What is the clean air mod on a F4I?
#51
This is what I did. I took hose 3 and made it go from the pair valve to where #4 goes in. I then sealed the air box with pieces of hose stuffed with a plumber putty. I also unplugged the pair valve so it stays open. This is the cheapest and easiest way to do it. The only thing I bought was a new clamp for where it goes in on #4.