Charge Air Cooler
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The CAC is a liquid-to-air cooler. The CAC cools and increases the density of the compressed turbocharged air. Two intake air tubes and two coolant hoses connect the CAC with other system components.