On the F series BMWs, the rear brakes get relatively hot on track due to electronic systems using the rear brakes for traction, stability, etc.
These ducts are used to increase airflow to your brakes. This will help cool the brakes, increasing the longevity of your pads and reduce brake fade.
Made out of ABS with a high quality smooth finish. The ducts are Plug & Play, but to allow air to the rear brakes it is necessary to drill holes in the dust shield behind the brake discs.
