hi guys, sorry for my english, i'm from belarus, i need this thing for my buick regal 1991 3.8, help please, i can't find it.

 

It appears to be an intake manifold vacuum junction. Are you replacing it because of the small hole in the part? That has to make some noise with a vacuum leak at that hole. If that is the reason the hole can be sealed with any type sealant that will stand up to the heat.