Use this Duraflex Ducktail Rear Wing Spoiler when you want to upgrade the look of your 2003 - 2008 BMW Z4, whether it's for daily driving or hitting the track. It's perfect for BMW Z4 enthusiasts who want to add a touch of style and performance to their cars. The spoiler is made of FRP material, which is lightweight, making it easy to install and doesn't add much extra weight to your vehicle.