Looks like Ford made some updates to the GT350 (Non R)
https://www.roadandtrack.com/new-car...little-tweaks/
Looks like the tweaked the MRC, new tires, and revised aero. I wonder if the reason for that is the PP2 got to close to the same performance.
I have said that Ford doesn't care if the pp2 was close to stepping on 350's toes, but that was also when I thought for sure that the 350 was going to stop at model year 18 as it was basically a full carry over from previous model year.