I attached the SCAT tube in the tunnel today. Because I installed an Andair fuel selector, I had the typical clearance for the SCAT tube that other builders have faced. I decided to reduce my 2" SCAT TO 1.5" around the valve and then resize it to connect to the rear outlet. I also added a tie wrap clip and tie wrap to the center to snug it over making sure it stayed put. Worked great. This also gave me a little more room for my audio jacks I plan installed earlier today.