Yes on my Just Aircraft SuperStol I installed bypass slide door that I purchased from Vans, which I installed on the rubber end of the K & N filter. My K&N filter is installed directly to the turbo. I had a 2 piece aluminum housing built that goes over the K&N filter, this housing has a round nipple that I attach scat hose to, then the opposite end of that scat is connected to the inside nose of my bottom cowl. I attached an aluminum flange for the scat to attach to on the inside of cowling. When I park a tennis ball fits perfectly into the air inlet on outside of cowl. I have orange parachute cord attached to the tennis ball and loop it over my control stick in cockpit so I don?t ever forget to remove the tennis ball.