{"product_id":"catback-exhaust-for-nissan-sentra-2002-2006-2-5l","title":"Catback Exhaust for Nissan Sentra (2002-2006) 2.5L","description":"\u003ch2\u003eHigh-Flow Catback Exhaust for 2002-2006 Nissan Sentra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Catback Exhaust replaces the restrictive factory exhaust system on the 2002-2006 Sentra to reduce exhaust backpressure, optimize pulse scavenging, and improve high-RPM airflow.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan Sentra Exhaust Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFrom the factory, the \u003cstrong\u003eB15\u003c\/strong\u003e chassis Sentra is equipped with an aluminized mild steel exhaust network prone to structural degradation, weld fatigue, and rust-through along flange mating surfaces. Internally, the OEM system relies on narrow, press-bent tubing that crimps flow at critical radiuses, coupled with a heavily baffled chambered muffler. On the high-displacement 2.5L \u003cstrong\u003eQR25DE\u003c\/strong\u003e inline-four, this creates high exhaust gas backpressure, traps thermal load downstream of the manifold, and chokes mid-to-high RPM volumetric efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eFabricated entirely from premium \u003cstrong\u003eT-304 stainless steel\u003c\/strong\u003e, this direct bolt-on cat-back architecture optimizes exhaust gas velocity and scavenging dynamics. Smooth mandrel bends eliminate flow disruptions, maintaining constant internal diameter throughout the routing. The system features a low-restriction straight-through core muffler designed to attenuate harsh droning frequencies while letting the engine breathe freely under load. Pre-welded OE-location exhaust hangers, robotic TIG welds, and rigid connection flanges guarantee structural stability under chassis flex, mating cleanly with the catalytic converter without cutting or modification.\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 \/ \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;\"\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\u003e2002-2006 Nissan Sentra SE-R (2.5L L4 QR25DE)\u003c\/li\u003e\n  \u003cli\u003e2002-2006 Nissan Sentra SE-R Spec V (2.5L L4 QR25DE)\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 cat-back trigger a Check Engine Light (CEL)?\u003c\/strong\u003e\u003cbr\u003e No, because this system bolts downstream of the factory catalytic converter and O2 sensor monitoring points, it will not trigger an emissions-related trouble code.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan Sport Compact Caliber\u003c\/h3\u003e\n\u003cp\u003eDesigned for the performance demands of the \u003cstrong\u003eB15\u003c\/strong\u003e platform, this exhaust produces an aggressive, deep mechanical tone while providing the flow capacity necessary to extract maximum torque and power from your naturally aspirated or modified build.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50512344187128,"sku":"DS-ET9K71YML","price":183.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catback-exhaust-for-nissan-sentra-2002-2006-2-5l-1.jpg?v=1789425736","url":"https:\/\/performancechiptuning.com\/es\/products\/catback-exhaust-for-nissan-sentra-2002-2006-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}