Don't hold me to it, but I recall 10mm head bolts.... was 2 yrs ago and I can't remember what I had for breakfast today, so...............................
It is super complicated....... You need to remove 4 bolts, unplug the ECM, plug in the new one, replace bolts
and drive it until the regen finishes. It's on the passenger side under the airbox towards the firewall.
+1 for the GDE software EGR delete, it's just a matter of giving them your injector and vin info, they program a new ECM, you swap and send the old one back. While not cheap, it all but guarantees engine longevity.