You have rattle on startup?I've had the waste gate rattle on my 2019 for a few months, dealer is aware. Did the 21N08SB2 in August. Had a very harsh cold start last week, the next day I took a video of the cold start and sent it to my SA. Have appt in two weeks for them to dig into it. Based on the interwebs, the cam phasers will be replaced. My truck is Ford CPO, bought at 14K, have just shy of 52K on the clock.