many think CAI is just a cone KN filter on the stock tube....thats not CAI....CAI is having the intake source ( aka filter) relocated to a colder area ( fender well, bumper area etc etc.) to pull COLD air into the engine for combustion. In the 3800 II models you can get CAI boxes which protect the air being pulled in from being heat soaked ( intense, slp, wizaired, thrasher etc etc). mine for example is in the drivers fender , to get colder air.
you are right many people think a new filter and tube on the car is CAI....they are wrong