System will fit Bullitt models. NOT recommended for use on Convertibles. This 3" diameter high flow Cat-Back™ system was designed specifically for the Mustang GT and has Active Exhaust Valves. Includes 2) 3" O.D. x 2.25" O.D. x 7" long adapters for clamp on installation to the stock exhaust system. Do not use the adapters for full 3” inlets. The system features a Merge X-Pipe for increased performance and improved sound. The system has BORLA®'S Polyphonic Exhaust Harmonizer which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean, rich, full-bodied sound to the BORLA® mufflers. The mufflers then enhance this sound to the character and volume of the aggressive ATAK® sound, with no drone inside the vehicle. The exhaust exits thru dual 4" round bright chrome on T-304 stainless steel tips on each muffler. Systems with black chrome on T-304 stainless steel tips, and carbon fiber tips are also available.