At peak pressure for peak torque, you reach the pressures and temps that produce more NOx. Hit google up. When tuning to reduce COx, timing dramatically increases NOx. It's science.
As for changes, there was changes to the inlet plenum/runners to alter air speed for emissions purposes. On the DE model, it has the two different inlet runners that the ECU can swap between too.
https://www.gtrusablog.com/2020/03/itb-vs-single-throttle-individual.html
From the math here and some real world dyno comparisons against a 102mm throttle I doubt it’s worth the effort and expense.
Read this article in its entirety.
https://kelfordcams.com/sole-purpose-of-degreeing-your-cams?srsltid=AfmBOook1TDTA-n6_7S3mRSXD6-NROlytY3aV25ETGP7ns636p3rPJNw
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