3" 90 Degree Aero Port KitEXPF3: 3" 90 degree flared aero port It has never been so easy to correctly port and tune your bags! Port and speaker performance all depends on efficiency of the port design and how well it can work. Our new 90 deg 3" aero ports solve these problems. Increased smooth airflow through the port will result in more output and less potential for any port noise or port velocity restrictions at higher volumes. Extremely easy to install into any bag. Find a