The RAM 1500 range breathes on its own! It comes standard with ActiveAir® Grille shutters, which block front-end airflow openings to reduce drag while maintaining optimal engine temperatures. Reduced drag helps improve efficiency. These shutters open and close automatically, based on various inputs from the vehicle. For example, when a vehicle is travelling at highway speeds and producing moderate engine temperatures, the shutters are closed, which directs airflow around the vehicle to reduce drag and improve efficiency. When the vehicle is operating in heavy stop-and-go traffic or pulling a trailer, the shutters remain fully open to allow air to flow into the engine compartment for optimal engine cooling.