The only thing I can tell you is, Injen intakes run lean period.
That's not true (I have one with absolutely no problems) and putting fuel injector cleaner as you know injencelicagts won't do a damn thing for anything. Maybe it's the open exhaust that's throwing around some CEL's? You know as well as well as I that it's not the Intake
. You alredy stated that you have an "open exhaust". That's the ticket there. Pull the codes regardless and see what they are.