I bought the Mopar trifold for RamBox (# ends in AC). I’ve had it 6 months with no issues. It’s made by BakFlip. Instructions were exactly the same pictures as I found online for BakFlip. Fit is excellent. I added 3/4 x 3/4 weatherstripping along the ends of the RamBox where the tailgate closes. Before that I got a 1/2 cup or so of water in the corner after a good rain or car wash. Now it’s just a trickle. I have 1/4 bedmat from Tractor Supply, so a few drops that get through run under the mat. I get a lot of positive comments from other truck owners with other types of tonneau covers.