I did it. Eliminated the 2000 rpm exhaust drone | Hot Rod Forum
Scott Helme on Twitter: "The new Power Valve system has a DDE (Dynamic Drone Eliminator) built in to control the bass/hum/drone inside the car. Loud exahust but without the annoying drone in
How To Reduce Or Eliminate Obnoxious Exhaust Drone, Noise From Your Vehicle, Car or Truck - Part 1 - YouTube
Completely eliminated exhaust drone | Mustang Forums at StangNet
Exhaust Drone | What Is Exhaust Drone and How Do You Fix It? - Lethal Performance