This AF - 2 rear diffuser is ideal for BMW X5 owners from 2014 to 2018 who want to upgrade their car's look and performance. Use it when you want to make your BMW stand out on the road. It's made of FRP material which is both strong and light. The diffuser is a single - piece unit and is designed to fit all 2014 - 2018 BMW X5 models perfectly. Professional installation is needed to ensure it's set up correctly.