HARD Motorsport - BMW E46 M3 Brake Cooling Low-Profile Duct Kit (PAIR) (E46BRKDUCTKIT)Overheating your brakes can end an entire weekend at the track and is the most common reason for premature brake failure and wear. Hi Flow Molded, Low Profile ABS Cooling Ductwork: The HARD Motorsport Brake Cooling DUCT kit is designed for maximum efficiency specifically for the BMW E46. The Low Profile design allows for more clearance for greater turning radius. An aluminum plate on the exterior side adds even more protection against wear from tire