{"product_id":"catalytic-converter-for-subaru-baja-2003-2006-2-5l-front-rear","title":"Catalytic Converter for Subaru Baja (2003-2006) 2.5L Front\/Rear","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Replacement Catalytic Converter for 2003-2006 Subaru Baja (BT)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The catalytic converter assembly replaces degraded factory emissions components on the 2003-2006 Subaru Baja to restore proper exhaust velocity, eliminate catalyst efficiency DTCs, and maintain emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Baja Catalyst Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory catalytic converters on the naturally aspirated \u003cstrong\u003eBT\u003c\/strong\u003e chassis Baja suffer severe thermal and mechanical fatigue over extended operational cycles. Due to the low-slung header layout of the horizontal \u003cstrong\u003eEJ251\u003c\/strong\u003e and \u003cstrong\u003eEJ253\u003c\/strong\u003e Boxer engines, the OEM ceramic washcoat frequently degrades from oil blow-by and unburnt fuel carryover common to high-mileage flat-four engines. Over time, internal cell attrition causes substrate crumbling, internal blockages, increased exhaust backpressure, elevated cylinder head temperatures, and recurrent P0420 catalytic efficiency diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement converter assembly is engineered with a high-flow, heat-resistant ceramic substrate engineered to optimize precious metal washcoat distribution, expediting light-off temperatures and eliminating tailpipe hydrocarbon spikes. The outer casing is fabricated from heavy-gauge stainless steel to resist road debris impact, salt corrosion, and thermal cycling shock. Precision-machined, thick-gauge flanges ensure a leak-free seal directly to the factory manifold and mid-pipe flanges, while pre-threaded oxygen sensor bungs maintain factory \u003cstrong\u003eEJ25\u003c\/strong\u003e downstream sensor orientation to eliminate Check Engine Light errors without custom fabrication.\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: solid font-size: min-width:\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;\"\u003e2003-2006 Subaru Baja\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;\"\u003eEJ251 \/ EJ253 \/ BT\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 hp \/ 166 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;\"\u003eQS414752QR\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\u003e2003 Subaru Baja Base \/ Sport 2.5L H4 Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e2004 Subaru Baja Sport 2.5L H4 Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e2005 Subaru Baja Sport 2.5L H4 Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e2006 Subaru Baja Sport 2.5L H4 Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003eNote: Excludes 2.5L Turbo (EJ255) models; 48-state emissions compliant (cannot ship to CA or NY).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the BT Baja?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2006 Subaru Baja equipped with the naturally aspirated \u003cstrong\u003eEJ251\u003c\/strong\u003e or \u003cstrong\u003eEJ253\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eWill this direct-fit assembly resolve a P0420 catalyst efficiency code?\u003c\/h4\u003e\n\u003cp\u003eYes, it restores factory emissions scrubbing efficiency to clear catalytic degradation codes assuming oxygen sensors and engine air-fuel mixtures operate within spec.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Utility Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle harsh trails and daily bed hauling, this exhaust assembly delivers OEM-spec structural integrity and exhaust flow restoration tailored for demanding AWD utilitarian applications.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67543935418616,"sku":"DS-EWVKLZOCN","price":142.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-subaru-baja-2003-2006-2-5l-front-rear-1.jpg?v=1790695979","url":"https:\/\/performancechiptuning.com\/es\/products\/catalytic-converter-for-subaru-baja-2003-2006-2-5l-front-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}