Have not heard of these before. Do they have stats on how much the drop is etc?

Just keep in mind that going lower comes with some baggage that may lead you to other expenses that will far outweigh a higher cost of stock height springs. Some people have no issues others have a lot. The biggest being adjustable camber front and back. There is no play with the stock parts so if your camber is out of spec from the drop you have limited options. If you are lucky, you can get by with the MB front camber bolts for minimal cost. If those are not enough the k-mac$ are basically your only option up front with custom/diy camber bars in the back or k-macs again.