{"product_id":"catalytic-converter-for-mazda-b-series-1998-2000-3-0l-4-0l-rear","title":"Catalytic Converter for Mazda B-Series (1998-2000) 3.0L 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 1998-2000 Mazda B-Series (UN Platform)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The rear catalytic converter restores exhaust scavenging efficiency, neutralizes exhaust gas emissions, and resolves catalytic degradation codes on 1998-2000 Mazda B-Series trucks without requiring custom exhaust fabrication.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mazda B-Series Substrate Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust converters on high-mileage \u003cstrong\u003eUN chassis\u003c\/strong\u003e trucks regularly succumb to thermal shock and internal washcoat attrition. Paired with prolonged operational heat cycles, the factory ceramic cores on the \u003cstrong\u003eVulcan 3.0L\u003c\/strong\u003e and \u003cstrong\u003eCologne 4.0L\u003c\/strong\u003e engines break down and choke off downstream flow. This internal core melting or fragmentation induces restrictive backpressure, spikes cylinder head temperatures, diminishes engine power under load, and illuminates persistent P0420 diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a bolt-in replacement for factory interchange \u003cstrong\u003e23541\u003c\/strong\u003e, this rear converter assembly utilizes high-grade stainless steel outer tubing to withstand corrosion and road brine. Inside, a durable ceramic honeycomb substrate features an optimized washcoat formula to maximize precious metal surface contact, oxidizing hydrocarbons and carbon monoxide without constricting exhaust flow. Laser-cut direct-fit flanges ensure leak-free seal integrity to stock factory downpipes and intermediate exhaust piping.\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;\"\u003e1998-2000 Mazda B-Series\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;\"\u003e3.0L Vulcan \u0026amp; 4.0L Cologne V6 \/ UN Platform\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;\"\u003e150-160 hp \/ 185-225 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;\"\u003e23541\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\u003e1998-2000 Mazda B-Series B3000 (3.0L V6)\u003c\/li\u003e\n  \u003cli\u003e1998-2000 Mazda B-Series B4000 (4.0L V6)\u003c\/li\u003e\n  \u003cli\u003eRear position application only (Does not fit B2500 2.5L L4 models)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the UN Platform B-Series?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1998-2000 Mazda B-Series equipped with the \u003cstrong\u003eVulcan 3.0L\u003c\/strong\u003e or \u003cstrong\u003eCologne 4.0L\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 EPA 46-state compliant and cannot be sold, registered, or shipped to California, New York, Colorado, or Maine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mazda Truck Durability Standard\u003c\/h3\u003e\n\u003cp\u003eWork-ready trucks depend on continuous exhaust flow to maintain pulling power; this stainless converter preserves factory exhaust gas velocity and thermal reliability under sustained towing loads.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67537736007928,"sku":"DS-E4OTLJIF0","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-mazda-b-series-1998-2000-3-0l-4-0l-rear-1.jpg?v=1790616380","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-mazda-b-series-1998-2000-3-0l-4-0l-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}