E90 M3 Forcewerks Carbon Fiber ExtensionsE90 M3 Forcewerks Carbon Fiber Extensions Add a more aggressive presence to your E9X M3 with the Carbon Fiber Forcewerkz Style Side Skirt Extensions. Designed to enhance the side profile with a lower and more motorsport inspired appearance, these extensions perfectly complement the factory body lines while adding an aggressive OEM+ touch. Constructed from high quality 2x2 carbon fiber weave, these side skirt extensions offer lightweight durability