Use this rear diffuser when you're looking to upgrade the look of your 2007 - 2012 Nissan Altima 4DR. It's perfect for car enthusiasts who want to add a touch of style to their vehicles. The diffuser is made of FRP material, which is lightweight yet strong. While the exact size and weight aren't given, you can expect it to fit your 4 - door Nissan Altima seamlessly and enhance its overall aerodynamics and appearance.