Roush Performance

Ford Mustang Exhaust Extreme Kit Generates deep off-road exhaust tone Increases horsepower and torque Increases fuel efficiency No in-vehicle exhaust drone Manufactured using CNC bending to create smooth mandrel bends (resulting in higher flow) Made from 2.5-inch diameter stainless steel tubing Includes 4-inch diameter tips made from polished 304 stainless steel Comes with OEM clamps that won't damage pipes when tightened and provide a leak-proof seal No welding or cutting required Fits 2005 - 2009 Mustang GTs and Shelby GT500s with the stock rear fascia Part #403936