Anyone know what this part is supposed to do. It came with some parts I bought. Looks like in might fit inside air intake elbow.

 

It's a throttle body air foil. It sits inside the front of the throttle body and is supposed to smooth out incoming air.

 

It's a Klingon pocket knife.

 

http://www.ws6.com/mod-4.htm

I wouldn't pay full price for one but I too got one used with some other parts and used it on my wagon(actually a few of them. Wont claim I noticed a gain from it specifically but I did it with a few other things.

 

http://www.ws6.com/mod-4.htm