can anyone give me a hint or two on what this is? =]

throttle body

where can i buy one?

are they worth it?
-the only one i found was at www.tap1.org

I bought the one from blau right when I got the car and didn't know any better. All they do is bore out and sleeve the smaller venturi. Looks like crap compared to VAP's.

how much did it cost....

is it hard to put in?

You will answer a lot of your own questions by searching, as they have already been answered over and over again on this forum...

Also, please start your responses in the subject line, it saves us clicks ;]