GR8TOPS warns that if you don't use the rear sport cage down tubes, the OE vehicle safety rating is lost. They supply instructions and gaskets so the OE down tubes can be utilized. A suspension system, larger tires — pretty much everything we do to these vehicles causes them to lose their OE vehicle safety rating, so we like what was done here. An OR Fab front cage was added to the main sport bar, making the LJ much safer than it was stock. As the down tubes do add support that helps the body's torsional stiffness, reinforcement panels under the body were added. Aftermarket crusher corners or rocker guards also add to the body's stiffness. In this photo, the sport bar padding hasn't been reinstalled yet. The hardtop attaches to the windshield with adjustable tension cam latches and to the side bedrails and bulkhead with included bolts, washers, and nuts.