A cold air intake is an aftermarket automotive part designed to improve engine performance by increasing airflow. It replaces the factory air intake system, allowing cooler air to enter the engine. Cooler air is denser, which can enhance combustion efficiency and potentially increase horsepower and torque. These systems often feature a larger diameter tubing and a high-flow air filter, which helps reduce restrictions in airflow. By optimizing the air intake process, cold air intakes can contribute to better fuel efficiency and a more responsive throttle. Many car enthusiasts install them to enhance the performance of their vehicles, particularly in sports cars and tuning communities.