer shell engineered to resist road salt corrosion and weld failure. Inside, a high-efficiency ceramic honeycomb monolith provides an expansive surface area coated with catalyst washcoat to efficiently reduce carbon monoxide (CO), hydrocarbons (HC), and oxides of nitrogen (NOx). Built with precision-aligned mounting flanges that line up to stock hangers, this assembly eliminates the need for cutting or custom fabrication, ensuring factory-spec exhaust backpressure and reliable emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \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;\"\u003e1991-1994 Ford Explorer\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;\"\u003e\n\u003cstrong\u003eCologne 4.0L V6 (OHV)\u003c\/strong\u003e \/ \u003cstrong\u003eUN46\u003c\/strong\u003e\n\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;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e160 hp \/ 220 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\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;\"\u003e\u003cstrong\u003e23154\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1991 Ford Explorer 4.0L V6 (Rear Position)\u003c\/li\u003e\n  \u003cli\u003e1992 Ford Explorer 4.0L V6 (Rear Position)\u003c\/li\u003e\n  \u003cli\u003e1993 Ford Explorer 4.0L V6 (Rear Position)\u003c\/li\u003e\n  \u003cli\u003e1994 Ford Explorer 4.0L V6 (Rear Position)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the UN46 Explorer?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1991-1994 Ford Explorer equipped with the \u003cstrong\u003eCologne 4.0L V6 (OHV)\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eIs this catalytic converter legal for road use in California?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit is 46-state legal (EPA compliant) and cannot be shipped to or registered on vehicles in California, New York, Colorado, or Maine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Utility Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle harsh underbody conditions, off-road vibrations, and high-temp exhaust cycling, this converter restores the towing confidence, low-end torque, and rugged reliability expected from your utility platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67537898143992,"sku":"DS-EKLZGIAHZ","price":219.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-ford-explorer-1991-1994-4-0l-rear-1.jpg?v=1790619514","url":"https:\/\/performancechiptuning.com\/products\/catalytic-converter-for-ford-explorer-1991-1994-4-0l-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}