I was surprised by how interested people were to find out we made a relatively benign change to the Cybertruck aero shield, a part of the car most people never even see. So I'll share some more details. Here are two photos, the left is one of the latest trucks off the production line and the right is one of the first 1. The obvious change from Aluminum to a new black material - many assumed it's Carbon fiber due to the color and pattern. It's actually a self-reinforcing polypropylene. The PP is stretched into fibers and then laminated into the form. It turned out to be more durable, lighter and cheaper than the aluminum when manufactured this way 2. The material change also enabled geometry improvements around the bolts and edges as well as minor form changes. These couldn't be easily done in stamped Aluminum but all benefited aerodynamic drag The end result was a part that is better for aerodynamics, and better for impact resistance while reducing cost and mass. This is a part no customer sees or really even thinks about, but we made it better anyway