2017-2022 Super Duty Radius Arm Drop Brackets 4.5"-5.5" Lift (CS-FRAD-17)Restore proper handling and steering geometry to your lifted 2017+ Super Duty with Carli Suspension's Radius Arm Drop Brackets. Lifting your truck alters the factory caster angle, resulting in vague steering and a tendency to wander. These heavy duty brackets are precision engineered to lower the frame side pivot of your radius arms, correcting the caster to factory specifications and delivering a stable, predictable ride with improved steering feel.