{"product_id":"catalytic-converter-for-infiniti-fx35-2003-2008-3-5l","title":"Catalytic Converter for Infiniti FX35 (2003-2008) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Stainless Catalytic Converter Pair for 2003-2008 Infiniti FX35 (S50)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct-fit catalytic converter pair bolts onto the 2003-2008 Infiniti FX35 (\u003cstrong\u003eS50\u003c\/strong\u003e) \u003cstrong\u003eVQ35DE\u003c\/strong\u003e 3.5L V6 to restore exhaust emissions scrubbing and eliminate catalyst efficiency codes.\u003c\/p\u003e\u003ch3\u003eThe Stock Infiniti FX35 Catalytic Converter Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eS50\u003c\/strong\u003e chassis with the \u003cstrong\u003eVQ35DE\u003c\/strong\u003e 3.5L V6, dual factory converters sit close to the exhaust manifolds and endure severe thermal cycling. Repeated heat soak, age-related oil consumption, or ignition misfires degrade the precious-metal washcoat and fracture the ceramic monolith. As oxygen storage drops, downstream sensors trigger \u003cstrong\u003eP0420\u003c\/strong\u003e or \u003cstrong\u003eP0430\u003c\/strong\u003e codes while detached core chunks rattle inside the housing and restrict exhaust scavenging.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Catalytic Converter\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e \u003cstrong\u003eP0420\u003c\/strong\u003e or \u003cstrong\u003eP0430\u003c\/strong\u003e codes triggered when rear O2 sensor readings mirror upstream exhaust flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate Rattle:\u003c\/strong\u003e Metallic clattering under the floorpan caused by a fractured ceramic core inside the converter shell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackpressure \u0026amp; Emissions Failure:\u003c\/strong\u003e Sluggish throttle response, sulfur odor, and failed OBD-II readiness or smog checks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Stainless Catalytic Converter Solution\u003c\/h3\u003e\u003cp\u003eReplacing both banks with this 2-piece stainless assembly restores balanced flow on the \u003cstrong\u003eVQ35DE\u003c\/strong\u003e V6 without cutting or welding. Each converter pipe uses an 8-inch by 5-inch corrosion-resistant housing containing a dual-stage ceramic honeycomb substrate coated in precious metals to convert HC, CO, and NOx. Precision-welded factory flanges and integrated post-catalyst O2 sensor bungs ensure OE bolt-on geometry and leak-free sealing.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 x Catalytic Converter Pipes (Pair)\u003c\/li\u003e\n\u003cli\u003e2 x 2-Bolt Flange Gaskets\u003c\/li\u003e\n\u003cli\u003e2 x Ring Gaskets\u003c\/li\u003e\n\u003cli\u003eBolts, Nuts, and Washers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\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;\"\u003e2003-2008 Infiniti FX35\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;\"\u003eVQ35DE 3.5L V6 \/ S50\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;\"\u003eEmissions \u0026amp; Substrate\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEPA Federal (46-State Legal) \/ Ceramic Honeycomb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Bolt-On OEM Replacement (No Cutting or Welding)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2003 Infiniti FX35 (3.5L V6)\u003c\/li\u003e\n\u003cli\u003e2004 Infiniti FX35 (3.5L V6)\u003c\/li\u003e\n\u003cli\u003e2005 Infiniti FX35 (3.5L V6)\u003c\/li\u003e\n\u003cli\u003e2006 Infiniti FX35 (3.5L V6)\u003c\/li\u003e\n\u003cli\u003e2007 Infiniti FX35 (3.5L V6)\u003c\/li\u003e\n\u003cli\u003e2008 Infiniti FX35 (3.5L V6)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the S50 FX35?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 2003-2008 Infiniti FX35 equipped with the \u003cstrong\u003eVQ35DE\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes the FX45 4.5L V8, 2009+ FX35, and vehicles registered in CA, NY, CO, or ME (EPA Federal, not CARB approved).\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0420\/P0430 codes, and are O2 sensors included?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when caused by worn converters; O2 sensors are not included.\u003c\/strong\u003e Transfer functional sensors or install new units into the post-cat ports, and check for exhaust leaks before clearing \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eAre gaskets and hardware included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Both flange gaskets, ring gaskets, bolts, nuts, and washers are included; soak old studs with penetrating oil and torque fasteners evenly on a cool exhaust.\u003c\/p\u003e\u003ch3\u003eThe Infiniti Performance Standard\u003c\/h3\u003e\u003cp\u003eEngineered for the \u003cstrong\u003eS50\u003c\/strong\u003e platform, this dual-pipe set restores smooth scavenging and crisp throttle response on the \u003cstrong\u003eVQ35DE\u003c\/strong\u003e V6 while keeping your OBD-II monitors ready.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68085268709624,"sku":"DS-EL9BBVY48","price":334.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-infiniti-fx35-2003-2008-3-5l-1.jpg?v=1794543179","url":"https:\/\/performancechiptuning.com\/products\/catalytic-converter-for-infiniti-fx35-2003-2008-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}