For Ford Bronco 4.7/5.0L V8 2PC Stainless Steel Long Tube Exhaust Header High Quality T-304 Stainless Steel with Computerized Mandrel-Bends for Strength and Durability i.e. Maximizing Smoothest High Exhaust Air Flow Rate 4-1 High Performance Racing Spec. Design, Produces the Most Top End Power Offers the Best Flow Characteristics for the Engine at High Engine Speeds Increase High Flow Air, Instantly Gain 10 -15 Hp. / Tq. Inlet/Outlet: 1.5"(OD)/ 3.00"(OD) / 2.5" Exhaust Collector Reducer / 16 Gauge Wall Piping / Metal Gasket Included