Alright I PM'ed a few people about this, and I just wanted a little more info.
Here is the story: I got my Injen CAI
installed a few days ago. But when me and my friend were doing it he uninstalled this long bit of black tubing. Now when we installed the CAI
and hooked everything back up, but he didn't replace it. But then looking at the instructions I see that it is supposed to be cut then reattached. I've been driving around for a while with no known ill effects. Could you tell me just what is this part and what does it do? Have I harmed my car by not having it reinstalled? I am planning on getting it reattached today I just want to know a little more about it before hand. Here is a picture with the missing part marked. I suppose this is how it should look.