I'm running a K&N CAI without the screen and get short spikes to about 11 on my LM-1 A/F meter during cruise. I wanted to run some tests with the screen back in to see if the spikes will go away, BUT when I looked at the screen, I noticed it has a lip (flange) that extends from the edge of the seal around the screen. and I can't remember which way the lip faced when I took it out. Can anyone tell me which way it reinstalls?