Keep the rear axle planted and prevent axle-wrap in your 2017-2019 Ford F-250/F-350 with theÂ Cognito 120-90471 SM Series Limited Dynamic Geometry (LDG) Traction Bar Kit. With the unique ability to work with the movements of your suspension, the LDG Traction Bar Kit eliminates suspension bind for a smooth ride. Cognito engineered these bars to allow quick and precise adjustments while installed on the truck - no need to drop the bars! Delivering both optimum performance and a unique, signature look, the SM Series Traction Bar Kit will surely make your truck stand out in the crowd! These traction bars will fit on trucks with up to a 4.5" rear lift height. Features: Fits 0"-4.5" Rear Lift On-Truck Adjustability Boxed Sheet Metal Construction Heavy Duty Brackets and Hardware Semi Gloss Black Powder Coating Made In The USA!