I too would ditch the CIA.
These guys talked me into De-modding my STI long ago. went from STU to AS. I went to a K&N Drop in air filter still had great gas millage.

[have one in my rally car too]
(to try and go back full circle)
Every time i Damage my Rally car exhaust with in 1 day i'll get somone at a tahoe store listen to me pull up. and say something like
Tahoe Kid : "Whoa , you've done some sick motor work huh bro? I bet your subie makes a lot of power huh" (its a stock tired 1.8L) and i'm like "no just safety mods i have an exhaust leak right now"
"oooh ... Suuuuure exhaust leak *Wink* I got you bro... hey do a burn out when you leave!"