{"product_id":"catalytic-converter-for-mercury-monterey-2004-2007-4-2l-rear","title":"Catalytic Converter for Mercury Monterey (2004-2007) 4.2L Rear","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Rear Catalytic Converter for 2004-2007 Mercury Monterey (V126)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Direct-Fit Rear Catalytic Converter replaces the failed factory downstream emissions unit on the 2004-2007 Mercury Monterey to eliminate P0420\/P0430 fault codes and restore balanced exhaust scavenging.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercury Monterey Catalyst Degradation\u003c\/h3\u003e\n\u003cp\u003eOver extended mileage, factory converters on the \u003cstrong\u003e4.2L Essex V6\u003c\/strong\u003e experience ceramic substrate washcoat sintering and carbon fouling from normal combustion byproduct carryover. Thermal cycling fractures the internal core, while restricted flow raises backpressure, elevates cylinder head temperatures, and diminishes fuel economy while triggering persistent check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to resolve emissions DTCs and thermal stress, this rear converter features a high-grade 409 stainless steel housing designed to resist road salt oxidation and structural fatigue. Inside, a high-porosity ceramic honeycomb substrate is coated with an EPA-compliant precious metal washcoat (Platinum, Palladium, and Rhodium) ensuring optimal gas conversion. Precision-machined, laser-cut mounting flanges and welded factory-location oxygen sensor bungs guarantee an airtight, bolt-on replacement without cutting or custom pipe adaptation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Rear Direct-Fit Catalytic Converter assembly\u003c\/li\u003e\n\u003c\/ul\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;\"\u003e2004-2007 Mercury Monterey\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;\"\u003e4.2L Essex V6 \/ V126\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;\"\u003e201 hp \/ 263 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;\"\u003eN\/A\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\u003e2004 Mercury Monterey 4.2L V6 (Rear Position)\u003c\/li\u003e\n  \u003cli\u003e2005 Mercury Monterey 4.2L V6 (Rear Position)\u003c\/li\u003e\n  \u003cli\u003e2006 Mercury Monterey 4.2L V6 (Rear Position)\u003c\/li\u003e\n  \u003cli\u003e2007 Mercury Monterey 4.2L V6 (Rear Position)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the V126 Monterey?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2004-2007 Mercury Monterey equipped with the \u003cstrong\u003e4.2L Essex V6\u003c\/strong\u003e engine. \u003cstrong\u003eEPA 49-state compliant only; not legal for sale, installation, or use on licensed vehicles in California, Colorado, Maine, or New York.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eWill this clear catalyst efficiency DTC codes?\u003c\/h4\u003e\n\u003cp\u003eYes, replacing a clogged or deteriorated factory core with this EPA-calibrated precious-metal washcoat restores proper oxygen storage capacity to extinguish active catalyst threshold codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercury Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle heavy passenger van payloads and continuous highway heat, this structural stainless assembly delivers OE-grade acoustic dampening, reliable exhaust flow, and hassle-free emissions compliance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67916077859064,"sku":"DS-EC3L4HPBJ","price":396.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-mercury-monterey-2004-2007-4-2l-rear-1.jpg?v=1793472530","url":"https:\/\/performancechiptuning.com\/products\/catalytic-converter-for-mercury-monterey-2004-2007-4-2l-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}