This Rough Country 3" Series II lift kit for the Ford F250, F350 Super Duty consists of 3" front coil springs with track bar bracket, radius arm drop brackets to allow for properly set caster, a rear block kit and 4 RC Nitro shocks. Shock boots sold separately. A dual steering stabilizer is strongly recommended. Proper caster is crucial to maintaining factory handling and driveability. 100% bolt on installation.