in between the block and the oil filter on a 91 accord is a little metal housing with 2 coolant hoses going to it. what is this piece called. the one on my freinds car is miossing the oring and I need to be able to describe it to the parts store.

 

inter cooler 'O' ring.
I doubt the parts store will have a listing for it, I've always had to get them from the dealer.