Part #: CF-801850. The APR Brake Cooling Ducts are aerodynamically optimized to draw in huge amounts of air. Thanks to the venturi effect, as your vehicle speeds up, the air flowing into the ducts increases in both pressure and velocity as it moves from the larger front area into the smaller pipe section of the brake duct. Pair these ducts with suitable high - temperature air duct hoses (not included; you can buy them from your preferred racing - supply store), and they'll channel large volumes of fresh air to cool down the overheated brake rotors lap after lap on the track. Excessive heat can cause costly damage to your car's critical parts. Engine bays, radiators, brakes, transmissions, and differentials all need good airflow to get rid of unwanted heat. APR Air Ducts bring fresh cooling air to areas that need extra cooling. Made from pre - preg carbon fiber reinforced polymer (CFRP) composite materials, they offer an excellent strength - to - weight ratio, adding both functionality and lightness where it matters. Features: Carbon Fiber Construction: This part is formed in an autoclave at high temperatures using pre - impregnated carbon fiber manufacturing processes, providing high strength and low weight. UV Resistant Coating: Each air duct is finished with a UV - resistant clear - coat paint to withstand various environmental conditions. Treat it like your car's paint finish, polish it, and then coat it with high - quality wax or a synthetic protectant.

Using the APR Brake Cooling Ducts is quite straightforward. First, make sure your Subaru STI is parked safely and turned off. Install the ducts in the appropriate areas as per the vehicle's specifications. Remember, you'll need to buy high - temperature air duct hoses separately from a racing - supply shop and connect them to the ducts. When driving on the track, these ducts will automatically draw in air to cool your brake rotors. As for maintenance, keep an eye on the UV - resistant clear - coat. Just like you take care of your car's paint, regularly polish the ducts and then apply a good - quality wax or synthetic protectant. This will help them resist environmental wear and tear. Also, periodically check the installation to ensure the ducts are securely in place and there are no signs of damage or loose connections.