Flowtech Exhaust Header Reducer - 10005 Part #: 10005 Line: FLT Flowtech Exhaust Header Reducer 1 Year Limited Warranty Color: Gray Finish: Natural Inlet Diameter (in): 2-1/2 Inch Outlet Diameter (in): 2-1/4 Inch Attachment Method: Bolt-On Collector Size (in): 2-1/2 Inch Gasket Or Seal Included: Yes Oxygen Sensor Bung Included: No Show More Show Less