{"product_id":"catalytic-converter-for-nissan-altima-2007-2008-3-5l","title":"Catalytic Converter for Nissan Altima (2007-2008) 3.5L","description":"\u003ch2\u003eDirect-Fit Replacement Catalytic Converter for 2007-2008 Nissan Altima\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The catalytic converter replaces degraded factory emissions assemblies on the 2007-2008 Altima to normalize exhaust scavenging, reduce tailpipe emissions, and eliminate catalyst efficiency trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan Altima Catalyst Substrate Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust units on the fourth-generation \u003cstrong\u003eL32\u003c\/strong\u003e Altima endure relentless thermal cycling and high exhaust gas temperatures from the high-displacement V6. Over time, the internal ceramic honeycomb substrate experiences sintering, cell fracture, and catalytic washcoat deactivation. This structural breakdown increases exhaust backpressure, chokes volumetric efficiency at higher RPMs, and triggers persistent P0420\/P0430 diagnostic trouble codes as downstream oxygen sensors detect sub-threshold conversion efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to restore factory exhaust velocity and emissions compliance, this direct-replacement assembly features a high-grade stainless steel outer shell designed to withstand road salt, thermal expansion, and mechanical vibration. Inside, a durable, high-flow ceramic substrate is treated with a resilient precious-metal washcoat optimized for hydrocarbon and NOx reduction without creating parasitic exhaust backpressure. Precision-machined, thick-gauge mounting flanges ensure leak-free mating to existing manifold and intermediate pipe joints, eliminating exhaust blow-by. Supplied with new gaskets and mounting hardware, it restores proper sensor feedback to the engine control unit without requiring custom cutting or welding.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e2007-2008 Nissan Altima 3.5L\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\u003eVQ35DE\u003c\/strong\u003e \/ \u003cstrong\u003eL32\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;\"\u003e270 hp \/ 258 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\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007 Nissan Altima 3.5 SE Sedan \/ Coupe (3.5L V6 \u003cstrong\u003eVQ35DE\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e2007 Nissan Altima 3.5 SL Sedan (3.5L V6 \u003cstrong\u003eVQ35DE\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e2008 Nissan Altima 3.5 SE Sedan \/ Coupe (3.5L V6 \u003cstrong\u003eVQ35DE\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e2008 Nissan Altima 3.5 SL Sedan (3.5L V6 \u003cstrong\u003eVQ35DE\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the L32 Altima?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2007-2008 Nissan Altima equipped with the \u003cstrong\u003eVQ35DE\u003c\/strong\u003e 3.5L engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this resolve a P0420 or P0430 diagnostic trouble code?\u003c\/strong\u003e\u003cbr\u003e Yes, assuming no upstream engine misfires or exhaust leaks exist, this fresh substrate restores proper catalytic reduction to clear catalyst efficiency codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan Powertrain Standard\u003c\/h3\u003e\n\u003cp\u003eThe high-revving \u003cstrong\u003eVQ35DE\u003c\/strong\u003e platform demands uncompromised exhaust flow to maintain its aggressive mid-range torque curve and signature exhaust tone. Installing an unrestrictive, direct-fit replacement converter ensures optimal backpressure control and emissions compliance without sacrificing mechanical responsiveness.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50501699797240,"sku":"DS-E6ES5G56U","price":187.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-nissan-altima-2007-2008-3-5l-1.jpg?v=1789329775","url":"https:\/\/performancechiptuning.com\/products\/catalytic-converter-for-nissan-altima-2007-2008-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}