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 contains a Merge X-Pipe for increased performance and improved sound. It delivers the classic S-Type sound with no drone inside the vehicle. The system features 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. BORLA® Cat-Back™ and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere.