For Ford F150 11th Gen Dual 3.5" Muffler Tip Stainless Steel Catback Exhaust System Muffler Exhaust Tips: Dual 3.5" / Piping Inlet Size: 2.25" / Major Piping Diameter: 2.5" Made of High Quality T-304 Stainless Steel TIG Welded CNC Machine Flange for Resistance against Pressure and Corrosion Aggressive Deep Sound while Ensures Smooth Exhaust Gas Flow Dyno Proven to Instantly Increases 20 -25 Horsepower/ Low End Torque