{"product_id":"catalytic-converter-for-buick-regal-1997-2004-3-8l","title":"Catalytic Converter for Buick Regal (1997-2004) 3.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Replacement Catalytic Converter for 1997-2004 Buick Regal (W-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The catalytic converter assembly replaces degraded or clogged exhaust emissions equipment on the 1997-2004 Buick Regal to restore optimal exhaust gas velocity, clear catalyst efficiency trouble codes, and reduce tailpipe emissions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Buick Regal Exhaust Restriction and Flex Failure\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust units on the fourth-generation \u003cstrong\u003eW-Body\u003c\/strong\u003e platform suffer severe structural degradation over extended heat cycles. The original front flex joint frequently frays, fatigue-cracks, and introduces unmetered exhaust leaks prior to the catalytic substrate, skewing downstream O2 sensor readouts and triggering persistent P0420 diagnostic trouble codes. Concurrently, high-mileage \u003cstrong\u003e3800 Series II\u003c\/strong\u003e V6 engines often subject the OEM ceramic washcoat to unburnt hydrocarbons and thermal shock, causing catalytic core breakdown, interior sintering, excessive exhaust backpressure, and diminished top-end engine efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct bolt-on replacement, this complete converter assembly utilizes a heavy-gauge \u003cstrong\u003eStainless Steel\u003c\/strong\u003e outer canister engineered to withstand severe road-salt exposure and thermal cycling. Featuring an integrated, multi-ply stainless steel flex section, it absorbs transverse powertrain rocking under heavy torque loads to eliminate stress cracking at the manifold mating flange. Inside, a high-efficiency \u003cstrong\u003eCeramic substrate\u003c\/strong\u003e loaded with precious-metal catalyst washcoat maximizes surface area contact to effectively oxidize hydrocarbons and carbon monoxide into non-hazardous emissions without restricting exhaust scavenger dynamics.\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: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\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;\"\u003e1997-2004 Buick Regal\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;\"\u003e3.8L V6 (L36 \/ L67 3800 Series II) \/ W-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;\"\u003e200 hp \/ 225 lb-ft (Naturally Aspirated L36)\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;\"\u003e54627, 3022002, OPCH9017, 16567, 642583, 50321, 46567, QS546176QR\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\u003e1997-2004 Buick Regal LS 3.8L V6 (3800 Series II)\u003c\/li\u003e\n  \u003cli\u003e1997-2004 Buick Regal GS 3.8L V6 (3800 Series II)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the W-Body Regal?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1997-2004 Buick Regal equipped with the \u003cstrong\u003e3800 Series II\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eIs this catalytic converter legal for road use in CARB-regulated states?\u003c\/h4\u003e\n\u003cp\u003eThis unit is EPA-compliant and 46-state legal, but it cannot be legally installed or registered in California, New York, Colorado, or Maine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Buick Reliability Caliber\u003c\/h3\u003e\n\u003cp\u003ePreserve your vehicle's classic American muscle-car torque curve and smooth highway cruising dynamics with precision-fabricated exhaust hardware built to withstand harsh daily driving cycles without exhaust rasp or backpressure losses.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67543933747448,"sku":"DS-ED869809D","price":126.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-buick-regal-1997-2004-3-8l-2.jpg?v=1790695840","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-buick-regal-1997-2004-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}