Sounds about right mate, the AUM has a secondary air pump system which is on for about a minute when you first start the car. I always wait until its gone off before i drive away. My revs sit at about 1100rpm and then drop to 800rpm when it goes off.
As for the 007p i'm waiting for someone to come and flame me for saying that, but at the end of the day it was designed to go on a particular way, if you reverse it then the piston is being operated in a different config. Yes it will still work but as we all know with cars, if something makes a louder noise it usually means something is wrong lol!
As far as i am aware there is no actual benefit to "reversing" the 007p, just that it makes more noise - if you want the noise install your 007p the correct way and buy a CAI
