I looked at their website and there is precious little information regarding what it even includes. The description talks about issues with the front axle, yet the main photo is of the rear, with no fuel tank or finished rear axle. At 479.00, I'm pretty confident it wouldn't include links, the rear axle brackets, pretty much anything more than the middle frame stiffeners. That leaves you with two options, Clayton or Rockkrawler if you're looking for a rear link "kit". Truth in advertising, I've never seen the rockkrawler one in person, but I have both their heavy duty track bar kit, and their steering setup. And I hate them both. The powder coat on both of them was peeling off even before installation, and neither really works very well under hard use. I also however, have a lot of use from my Clayton rear link kit. Bulletproof. Easy installing, was able to keep a full length exhaust with careful routing, and it rides and handles better on the street than a leaf spring Cherokee at any height. I also run their longarm kits on two of my rigs with no issues, which I couldn't say the same for an old Rubicon express longarm I once used. The Clayton stuff is pricey, I don't work for them, but it works, period. This thing looks like a can of worms.
Rich