Hardrace Rear Lower Arm V2 Adj Lift 0-4.5" w/Rubber BushUsing factory control arms on lifted cars causes axle housing to rotate. This not only affects suspension articulation but also results in poor driving stability and vibrations due to altered caster and pinion angle. Adjustable arms help set axle to factory alignment spec for greater handling performance and lifespan on the propeller shaft u joint bearings. The arms are well known for its high strength steel tube construction to withstand harshest off