Improves Horsepower. This SR Performance Cold Air Intake kit completely replaces your GT Mustangs restrictive stock air box and paper filter element with a high flow filter assembly for a noticeable increase in horsepower and acceleration while providing filtration of harmful power robbing dust particles. The SR Performance CAI improves the airflow path into your engine creating more power. No Tune Required. Unlike other Cold Air Intakes on the market for the 2005-2009 GT mustangs this SR Performance CAI does not require a computer re-tune. The engineers at SR Performance really did their homework to improve your pony's power using the stock tune. Reusable Filter. Included in this kit is a SR Performance High Flow reusable air filter. So there is no need to go out and buy a new filter every few thousand miles. Just clean the filter, re-oil it, save money, and go. Polished Finish. The SR Performance Cold Air Intake not only improves horsepower and acceleration, but it also improves your Pony's under hood appearance with a striking polished aluminum finish. Now you can have the best of both worlds, performance and style. Easy Install. The SR Performance Cold Air Intake kit is designed to install easily with basic hand tools. No extra modifications or special tools are required for the installation. All parts and instructions are included. Application. This SR Performance Cold Air Intake System is specifically designed to fit the 2005 to 2009 GT and Bullitt Mustangs equipped with the 4.6L engine and does not require re-tuning the vehicles computer for operation.