If you put these in your plane you are required to wear Van Heusens when you fly and have the appropriate amount of epaulets denoting your standing in the aviation community.
http://www.knots2u.net/cessna-aerovent-system-cessna-single-engine-series/In full disclosure I purchased these to put in the 185 but they didn't clear the v-brace, so I was forced to hang up my Van Heusens, quit flying huge patterns,
and use the Precise-flow Air Vent kit.
http://www.sportys.com/Pilotshop/product/9578Now everywhere I land people come up to my plane and admire my precise airflow, whereas when they see those penis colored prophylactic vent tubes they are first shocked

, then a little embarrassed

, and then try and slip away without drawing too much attention to themselves.
