Use this rear diffuser when you want to enhance the look of your 2012 - 2018 BMW 3 Series F30. It's perfect for car enthusiasts who love to customize their vehicles and make them stand out. The diffuser is made of FRP material and comes as a single - piece unit. Although specific size and weight aren't mentioned, you can expect it to fit well with your M3 look rear bumper as it's designed for that purpose. Professional installation is needed to ensure it's properly set up.