Ok so I've been trying to research this, I'm kinda going toward the air gap but idk yet. I have a performer rpm with a one in. spacer right now and it kinda feels like it dies off at 6000. Now this is my daily driver I drive to work in summer time everyday. I'm Going to run a 100 shot on it too but i cant find anything on if pll have been spraying on the air gap intake. They are both the same price so I just need opinions on which one to get