{"product_id":"catalytic-converter-for-buick-park-avenue-2000-2005-3-8l","title":"Catalytic Converter for Buick Park Avenue (2000-2005) 3.8L","description":"\u003ch2\u003eDirect-Fit Catalytic Converter for 2000-2005 Buick Park Avenue\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit catalytic converter replaces degraded factory emissions units on the 2000-2005 Buick Park Avenue to restore exhaust velocity, lower backpressure, and eliminate catalytic efficiency trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Buick Park Avenue Catalyst Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory catalytic assemblies on high-mileage \u003cstrong\u003eG-Body\u003c\/strong\u003e chassis suffer from washcoat erosion, thermal shock, and carbon poisoning from unburned hydrocarbons common to aging \u003cstrong\u003e3800 Series II\u003c\/strong\u003e V6 engines. Over time, internal ceramic monoliths deteriorate, causing fractured cell structures, physical blockages, and excessive exhaust backpressure. This bottleneck chokes scavenging, elevates cylinder head temperatures, robs low-end torque, and inevitably triggers persistent diagnostic trouble codes like P0420.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct replacement catalytic assembly features a heavy-gauge 409 stainless steel housing designed to resist road salt corrosion and thermal fatigue. Inside, a high-flow ceramic honeycomb substrate is coated with an optimized precious metal washcoat to efficiently oxidize carbon monoxide and unburnt hydrocarbons while reducing NOx emissions. Precision-welded flanges and integrated oxygen sensor bungs align directly with factory hangers and manifolds, ensuring an airtight seal without cutting, welding, or custom pipe bending.\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;\"\u003e2000-2005 Buick Park Avenue\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;\"\u003e3800 Series II (L36 \/ L67) \/ G-Body\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;\"\u003e205 hp \/ 230 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\u003e2000 Buick Park Avenue 3.8L V6 Base \u0026amp; Ultra\u003c\/li\u003e\n  \u003cli\u003e2001 Buick Park Avenue 3.8L V6 Base \u0026amp; Ultra\u003c\/li\u003e\n  \u003cli\u003e2002 Buick Park Avenue 3.8L V6 Base \u0026amp; Ultra\u003c\/li\u003e\n  \u003cli\u003e2003 Buick Park Avenue 3.8L V6 Base \u0026amp; Ultra\u003c\/li\u003e\n  \u003cli\u003e2004 Buick Park Avenue 3.8L V6 Base \u0026amp; Ultra\u003c\/li\u003e\n  \u003cli\u003e2005 Buick Park Avenue 3.8L V6 Base \u0026amp; Ultra\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the G-Body Park Avenue?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2000-2005 Buick Park Avenue equipped with the 3800 Series II engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this converter clear a recurring P0420 diagnostic trouble code?\u003c\/strong\u003e\u003cbr\u003e Provided upstream fuel trim and oxygen sensors operate properly, this unit restores OEM conversion efficiency to extinguish catalyst readiness trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Buick Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to match the smooth, continuous power delivery expected from full-size American cruisers, this catalytic unit provides durable emissions compliance and leak-free reliability across thousands of highway miles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50501640880376,"sku":"DS-EJRNNHB6L","price":167.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-buick-park-avenue-2000-2005-3-8l-1.jpg?v=1789329147","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-buick-park-avenue-2000-2005-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}