Lol, without exact conditions the emissions of those engines is N2O. That should make us all seem real happy...
Those engines have SCR reduction catalysts that specifically target NOx to N2 every large diesel does to meet international NOx limits. Do you know what the chemical redox is used to drive the reaction. Its called DEF diesel exhausts fluid and its UREA which is broken down ar high temps in the exhaust system to ammonia. This engines will already have the ammonia needed to run the SCR cats in the gas stream. These engines have already proven lower total NOx emissions than the diesels they will replace. Read more from those engine markers they habe white papers available with the data you seek.