E46 M3-Carbon Fiber Side Skirt ExtensionsE46 M3 Carbon Fiber Side Skirt Extensions Enhance the side profile of your BMW E46 M3 with these Carbon Fiber Side Skirt Extensions. Designed to add a more aggressive and motorsport inspired appearance, these extensions perfectly complement the factory body lines while giving your M3 a lower and more performance focused stance. Constructed from high quality carbon fiber and finished with a premium glossy clear coat, these side skirt extensions provide