{"product_id":"catalytic-converter-for-pontiac-bonneville-1997-2005-3-8l","title":"Catalytic Converter for Pontiac Bonneville (1997-2005) 3.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Stainless Catalytic Converter for 1997-2005 Pontiac Bonneville (H-Body \/ G-Body)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct-fit underbody catalytic converter replaces the factory unit on 1997-2005 Pontiac Bonneville \u003cstrong\u003eH-Body \/ G-Body\u003c\/strong\u003e models equipped with the \u003cstrong\u003e3.8L V6\u003c\/strong\u003e engine to restore OBD-II emissions conversion and eliminate exhaust restriction.\u003c\/p\u003e\u003ch3\u003eThe Stock Pontiac Bonneville Catalytic Converter Failure\u003c\/h3\u003e\u003cp\u003eOver high mileage on the \u003cstrong\u003eH-Body \/ G-Body\u003c\/strong\u003e platform, severe thermal cycling and unburned fuel from aging ignition components cause the factory ceramic substrate inside the \u003cstrong\u003eL36 \/ L67 3.8L V6\u003c\/strong\u003e converter to fracture and melt. Once the precious-metal washcoat degrades or internal material breaks loose, exhaust flow stalls and downstream oxygen sensor readings mirror upstream data. This drop in oxygen storage capacity triggers persistent \u003cstrong\u003eP0420\u003c\/strong\u003e fault codes while creating excessive backpressure under load.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Catalytic Converter\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Illuminated MIL storing \u003cstrong\u003eP0420\u003c\/strong\u003e or \u003cstrong\u003eP0430\u003c\/strong\u003e catalyst efficiency below threshold codes in the PCM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Substrate Rattle:\u003c\/strong\u003e Audible metallic rattling beneath the floorpan at idle or deceleration caused by a fractured ceramic core.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Backpressure \u0026amp; Emissions Failure:\u003c\/strong\u003e Sluggish throttle response, elevated underbody heat, and failed OBD-II readiness or emissions inspections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Stainless Exhaust Solution\u003c\/h3\u003e\u003cp\u003eEngineered as a bolt-on OEM replacement, this converter pairs a corrosion-resistant stainless steel body (\u003cstrong\u003e8 in\u003c\/strong\u003e length, \u003cstrong\u003e5 in\u003c\/strong\u003e height) with factory-positioned front flange and rear clamp geometry for zero cutting or welding. Inside, a ceramic honeycomb substrate treated with a precious-metal washcoat converts HC, CO, and NOx emissions to meet \u003cstrong\u003eEPA Federal\u003c\/strong\u003e requirements. A precision-welded post-catalyst \u003cstrong\u003eO2 sensor port\u003c\/strong\u003e ensures accurate downstream monitoring for leak-free \u003cstrong\u003eOBD-II\u003c\/strong\u003e compliance.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 x Direct-Fit Catalytic Converter\u003c\/li\u003e\n\u003cli\u003e1 x Front Flange Gasket\u003c\/li\u003e\n\u003cli\u003e1 x Rear U-Bolt Clamp\u003c\/li\u003e\n\u003cli\u003eMounting Bolts, Nuts, and Washers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\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;\"\u003e1997-2005 Pontiac Bonneville\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;\"\u003eL36 \/ L67 3.8L V6 \/ H-Body \u0026amp; 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;\"\u003eEmissions \u0026amp; Substrate\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eEPA Federal (46-State Legal) \/ Ceramic Honeycomb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Bolt-On OEM Replacement (No Cutting or Welding)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMake: Pontiac\u003c\/li\u003e\n\u003cli\u003eModel: Pontiac Bonneville 3.8L (SE, SLE, SSE, SSEi)\u003c\/li\u003e\n\u003cli\u003eYears: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005\u003c\/li\u003e\n\u003cli\u003eEngine: 3.8L V6 (Naturally Aspirated \u0026amp; Supercharged)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the H-Body \/ G-Body Bonneville?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 1997-2005 Pontiac Bonneville equipped with the \u003cstrong\u003eL36 \/ L67 3.8L V6\u003c\/strong\u003e engine, including the supercharged SSEi. \u003cstrong\u003eNot compatible with 4.6L V8 GXP models. This EPA federal unit is not CARB approved and is not legal for vehicles registered in California, New York, Colorado, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0420\/P0430 codes, and are O2 sensors included?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, it restores catalyst efficiency when the factory converter has failed, though oxygen sensors are not included.\u003c\/strong\u003e Transfer your existing post-catalyst O2 sensor or install a new unit, and inspect for upstream exhaust leaks that can trigger false \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes.\u003c\/p\u003e\u003ch4\u003eAre gaskets and mounting hardware included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e The package includes the flange gasket, U-bolt clamp, and bolts, nuts, and washers; soak seized OEM fasteners with penetrating oil once the exhaust is cool and torque all joints evenly.\u003c\/p\u003e\u003ch3\u003eThe Pontiac Precision Standard\u003c\/h3\u003e\u003cp\u003eBuilt to maintain strict \u003cstrong\u003eOBD-II\u003c\/strong\u003e readiness and quiet underbody operation, this stainless converter restores factory exhaust flow across both naturally aspirated and supercharged 3800 drivetrains. Compare against your original unit prior to installation to confirm exact flange alignment and CEL-free emissions performance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68090073743608,"sku":"DS-E9FESOU37","price":404.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-pontiac-bonneville-1997-2005-3-8l-1.jpg?v=1794586016","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-pontiac-bonneville-1997-2005-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}