It's an intercooler plate.  It just houses a heat exchanger inside those plates.  I think tomorrow I'm going to buy some either JB weld or something to that type and see if i can seal it.    
Then I was going to tap it in several places and bolt it all together.    
New, they run $300. If I can get it done for $50 I'd hit it.  If not, then $5.00 it is .