{"product_id":"catalytic-converter-for-ford-expedition-1997-1998-4-6l-left","title":"Catalytic Converter for Ford Expedition (1997-1998) 4.6L Left","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Left Catalytic Converter for 1997-1998 Ford Expedition (UN93)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Left Catalytic Converter replaces the degraded factory driver-side emissions assembly on the 1997-1998 Ford Expedition to restore correct exhaust backpressure, resolve catalyst efficiency check engine lights, and maintain EPA-compliant exhaust flow.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Expedition Exhaust Degradation\u003c\/h3\u003e\n\u003cp\u003eWith decades of thermal expansion and prolonged duty cycles, factory ceramic substrates on the \u003cstrong\u003eUN93\u003c\/strong\u003e platform break down, erode, or suffer from internal carbon glazing. On the \u003cstrong\u003eModular 4.6L V8\u003c\/strong\u003e, a restricted driver-side converter creates asymmetric exhaust bank backpressure, elevated exhaust gas temperatures (EGTs), and persistent OBD-II catalyst monitoring trouble codes (such as P0420). Left unchecked, high backpressure chokes cylinder scavenging and robs low-end towing torque.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement left-bank assembly is manufactured with heavy-duty aluminized steel piping engineered to withstand road-salt corrosion and high thermal loads. Built to mirror factory routing, it features accurate factory-located oxygen sensor bungs, mandrel-formed transitions, and thick mounting flanges that seal flat against OEM manifolds without requiring cutting or custom welding. Inside, an advanced washcoat core provides high precious metal loading to convert carbon monoxide, hydrocarbons, and nitrogen oxides back to compliant baseline levels.\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;\"\u003e1997-1998 Ford Expedition (Left \/ Driver Side)\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;\"\u003eModular 4.6L V8 \/ UN93\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;\"\u003e215 hp \/ 290 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;\"\u003e30358, 794120\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\u003e1997-1998 Ford Expedition 4.6L V8 4WD Only (Driver Side)\u003c\/li\u003e\n  \u003cli\u003eDoes not fit 2WD configurations\u003c\/li\u003e\n  \u003cli\u003eDoes not fit 5.4L V8 engines\u003c\/li\u003e\n  \u003cli\u003eDoes not fit XLT Plus packages\u003c\/li\u003e\n  \u003cli\u003eEPA 46-State Legal (Not CARB compliant; cannot ship to CA, NY, CO, or ME)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the UN93 Expedition?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1997-1998 Ford Expedition equipped with the Modular 4.6L V8 engine and 4WD driveline.\u003c\/p\u003e\n\n\u003ch4\u003eWill this unit resolve catalyst efficiency check engine lights?\u003c\/h4\u003e\n\u003cp\u003eProvided downstream O2 sensors and engine fuel trims are operating within factory tolerances, this EPA-compliant converter will clear P0420 catalyst efficiency DTCs.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Truck Durability Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned for full-size sport utility platforms enduring heavy tongue loads and severe 4x4 operating conditions, this unit ensures your exhaust system withstands continuous towing strain while maintaining factory emissions integrity.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67538076762360,"sku":"DS-EA5UQ7YL6","price":180.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-ford-expedition-1997-1998-4-6l-left-1.jpg?v=1790622221","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-ford-expedition-1997-1998-4-6l-left","provider":"Performance Chip Tuning","version":"1.0","type":"link"}