Makes a difference in performance! The Bully Dog Rapid Flow Cold Air Induction Intake is built to increase the engine's ability to breathe. By replacing the restrictive stock intake, it increases horsepower, torque, fuel efficiency, and decreases exhaust gas temperatures. By removing the stock air box, replacing it with a metal heat shield, and using a conical air filter, you can maximize the air filter cleaning area. Bully Dog Rapid Flow Cold Air Induction Intake = more air = more gas!