{"product_id":"exhaust-system-with-catalytic-converter-for-toyota-sienna-2004-2006-3-3l","title":"Exhaust System with Catalytic Converter for Toyota Sienna (2004-2006) 3.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003e409 Stainless Direct-Fit Exhaust System with Catalytic Converters for 2004-2006 Toyota Sienna (XL20)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This complete manifold-to-tailpipe exhaust and catalytic converter system restores OEM emissions compliance, exhaust sealing, and quiet flow routing on front-wheel-drive 2004-2006 Toyota Sienna \u003cstrong\u003eXL20\u003c\/strong\u003e minivans equipped with the \u003cstrong\u003e3MZ-FE 3.3L V6\u003c\/strong\u003e engine.\u003c\/p\u003e\u003ch3\u003eThe Stock Toyota Sienna Exhaust \u0026amp; Converter Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eXL20\u003c\/strong\u003e chassis powered by the \u003cstrong\u003e3MZ-FE 3.3L V6\u003c\/strong\u003e, thermal cycling and moisture accumulation degrade the factory manifold converters, intermediate converter, resonator, and rear muffler simultaneously. Internal ceramic substrate fracture and washcoat depletion reduce oxygen storage capacity, triggering \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e catalyst efficiency faults. Meanwhile, thin factory mild-steel flanges and flex joints corrode through, creating exhaust leaks, sulfur odors, metallic rattles, and restricted flow across OEM assemblies \u003cstrong\u003e16392\u003c\/strong\u003e, \u003cstrong\u003e16393\u003c\/strong\u003e, and \u003cstrong\u003e54614\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Exhaust System\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Stored \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e catalyst efficiency codes caused by thermally degraded converter substrates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhysical \u0026amp; Audible Signs:\u003c\/strong\u003e Metallic substrate rattle under acceleration, sulfur exhaust smell, and audible ticking or hissing from rusted manifold and flex joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivability \u0026amp; Compliance Impact:\u003c\/strong\u003e Increased exhaust backpressure, sluggish throttle response, cabin fume intrusion, and failed OBD-II emissions testing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe 409 Stainless Direct-Fit Exhaust Solution\u003c\/h3\u003e\u003cp\u003eThis complete manifold-to-tailpipe assembly restores factory flow geometry on \u003cstrong\u003eXL20\u003c\/strong\u003e FWD models using corrosion-resistant \u003cstrong\u003e409 stainless steel\u003c\/strong\u003e tubing and mandrel-bent piping. Precision-welded factory-style flanges, heavy-duty hangers, and integrated flex sections eliminate exhaust leaks while maintaining quiet OEM acoustic damping. Replacing all three catalytic converters, connecting pipes, resonator, and muffler together matches OEM specifications for \u003cstrong\u003e16350\u003c\/strong\u003e, \u003cstrong\u003e56166\u003c\/strong\u003e, \u003cstrong\u003e53576\u003c\/strong\u003e, and \u003cstrong\u003e53575\u003c\/strong\u003e with direct bolt-on alignment requiring no cutting or welding.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 Front Manifold Catalytic Converters\u003c\/li\u003e\n\u003cli\u003e1 Intermediate Catalytic Converter\u003c\/li\u003e\n\u003cli\u003e1 Flex Intermediate Pipe\u003c\/li\u003e\n\u003cli\u003e3 Connecting Pipes\u003c\/li\u003e\n\u003cli\u003e1 Resonator\u003c\/li\u003e\n\u003cli\u003e1 Rear Muffler\u003c\/li\u003e\n\u003cli\u003e4 U-Clamps\u003c\/li\u003e\n\u003cli\u003e3 Ring Gaskets\u003c\/li\u003e\n\u003cli\u003e1 Flange Gasket\u003c\/li\u003e\n\u003cli\u003eSprings, 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;\"\u003e2004-2006 Toyota Sienna (FWD Only)\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;\"\u003e3MZ-FE 3.3L V6 \/ XL20\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\u003ctr style=\"background-color: #f9f9f9;\"\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;\"\u003e16392, 16393, 54614, 16350, 56166, 53576, 53575\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2004-2006 Toyota Sienna CE (3.3L V6, FWD Only)\u003c\/li\u003e\n\u003cli\u003e2004-2006 Toyota Sienna LE (3.3L V6, FWD Only)\u003c\/li\u003e\n\u003cli\u003e2004-2006 Toyota Sienna XLE (3.3L V6, FWD Only)\u003c\/li\u003e\n\u003cli\u003eExclusions: Does not fit AWD Siennas or 2007-and-later 3.5L models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the \u003cstrong\u003eXL20\u003c\/strong\u003e Sienna?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 2004-2006 Toyota Sienna FWD (CE, LE, and XLE) equipped with the \u003cstrong\u003e3MZ-FE 3.3L V6\u003c\/strong\u003e engine. \u003cstrong\u003eIt does not fit AWD models, 2007+ 3.5L models, and is not legal for sale or use in California, Colorado, New York, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this resolve \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e catalyst codes, and is welding required?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, it clears catalyst efficiency faults with zero welding required.\u003c\/strong\u003e Replacing all three converters restores downstream O2 sensor readings on OBD-II \u003cstrong\u003e3MZ-FE 3.3L V6\u003c\/strong\u003e vehicles, while factory-style flanges bolt directly to the exhaust manifolds and hangers.\u003c\/p\u003e\u003ch4\u003eAre gaskets and mounting hardware included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e The package supplies 3 ring gaskets, 1 flange gasket, 4 U-clamps, plus the required springs, bolts, nuts, and washers so the full system installs in one service bay visit.\u003c\/p\u003e\u003ch3\u003eThe Toyota Precision Standard\u003c\/h3\u003e\u003cp\u003eEngineered for long-term OBD-II emissions accuracy and leak-free daily reliability on the \u003cstrong\u003eXL20\u003c\/strong\u003e platform. This complete 409 stainless system eliminates recurring exhaust patchwork and keeps your \u003cstrong\u003e3MZ-FE 3.3L V6\u003c\/strong\u003e quiet and code-free.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68092039397624,"sku":"DS-EE6S047NE","price":463.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-system-with-catalytic-converter-for-toyota-sienna-2004-2006-3-3l-1.jpg?v=1794596284","url":"https:\/\/performancechiptuning.com\/fr\/products\/exhaust-system-with-catalytic-converter-for-toyota-sienna-2004-2006-3-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}