M4 GT4 Carbon Brake Cooling Plates
Genuine BMW M4 GT4 Race Brake Duct Plates - Carbon
Genuine BMW Motorsport parts.
The cooling plates attach to the back of the brake rotors with 2 hose connection points. 1 from the carbon duct that fixes to the front bumper and the other from the duct intergrated into the front splitter.
Hosing can be added with the Carbon Brake Ducts HERE.