Ford Focus 04-06 2.3L Duratec 2.0L Cold Air Intake - Blue Fitment: Ford Focus 00-04 Come with a 3" stainless steel filter This Cold Air Intake System allows maximum airflow through the stock manifold system Maximum airflow through the throttle body is reached, and maximum airflow results in better throttle response and more horsepower Increase 5-10% horsepower