The Rough Country 6" lift kit for the Ford F250, F350 Super Duty features engine specific coil springs matching OE coil rates. Also included are radius arm brackets, trac bar relocation bracket, extended sway bar links, extended brake lines, pitman arm, steering stabilizer relocation bracket, carrier bearing bracket, a 3" rear block kit and a pair of rear add-a-leafs with 4 RC Nitro shocks. Shock boots sold separately. This combination of components using the heavy duty trac bar bracket properly centers the axle and matches the steering angles created by the supplied pitman arm while the radius arm brackets maintain the OE caster angles. A steering stabilizer relocation bracket maintains proper steering control, but a "problem solver" 87364 is recommended with larger tires and a dual stabilizer is required when running a 37" tire.