Inlet / Outlet Size (IN). 2.5" OD / 1.9" OD. Made of High Quality T-304 Stainless Steel with Computerized Mandrel-Bends i. High Performance JDM Racing Design. TIG Welded CNC Machine Flange for Strength and Durability.Increase Engine Output and Efficiency. Gain 10 - 15 HPs. Bolt(s) and Metal Gasket(s) Included. Direct Bolt-On Installation, Requires NO Modification. Professional Installer is Highly Recommended (No Instruction Included). The item "For 06-11 Honda Civic FG1 FA1 1.8L R18A1 Stainless Steel Racing Exhaust Header" is in sale since Thursday, August 29, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Exhaust\Exhaust Manifolds & Headers". The seller is "speedracingturbo" and is located in Carol Stream, Illinois. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia, South africa, New Zealand, Egypt, Reunion.