{"product_id":"catalytic-converter-for-mazda-b-series-b4000-2007-2009-4-0l-left-right","title":"Catalytic Converter for Mazda B-Series B4000 (2007-2009) 4.0L Left \u0026 Right","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Left \u0026amp; Right Catalytic Converter Set for 2007-2009 Mazda B-Series,B4000 (UN Chassis)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Left \u0026amp; Right Catalytic Converter Set replaces degraded exhaust catalysts on the 2007-2009 Mazda B-Series B4000 to eliminate P0420\/P0430 trouble codes and restore factory exhaust velocity.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mazda B-Series,B4000 Catalyst Deterioration\u003c\/h3\u003e\n\u003cp\u003eUnder repeated thermal cycling, heavy payloads, and towing strain, the factory exhaust catalyst on the \u003cstrong\u003eUN\u003c\/strong\u003e chassis suffers washcoat depletion and thermal matrix degradation. Over time, internal ceramic blocks choke under sustained heat, leading to substrate micro-fractures, exhaust backpressure spikes, and recurring P0420 or P0430 diagnostic codes. Furthermore, aging factory flanges corrode, leading to pre-catalyst exhaust leaks that skew upstream oxygen sensor data.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eBuilt specifically for the \u003cstrong\u003e4.0L Cologne SOHC V6\u003c\/strong\u003e, this dual-bank direct replacement assembly utilizes high-grade stainless steel outer casings paired with heavy-duty ceramic honeycomb substrates. Formulated with a balanced noble-metal washcoat, it delivers rapid catalyst light-off and reliable emissions conversion. Precision-machined, mandrel-bent downpipes match factory routing, while thick mounting flanges and factory-positioned O2 sensor ports allow bolt-on fitment without cutting or custom fabrication.\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;\"\u003e2007-2009 Mazda B-Series,B4000\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\u003e4.0L Cologne SOHC V6\u003c\/strong\u003e \/ \u003cstrong\u003eUN\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;\"\u003e207 hp \/ 238 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\n\u003cstrong\u003e52596\u003c\/strong\u003e, \u003cstrong\u003e70401\u003c\/strong\u003e\n\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\u003e2007 Mazda B-Series B4000 4.0L V6 Left \u0026amp; Right\u003c\/li\u003e\n  \u003cli\u003e2008 Mazda B-Series B4000 4.0L V6 Left \u0026amp; Right\u003c\/li\u003e\n  \u003cli\u003e2009 Mazda B-Series B4000 4.0L V6 Left \u0026amp; Right\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the UN B-Series,B4000?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2007-2009 Mazda B-Series,B4000 equipped with the \u003cstrong\u003e4.0L Cologne SOHC V6\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eIs this catalytic converter legal for road use in California or New York?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit is 46-state EPA compliant and cannot be sold or registered in California, New York, Colorado, or Maine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mazda Truck Durability Standard\u003c\/h3\u003e\n\u003cp\u003eMid-size truck platforms require exhaust components capable of withstanding rough washboard trails, heavy towing loads, and off-road chassis flex. This converter assembly provides the structural resilience and high-temp corrosion resistance necessary for long-term utility.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67537814880504,"sku":"DS-EAPTS6T66","price":213.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-mazda-b-series-b4000-2007-2009-4-0l-left-right-1.jpg?v=1790617760","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-mazda-b-series-b4000-2007-2009-4-0l-left-right","provider":"Performance Chip Tuning","version":"1.0","type":"link"}