{"product_id":"catalytic-converter-for-infiniti-q40-2015-3-7l-left-right","title":"Catalytic Converter for Infiniti Q40 (2015) 3.7L Left \u0026 Right","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Catalytic Converter Pair for Infiniti Q40 (V36)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit Left and Right Catalytic Converter set replaces degraded factory converters on the Infiniti Q40 to eliminate P0420\/P0430 DTCs, restore exhaust scavenging efficiency, and ensure federal emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Infiniti Q40 Catalytic Breakdown\u003c\/h3\u003e\n\u003cp\u003eFactory catalytic substrate blocks inside the \u003cstrong\u003eV36\u003c\/strong\u003e exhaust system face aggressive degradation over extended heat cycles. In the high-revving \u003cstrong\u003eVQ37VHR\u003c\/strong\u003e 3.7L engine, exhaust gas temperatures frequently cause washcoat sintering, internal ceramic core breakdown, and cell fracturing. Over time, restricted internal passages trigger catalyst inefficiency codes (P0420 and P0430), choke high-RPM scavenging dynamics, and sap power from the factory 328-horsepower curve.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as an exact bolt-on assembly, this converter set uses durable stainless steel outer shells paired with high-efficiency ceramic honeycomb monoliths loaded with active noble metal washcoats. Mandrel-formed profiles and thick, laser-cut mounting flanges match factory manifold studs and intermediate y-pipe hookups precisely, requiring no cutting or custom fabrication. Factory-positioned oxygen sensor bungs keep O2 sensors at the correct depth for accurate lambda closed-loop tuning while lowering backpressure across the entire rev range.\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;\"\u003e2015 Infiniti Q40\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;\"\u003eVQ37VHR \/ V36\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;\"\u003e328 hp \/ 269 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;\"\u003e15H5485, 15H5484, 16197, 16198\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\u003e2015 Infiniti Q40 Base Sedan 4-Door 3.7L 3696CC V6 GAS DOHC Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e2015 Infiniti Q40 AWD Sedan 4-Door 3.7L 3696CC V6 GAS DOHC Naturally Aspirated\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the V36 Q40?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2015 Infiniti Q40 equipped with the VQ37VHR engine.\u003c\/p\u003e\n\n\u003ch4\u003eWill this pair resolve catalyst efficiency check engine lights?\u003c\/h4\u003e\n\u003cp\u003eYes, replacing deteriorated factory units with this active ceramic pair restores emissions reduction capacity and turns off P0420\/P0430 trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Infiniti Performance Standard\u003c\/h3\u003e\n\u003cp\u003eThe V36 sports sedan platform relies on balanced exhaust velocity to generate immediate throttle response and signature VQ acoustics without rasp or cabin drone.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67537674469624,"sku":"DS-EEV42Q937","price":181.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-infiniti-q40-2015-3-7l-left-right-1.jpg?v=1790613713","url":"https:\/\/performancechiptuning.com\/es\/products\/catalytic-converter-for-infiniti-q40-2015-3-7l-left-right","provider":"Performance Chip Tuning","version":"1.0","type":"link"}