This system covers all the bases. Lift is achieved via replacement coil springs that are pre-set (fully compressed and stressed) during the manufacturing process to minimize settling. The system also includes front and rear anti-sway bar links, a rear track bar extension bracket, longer bump stop extensions, and a transfer case lowering kit. Coax the remaining twist out of your TJ by installing Superlift Rockrunner links in place of the one-piece factory axle-to-frame links. Superlift's swivel-link design has numerous advantages over other types of replacement links. The most common competitors' links are one-piece tubular units with some type of pivoting eye bushing (like a Heim joint). Superlift's primary advantages are a longer service life, less vibration and shock-load transmitted from axle-to-chassis, and link length is adjustable so driveline and steering alignment can be dialed-in. These things matter. If you cannot spring for the whole load at once, we suggest this upgrade sequence: 1) lower links for front axle, 2) lower links / rear, 3) upper links / front, 4) upper links / rear. With the Rockrunner goods in place, your suspension is "dialed". Rockrunner links will work with most name brand 4" to 6" TJ suspension lifts