The center holes need to be opened up a little bit on the first gen trucks, but I haven't had a go at the second gen so I'm not sure. For what it's worth, I needed my 18" 5-spoke Titan wheel center holes bored out to be 94mm diameter by 10mm deep. My first gen truck has a 3" static drop and there are no fitment issues. I hope this helps some!

-RHP