This is the Rubicon Express (R.E.) LJ 5.5-inch five-bar long-arm suspension system we ordered. All the parts came packed in boxes that were both clearly marked and well-isolated with packing material to ensure a trouble-free install. Rubicon Express has been designing and manufacturing Jeep suspension and performance parts for well over a decade. Because of the close proximity to the Rubicon Trail, all of its components are well-tested for trail durability and on-road worthiness. Some noteworthy features include 4130 chromoly control arms, serviceable Superflex Joints and Grade 8 fasteners.