A lot of people call any aftermarket intake a CAI. A real CAI will generally put the filter low, usually right behind the bumper in front of the wheel so it actually pulls air from outside rather than next to the engine bay. A short ram just puts the filter in the engine bay and might include a little heat barrier that may or may not do anything at all. A short ram will almost never improve performance (but can sound good!) and a low-mounted filter in a Jeep just strikes me as asking for trouble.
Originally Posted by Wavedatya
If you want more practical air intake and have it look cool with a bit more practicality get a snorkel. It Sits high and away from engine bay. The front of a jeep isn't really designed to force air into an intake. A snorkel would force it a little more. But don't expect better MPG or HP.
The vacuum created by the engine outflows any "forcing" action you'll get on these vehicles. That 90s Trans Am Ram Air hood looked awesome, but you'd need to be well above street speeds for any actual ram effect. I want to say it was in the high 90mph range, but it's been so long my mind might be throwing numbers out there.