Rockhard 4X4 Parts RH1030-SFH4 Straight Harness Bar For 4Dr Jk 4Dr. The RH4x4 Jeep bolt-in Sport Cage is the cornerstone of Rock Hard 4x4 products. To save weight, and save solid axles, the JL engineers installed a very light weight, very thin wall (14 gauge), very body-integrated cage system.
