I bought a CAI off ebay and all I got was a couple curved tubes and a filter. I had to go to Autozone and stick a nasty exhaust extension on there, but I finally got it to just barelly stick out from underneath the car. When I'm in a garage its so freaking loud, I love it.
When I first installed it I didn't take into account that driving would put force on the filter, so less than 30 seconds after taking it for a drive, KABOOM!!! bye bye filter. Somehow the truck behind me that ran over it didnt seem to hurt it too bad, so I just stuck it back on and ziptied it and it hasnt fallen off again yet!
Before I got this I took off the stock intake and stuck a filter up there, and I don't know if it's just my imagination, but my car seems to take off a lot faster once I get going. w00t w00t