What's the hole for then?
It does appear there is space around the hub area, so I'm assuming that's where the air is coming out? That little hole is no even close to being 3".
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."