4-inch sport air filter with gaskets, fits smaller sizes. Clean, new, in factory condition, used for one week. Suitable for increasing air intake efficiency and improving engine response. A practical and flexible option suitable for most cars. Multi-size sport filter. Suitable for replacing any existing sport air filter. An excellent option for creating a custom air intake system. Supports improving engine airflow. Washable and lasts a long time. A beautiful sound even without an intake. There is a video for those who want to hear its sound.