{"product_id":"catalytic-converter-for-subaru-legacy-2015-2019-2-5l","title":"Catalytic Converter for Subaru Legacy (2015-2019) 2.5L","description":"\u003ch2\u003eEmissions-Compliant Direct-Fit Catalytic Converter for 2015-2019 Subaru Legacy\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit catalytic converter replaces the depleted factory emissions core on the 2015-2019 Subaru Legacy to restore exhaust gas scavenging, eliminate P0420 diagnostic trouble codes, and ensure federal emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Legacy Catalyst Deterioration\u003c\/h3\u003e\n\u003cp\u003eThe factory catalytic converter on the \u003cstrong\u003eBN\u003c\/strong\u003e chassis Legacy frequently suffers from washcoat depletion and substrate clogging over extended mileage. Boxer engine architectures, specifically the horizontally opposed \u003cstrong\u003eFB25\u003c\/strong\u003e, are notorious for passing minute oil vapor through the PCV system into the exhaust stream. Over thermal duty cycles, this oil residue coats the internal ceramic monolith, causing thermal degradation of the active noble metals and elevated exhaust backpressure that hampers engine efficiency and triggers check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct bolt-on solution, this assembly features a heavy-gauge \u003cstrong\u003eStainless Steel\u003c\/strong\u003e outer casing built to withstand severe thermal expansion and road debris. Internally, a high-efficiency \u003cstrong\u003ePlatinum\u003c\/strong\u003e-loaded substrate promotes rapid light-off temperatures to actively convert hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) into harmless inert gases. Heavy-duty, precision-cut flanges eliminate exhaust leaks, while integrated factory-placement O2 sensor ports allow factory air-fuel monitoring sensors to operate without signal bias or post-cat DTC errors.\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;\"\u003e2015-2019 Subaru Legacy\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;\"\u003eFB25 2.5L \/ BN Chassis\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;\"\u003e175 hp \/ 174 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;\"\u003eSBOK01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2015 Subaru Legacy 2.5i (Base, Premium, Limited) 2.5L H4\u003c\/li\u003e\n  \u003cli\u003e2016 Subaru Legacy 2.5i (Base, Premium, Limited) 2.5L H4\u003c\/li\u003e\n  \u003cli\u003e2017 Subaru Legacy 2.5i (Base, Premium, Sport, Limited) 2.5L H4\u003c\/li\u003e\n  \u003cli\u003e2018 Subaru Legacy 2.5i (Base, Premium, Sport, Limited) 2.5L H4\u003c\/li\u003e\n  \u003cli\u003e2019 Subaru Legacy 2.5i (Base, Premium, Sport, Limited) 2.5L H4\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the BN Legacy?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2015-2019 Subaru Legacy equipped with the FB25 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this resolve an existing P0420 catalytic efficiency code?\u003c\/strong\u003e\u003cbr\u003e Yes, replacing a contaminated or failed OEM converter with this fresh substrate assembly restores chemical conversion efficiency and clears active P0420 codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for exact mechanical alignment, this converter matches factory hanger and flange spacing to maintain true boxer engine exhaust balance, crisp throttle response, and quiet OEM-level acoustic profiles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50501750063352,"sku":"DS-E0ONZ5EJH","price":283.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-subaru-legacy-2015-2019-2-5l-1.jpg?v=1789331988","url":"https:\/\/performancechiptuning.com\/products\/catalytic-converter-for-subaru-legacy-2015-2019-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}