Fabricated Duct to Oil Cooler Plenum

I trimmed down the 4″ SCAT tube so that it fits between the back of the baffles and the butterfly valve on the oil cooler plenum.

I then positioned and drilled the flange to the back of the baffles and then marked and cut out the hole in the middle.  It still needs to be filed flush with the inside of the flange and then it can be installed with some stainless steel screen and RTV.