| I have two of these that are factory sealed still ( never gone into ) until now . This is the connection in question , runs under the lower plenum . 
this is what i saw looking into the pipe .
After seperating the connection . 
After cleaning up the sealant and a little dremal to clean up the factory casting .
On the reassembly I wont go lite on the sealant but will try to smooth out the inner waist abit once assembled before it dries . Dont know of the importants of this restriction , Just thought id share .
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Found this during my reassembly , thought i'd share . - 
