Fair enoughIn my experience with this kit I've not seen a front drop as small as that, usually closer to 100mm. As with any coil over kit though, the actual drop varies depending on the weight of the van to which it's being fitted.
There isn't an advertised minimum drop that I've come across, but in any case, the advice remains the same, it's not a kit for those looking for moderate drops, it's for those looking for extreme lows.