{"product_id":"exhaust-system-with-catalytic-converter-for-hyundai-sonata-2011-2014-2-4l","title":"Exhaust System with Catalytic Converter for Hyundai Sonata (2011-2014) 2.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit 409 Stainless Exhaust System with Catalytic Converter for 2011-2014 Hyundai Sonata (YF)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct-fit exhaust and underbody catalytic converter restores emissions conversion and exhaust sealing from the front flex pipe to the rear muffler on the 2011-2014 Hyundai Sonata (\u003cstrong\u003eYF\u003c\/strong\u003e) equipped with the \u003cstrong\u003e2.4L Theta II (G4KJ)\u003c\/strong\u003e engine.\u003c\/p\u003e\u003ch3\u003eThe Stock Hyundai Sonata Exhaust Failure\u003c\/h3\u003e\u003cp\u003eOn sixth-generation \u003cstrong\u003eYF\u003c\/strong\u003e models equipped with the \u003cstrong\u003e2.4L Theta II (G4KJ)\u003c\/strong\u003e engine, thermal cycling and road salt rapidly corrode the front flex pipe, underbody converter, intermediate pipe, and rear muffler welds. As the flex bellows fray or flange seams perforate, ambient air enters upstream of the secondary O2 sensor. Combined with thermal shock fracturing the ceramic honeycomb substrate, this triggers \u003cstrong\u003eP0420\u003c\/strong\u003e catalyst efficiency faults and degrades exhaust scavenging.\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 Triggers \u003cstrong\u003eP0420\u003c\/strong\u003e from fractured ceramic converter media or upstream exhaust leaks skewing downstream O2 sensor readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudible Leaks \u0026amp; Rattles:\u003c\/strong\u003e Metallic substrate rattling inside the housing or loud exhaust ticking from perforated flex joints and rotted muffler seams.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivability \u0026amp; Compliance Impact:\u003c\/strong\u003e Failed state emissions inspections, exhaust odor in the cabin, and sluggish acceleration from plugged converter honeycomb increasing backpressure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe 409 Stainless Exhaust \u0026amp; Converter Solution\u003c\/h3\u003e\u003cp\u003eBuilt from corrosion-resistant \u003cstrong\u003e409 stainless steel\u003c\/strong\u003e, this assembly replaces the entire underbody exhaust from the front pipe to the rear muffler in one bolt-on installation. Mandrel-bent tubing maintains factory routing and flow geometry, while precision-welded OEM-style flanges and hanger rods eliminate cutting or welding. The direct-fit converter features a \u003cstrong\u003eceramic substrate\u003c\/strong\u003e and stock-position O2 sensor bungs to restore quiet factory acoustics and \u003cstrong\u003eFederal Emission System\u003c\/strong\u003e compliance without check engine lights.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 Front Pipe\u003c\/li\u003e\n\u003cli\u003e1 Catalytic Converter (Underbody)\u003c\/li\u003e\n\u003cli\u003e1 Intermediate Pipe\u003c\/li\u003e\n\u003cli\u003e1 Rear Muffler\u003c\/li\u003e\n\u003cli\u003e3 Flange Gaskets\u003c\/li\u003e\n\u003cli\u003e2 U-Clamps\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;\"\u003e2011-2014 Hyundai Sonata\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;\"\u003e2.4L Theta II (G4KJ) \/ YF\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;\"\u003e506144, 305144, 603170, 52547, 40897, 55641, 53893\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2011-2014 Hyundai Sonata 2.4L 4-Cylinder (Federal Emission System Only)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the YF Sonata?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 2011-2014 Hyundai Sonata equipped with the \u003cstrong\u003e2.4L Theta II (G4KJ)\u003c\/strong\u003e engine. \u003cstrong\u003eNot legal for sale or use in California, Colorado, New York, or Maine; fits 49-state OBD-II Federal Emission System vehicles only (CARB models excluded).\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eDoes this include the manifold converter or O2 sensors, and will it clear P0420?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo, the manifold catalytic converter and O2 sensors are not included.\u003c\/strong\u003e Reuse your factory manifold converter and healthy O2 sensors; installing this sealed underbody assembly resolves exhaust leaks and clears \u003cstrong\u003eP0420\u003c\/strong\u003e codes caused by a failed underbody converter.\u003c\/p\u003e\u003ch4\u003eIs welding needed, and are gaskets included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo cutting or welding is required.\u003c\/strong\u003e The kit includes \u003cstrong\u003e3 flange gaskets\u003c\/strong\u003e and \u003cstrong\u003e2 U-clamps\u003c\/strong\u003e to bolt directly onto factory hangers and flanges, replacing OEM references \u003cstrong\u003e506144\u003c\/strong\u003e, \u003cstrong\u003e305144\u003c\/strong\u003e, \u003cstrong\u003e603170\u003c\/strong\u003e, \u003cstrong\u003e52547\u003c\/strong\u003e, \u003cstrong\u003e40897\u003c\/strong\u003e, \u003cstrong\u003e55641\u003c\/strong\u003e, and \u003cstrong\u003e53893\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe Hyundai Precision Standard\u003c\/h3\u003e\u003cp\u003eEngineered to match OEM backpressure specs and ECU sensor tolerances, this 409 stainless assembly delivers leak-free durability and reliable catalyst efficiency. It restores quiet cabin acoustics and CEL-free operation without custom exhaust fabrication.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68094139105528,"sku":"DS-EG5JMNG3G","price":651.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-system-with-catalytic-converter-for-hyundai-sonata-2011-2014-2-4l-1.jpg?v=1794614822","url":"https:\/\/performancechiptuning.com\/fr\/products\/exhaust-system-with-catalytic-converter-for-hyundai-sonata-2011-2014-2-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}