{"product_id":"catalytic-converter-for-nissan-sentra-2002-2006-2-5l","title":"Catalytic Converter for Nissan Sentra (2002-2006) 2.5L","description":"\u003ch2\u003eDirect-Fit Catalytic Converter Exhaust Manifold for 2002-2006 Nissan Sentra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit catalytic converter replaces the failure-prone factory manifold assembly on the 2002-2006 Nissan Sentra to restore proper exhaust scavenging, eliminate catalyst breakdown risk, and maintain factory emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan Sentra Pre-Catalyst Substrate Breakdown\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust manifolds on the \u003cstrong\u003eB15\u003c\/strong\u003e chassis housing the \u003cstrong\u003eQR25DE\u003c\/strong\u003e engine suffer from a widely documented mechanical failure: severe pre-catalyst degradation. Due to close-coupled manifold placement and valve overlap under deceleration, exhaust pulses draw deteriorating ceramic substrate dust back through the exhaust ports into the combustion chambers. This abrasive particulate rapidly scores cylinder walls, destroys piston rings, induces catastrophic oil consumption, and triggers persistent P0420 diagnostic trouble codes from structural honeycomb collapse.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement manifold assembly resolves substrate failure through robust, heat-resistant steel tubular construction and an upgraded thermal-shock-resistant ceramic substrate. Engineered to drop directly into the \u003cstrong\u003eB15\u003c\/strong\u003e engine bay, it retains stock oxygen sensor bung locations and factory flange geometry without cutting or welding. The optimized internal cell density ensures rapid light-off temperatures and precise flow dynamics, restoring backpressure balance to factory parameters while safeguarding cylinder health against particulate back-siphonage.\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;\"\u003e2002-2006 Nissan Sentra\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\u003eQR25DE\u003c\/strong\u003e (2.5L I4) \/ \u003cstrong\u003eB15\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;\"\u003e165-175 hp \/ 175-180 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\u003cstrong\u003e33134\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2002-2006 Nissan Sentra SE-R 2.5L 4-Cylinder\u003c\/li\u003e\n  \u003cli\u003e2002-2006 Nissan Sentra SE-R Spec V 2.5L 4-Cylinder\u003c\/li\u003e\n  \u003cli\u003e2003-2006 Nissan Sentra Limited Edition \/ 2.5S 2.5L 4-Cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the B15 Sentra?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2002-2006 Nissan Sentra equipped with the \u003cstrong\u003eQR25DE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this direct replacement clear my P0420 catalytic converter code?\u003c\/strong\u003e\u003cbr\u003e Yes, providing downstream O2 sensors and fuel trim parameters are within factory tolerance, this fresh substrate restores emissions conversion efficiency to clear catalyst-related trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan JDM Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle high-revving pulses without sacrificing backpressure balance, this manifold restores the spirited throttle response and smooth acoustic profile expected from the \u003cstrong\u003eQR25DE\u003c\/strong\u003e platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50501630165240,"sku":"DS-EUICMCECK","price":165.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-nissan-sentra-2002-2006-2-5l-1.jpg?v=1789329083","url":"https:\/\/performancechiptuning.com\/es\/products\/catalytic-converter-for-nissan-sentra-2002-2006-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}