TheÂ Cognito 110-90589 Tubular Series Limited Dynamic Geometry (LDG) Traction Bar Kit delivers optimum performance and a unique look for your 2011-2019 GM 2500HD/3500HD. Featuring heavy duty 2" round tubing, the Tubular Series LDG Traction Bars gives you the ability to precisely adjust your traction bars without having to unbolt them from your truck. The "hinge" design allows the traction bars to move throughout your suspensions travel, eliminating both axle-wrap and suspension bind. These traction bars will fit on trucks with up to a 4.5" rear lift height. Features: Fits 0"-4.5" Rear Lift Eliminates Axle-Wrap On-Truck Adjustability 2" Tubular Steel Construction Heavy Duty Brackets and Hardware Semi Gloss Black Powder Coating Made In The USA!