I found that with 1-1/2" hose I could route the passengers air vent to a spot that would allow for symmetrical airflow. nothing worse than feeling like only half of your body is air conditioned :) The Scat tubing is smooth inside and will run under the strake via "NACA vent" into a sharp 90 degree turn into the small area inside the pilot's back seat bulkhead. It fits perfectly and will put the vent directly in front of the passenger. The Aveo Vents are NICE!