{"product_id":"catalytic-converter-for-honda-civic-si-2012-2015-2-4l","title":"Catalytic Converter for Honda Civic Si (2012-2015) 2.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Exhaust Manifold Catalytic Converter for 2012-2015 Honda Civic Si (FB6\/FG4)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct-fit exhaust manifold catalytic converter bolts directly to the cylinder head on 2012-2015 Honda Civic Si (\u003cstrong\u003eFB6\/FG4\u003c\/strong\u003e) models with the \u003cstrong\u003eK24Z7 2.4L\u003c\/strong\u003e engine to restore exhaust flow, eliminate catalyst efficiency fault codes, and convert HC, CO, and NOx emissions.\u003c\/p\u003e\u003ch3\u003eThe Stock Honda Civic Exhaust Manifold Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eFB6\/FG4\u003c\/strong\u003e Civic Si equipped with the \u003cstrong\u003eK24Z7 2.4L\u003c\/strong\u003e engine, the factory catalytic converter is integrated directly into the exhaust manifold at the cylinder head. Positioned inches from the exhaust ports, extreme thermal cycling and heat soak cause the OEM ceramic honeycomb to fracture or poison over high mileage. As the precious-metal washcoat degrades, oxygen storage capacity drops and triggers \u003cstrong\u003eP0420\u003c\/strong\u003e or \u003cstrong\u003eP0430\u003c\/strong\u003e faults. A broken internal brick also rattles under deceleration and restricts exhaust gas scavenging.\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 Triggers \u003cstrong\u003eP0420\u003c\/strong\u003e or \u003cstrong\u003eP0430\u003c\/strong\u003e when post-catalyst oxygen sensor readings mirror upstream exhaust fluctuations due to depleted washcoat efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetallic Exhaust Rattle:\u003c\/strong\u003e Fractured internal ceramic substrate pieces vibrate inside the manifold housing, particularly during cold starts or off-throttle deceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSluggish Acceleration \u0026amp; Failed Emissions:\u003c\/strong\u003e Dislodged honeycomb chunks create severe exhaust backpressure, choking top-end \u003cstrong\u003eK24Z7\u003c\/strong\u003e power while failing federal tailpipe inspections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Stainless Exhaust Manifold Solution\u003c\/h3\u003e\u003cp\u003eThis one-piece exhaust manifold catalytic converter replaces the failed OEM assembly using a corrosion-resistant stainless steel body and tubular runners engineered to withstand cylinder-head heat. Inside the 8-inch by 5-inch canister, a high-flow ceramic honeycomb substrate treated with a precious-metal washcoat restores proper HC, CO, and NOx conversion for OBD-II compliance. Precision-stamped head flanges, a factory-style downstream outlet, and integrated pre- and post-catalyst oxygen sensor bungs ensure leak-free sealing without cutting or welding.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 x Direct-Fit Exhaust Manifold Catalytic Converter Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Exhaust Manifold Gasket\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;\"\u003e2012-2015 Honda Civic Si (Coupe \u0026amp; Sedan)\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;\"\u003e\n\u003cstrong\u003eK24Z7 2.4L I4\u003c\/strong\u003e \/ \u003cstrong\u003eFB6\u003c\/strong\u003e (Sedan), \u003cstrong\u003eFG4\u003c\/strong\u003e (Coupe)\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: Honda\u003c\/li\u003e\n\u003cli\u003eModel: Honda Civic Si 2.4L (Coupe and Sedan)\u003c\/li\u003e\n\u003cli\u003eYears: 2012, 2013, 2014, 2015\u003c\/li\u003e\n\u003cli\u003eEngine: 2.4L I4 (\u003cstrong\u003eK24Z7\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003eExclusions: Does NOT fit Civic 1.8L, Hybrid, or Natural Gas models\u003c\/li\u003e\n\u003cli\u003eEmissions Notice: EPA (Federal) compliant only; NOT CARB approved and not legal for vehicles registered in California, New York, Colorado, or Maine\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the FB6\/FG4 Civic?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 2012-2015 Honda Civic Si (\u003cstrong\u003eFB6\u003c\/strong\u003e sedan and \u003cstrong\u003eFG4\u003c\/strong\u003e coupe) equipped with the \u003cstrong\u003eK24Z7 2.4L\u003c\/strong\u003e engine. \u003cstrong\u003eIt does not fit Civic 1.8L, Hybrid, or Natural Gas models, and this EPA federal converter is not CARB approved 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 clears catalyst efficiency codes caused by a failed converter, though oxygen sensors are not included.\u003c\/strong\u003e Transfer your existing pre- and post-cat sensors or install new units, and verify there are no upstream exhaust leaks that could trigger \u003cstrong\u003eP0420\u003c\/strong\u003e or \u003cstrong\u003eP0430\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eAre gaskets included, and what installation prep is required?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, a new exhaust manifold gasket is included for the cylinder head flange.\u003c\/strong\u003e Let the exhaust cool completely, soak the factory fasteners in penetrating oil prior to removal, and torque all manifold nuts evenly before checking every joint for leaks.\u003c\/p\u003e\u003ch3\u003eThe Honda Performance Standard\u003c\/h3\u003e\u003cp\u003eRestoring unrestricted exhaust scavenging on the high-revving \u003cstrong\u003eK24Z7\u003c\/strong\u003e keeps VTEC crossover crisp and eliminates backpressure loss across the powerband. Built for daily-driven durability and accurate OBD-II readiness, this direct-fit assembly returns your \u003cstrong\u003eFB6\/FG4\u003c\/strong\u003e Civic Si to factory flow efficiency and throttle response.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68085741158648,"sku":"DS-EXHTBPTA0","price":194.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-honda-civic-si-2012-2015-2-4l-1.jpg?v=1794549892","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-honda-civic-si-2012-2015-2-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}