BMW Genuine M Performance Rear Carbon Spoiler For 4 Series F36 51622407543. Even more dynamic elegance and a more athletic look: The BMW M Performance rear spoiler, made of 100 percent carbon fibre, highlights the car’s unique appearance and ensures optimised aerodynamic qualities. The high-quality carbon fibre is meticulously crafted by hand. Visually and technologically, the rear spoiler is perfectly tailored to the vehicle design. Benefits of the BMW M Performance carbon fibre rear spoiler at a glance. Perfectly complements the vehicle design. Sealed with a clear varnish. UV, water and temperature-resistant. IMPORTANT NOTICE: This product is for installation by trained technicians and not by an end user. Installation must be performed exclusively by a specialist workshop. Your local BMW Centre will be able to assist with installation. 1 M Performance rear spoiler carbon. The M Performance rear spoiler are made entirely from carbon fibre-reinforced plastic (CRP, carbon). All parts are sealed with clear varnish.