Build Your Own Carbon Fiber Aero Kit - G80 M3Build Your Own G80 M3 Carbon Fiber Aero Kit Create a fully custom exterior transformation for your G80 M3. This kit lets you mix and match any carbon fiber piece from our entire G80 lineup to build the exact look you're after, whether that's subtle OEM+ refinement or full on track ready aggression. Every component is constructed from high quality carbon fiber and finished with a UV protectant gloss coat for lasting durability and rich visual depth.