Since I moved the location of the cabin air vents, I also needed to provide a different routing of the 2" scat hose. I used a big steel washer, with in inned diameter of 2" for a routing template. I then deburred and attached a caterpillar grommet. I then pulled through the scat hoses, trimmed the hoses and used the hose clamps to secure them to them Naca inlets and cabin vents.. Worked out very nice.