I'm changing to one of those chrome air filters for my 3A engine'd trueno and when I took off the air cleaner, there is this part which I'm not sure what it is:



As you can see from the second pic, there is a tube which leads to the exhaust side of the engine so I'm guessing that it's related to exhaust...below the air cleaner there is a tube which vents into the carb:



Is this the EGR and if so can the tube be welded shut or something otherwise is there a method to mount this to the chrome air cleaner?

Thanks