For Honda/Acura Stainless Steel Turbo Downpipe/Dump Pipe - T3 T4 5Bolt Flange Made of high quality T-304 stainless steel with computerized mandrel-bends TIG welded CNC machine flange for strength and durability Maximizing smoothest exhaust airflow Increase engine output and efficiency. Gain 10 - 15 HPs (approximately) Metal Gaskets included.