The Rough Country 6" bracket lift kit for the Ford F250, F350 Super Duty includes front coil springs, radius arm drop brackets to allow for properly set caster, sway bar link extensions, trac bar relocation bracket, brake line relocation brackets, pitman arm, steering stabilizer relocation bracket, rear block kit with add-a-leafs and 4 RC Nitro shocks. Shock boots sold separately. The Rough Country coil springs match OE coil rates and are specifically designed for Gas motors. The included heavy duty trac bar bracket properly centers the axle and matches the steering angles created by thedrop pitman arm while the radius arm drop brackets maintain the OE caster angles. A steering stabilizer relocation bracket maintains proper steering control but a Rough Country problem solver single unit (87322) is recommended with larger tires. A Rough Country dual stabilizer (87941) is required when running 37" tires.