This is AutoTecknic's Performante Vacuumed  Carbon Fiber Aero Splitters for the E90 M3 Sedan / E92 M3 Coupe / E93 M3  Convertible. Designed to screw directly into the  lower factory bumper mounting location for a simple and fast installation. This  carbon fiber splitter is made of 100% true vacuum technology for the ultimate  light-weight, high-durability and precise-fitment. AutoTecknic Performante  Vacuumed Carbon Fiber Aero Splitters are both highly visible and highly  functional. - 2x2 Weave - Vacuumed Technology - One piece construction - Utilizing OEM mounting location & double-sided tape  for a breeze install. Just like a car, you can help to reduce these by waxing  the case.