I'm running them on the back (pics in my build thread). I'm happy with them, but I'm not sure I'd put them on an OEM tub. Keep in mind that the rear flares are just YJ flares. They are rounded on the back side, and with a lip that must be removed to make them fit flush on our openings. Plus, being for a YJ, they won't hit the bottom of the opening equally on both sides without leaving a gap in the top corners.
Because I have an Aqualu tub, I don't have the OEM pinch-seam that provides that CJ-8 fenderwell line that YJ flares simply don't match. Plus, with the Ricochet Rockers, I had to trim the leading edge of the flare anyway, essentially letting me line up the bottom of the flare on the back of the opening.
Bottom line: you can trim them and make them fit, but they won't ever match the OEM lines correctly because they were designed for a YJ.