I just did the ford performance one because it looked better, but I did need to trim the passenger side back corner to make it fit
View attachment 41190
https://www.oemfordpart.com/v-2020-...--3-5l-v6-gas/engine--engine-appearance-cover
Nuts = 10mm
@03Cobra click on the attachment above, its a Ford performance cover on a Expedition.
https://www.expeditionforum.com/threads/2021-question.46825/page-6