If the o-rings and seals you need are on the outlet tube, the ones in the drawing I posted are correct except there is one on yours that's not listed, 3058653 O-ring. It calls for one. These are the ones for the outlet pipe:
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I went through the forum registration just to thank you for this. I also ran into the issue that this single O-ring isn't shown on any EGR or cooling diagrams! I was having a hell of a time finding the part number, but here it is thanks to you! I'm here because my EGR cooler is leaking where this o-ring is on my stock 2016 2500 (not cab & chassis).