{"product_id":"2006-2011-honda-civic-si-2-0l-k20z3-4-2-1-exhaust-header","title":"Exhaust Header Fit for 2006-2011 Honda Civic Si 2.0L K20Z3 4-2-1","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003ePerformance exhaust header designed for compatible 2006-2011 Honda Civic Si models equipped with the 2.0L K20Z3 4-cylinder engine. Featuring a 4-2-1 racing-style layout, 1-3\/4 in inlet ports, a 2 in flange-end outlet, mandrel-bent tubing, TIG-welded polished stainless steel construction, and thick steel flanges, this header is designed for the specified Civic Si exhaust configuration.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFit for 2006 Honda Civic Si 2.0L K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFit for 2007 Honda Civic Si 2.0L K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFit for 2008 Honda Civic Si 2.0L K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFit for 2009 Honda Civic Si 2.0L K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFit for 2010 Honda Civic Si 2.0L K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFit for 2011 Honda Civic Si 2.0L K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCompatible with listed \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFG2 \/ FA5\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Civic Si applications\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eFits 2.0L K20Z3 4-Cylinder Engine Applications Only\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlease verify your exact model year, Si trim, engine code, chassis code, cylinder-head flange pattern, O2 sensor configuration, and downstream exhaust connection before purchasing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModified exhaust systems, engine swaps, aftermarket mid-pipes, or other non-original components may affect installation compatibility\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Highlights\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCivic Si K20Z3 Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed specifically for compatible 2006-2011 Honda Civic Si models equipped with the 2.0L K20Z3 engine\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e4-2-1 Racing Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Four primary exhaust paths merge into two sections before combining into a single outlet\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e1-3\/4 in Inlet Ports\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Features the specified 1.75 in inlet port dimensions\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e2 in Outlet\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Uses a 2 in flange-end outlet for connection to a compatible downstream exhaust system\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMandrel-Bent Tubing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Mandrel-bent construction helps maintain smooth tubing transitions through the header\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePolished Stainless Steel\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Stainless steel construction with a polished finish provides durability and a clean performance appearance\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTIG-Welded Construction\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – TIG-welded assembly supports strength throughout the header system\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eThick Steel Flanges\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Heavy flange construction supports secure mounting at compatible connection points\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eGaskets Included\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Supplied with gaskets for installation; original vehicle bolts are reused as specified\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eProduct Type: Exhaust Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVehicle Make: Honda\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVehicle Model: Civic Si\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVehicle Years: 2006-2011\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngine: 2.0L\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngine Code: K20Z3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngine Configuration: 4-Cylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eListed Chassis: FG2 \/ FA5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeader Configuration: 4-2-1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInlet Port Size: 1-3\/4 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutlet Size: 2 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaterial: Stainless Steel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTube Construction: Mandrel-Bent\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWelding: TIG-Welded\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFinish: Polished\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFlanges: Thick Steel Flanges\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003ePackage Includes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × Exhaust Header System\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGaskets\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePlease verify your exact vehicle year, Civic Si trim, engine code, and chassis before purchasing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for compatible 2006-2011 Honda Civic Si 2.0L K20Z3 applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConfirm cylinder-head flange alignment, gasket seating, O2 sensor locations, exhaust routing, and downstream connection before installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eGaskets are included; reuse the original vehicle bolts as specified\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTest-fit the header and verify surrounding clearance before final tightening\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModified mid-pipes, cat-back systems, previous exhaust repairs, or other non-original components may affect installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProfessional installation is recommended\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Peforway","offers":[{"title":"Default Title","offer_id":50986753327347,"sku":"MT001021","price":167.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6999\/3459\/files\/E6_9C_AA_E6_A0_87_E9_A2_98-1_1787723181223.jpg?v=1788762153","url":"https:\/\/peforway.com\/products\/2006-2011-honda-civic-si-2-0l-k20z3-4-2-1-exhaust-header","provider":"Peforway","version":"1.0","type":"link"}