Getting the best possible performance requires an installation of numerous body kits. Most of these parts have a dual function, better downforce as well as improved visual appeal. Used mostly for professional racing purposes, rear diffusers are usually not that transparent. Its visual effect on the car may not be very big, but its influence on the airflow is significant. The thing is that the air velocity under the vehicle is much higher compared to the airflow ambient atmosphere. This part of the vehicle provides some kind of a pressure recovery, which means a better transition between fast airflow and slow freestream air. The result is prevented issues like flow separation and drag.
Just like other common performance automotive accessories, there are rear diffusers from various manufacturers. These parts are mostly universal, but there are some custom fit models as well. One of the most popular brands is Reverie. This British manufacturer covers a wide range of different car models for all major carmakers. Another highly popular brand is APR Performance, as well Outcast Garage. Another company that offers a wide range of diffusers for both cars and truck models is Ebiz Global. Finally, there is also a popular industry name from Australia, J Racing, as well as Seibon that is specialized for body kits made of carbon fiber.
Materials for rear diffusers are numerous. Today’s auto industry offers a variety of products made of different materials. Most of them are composite materials.Some of the most common are fiberglass reinforced plastic (FRP), ABS plastic, carbon fiber, stainless steel, and aluminum. All are pretty good for this purpose. Of course, there are pros and cons of each material. FRP is one of the most popular materials. It is affordable and light, but not very durable. On the other side, ABS is chemical and dents resistant plastic, which is heavier and costs more. Stainless steel could be expensive, while aluminum is light but not that strong, just like it is the case with fiberglass.