For Sicon FR-S/Subaru BRZ 2.75" Stainless Steel Turbo Exhaust Downpipe Made of High Quality T-304 Stainless Steel with Computerized Mandrel-Bends i.e. Maximizing Smoothest Exhaust Airflow TIG Welded CNC Machine Flange for Strength and Durability Increase Engine Output and Efficiency; Gains 10-15 HPs Inlet: 2.75" / Outlet: 2.75" / Piping Diameter: 2.75" Direct Bolt-On Installation, Requires NO Modification