TheÂ Cognito 110-90584 SM Series LDG Traction Bar Kit is the evolution of traction bars for your 2011-2019 GM 2500HD/3500HD. This new design was engineered to provide the ability for quick and precise adjustments to minimize axle-wrap without restricting your trucks suspension travel. Everything about these traction bars screams heavy-duty! The boxed sheet metal construction delivers optimum performance as well as a unique look that will surely make your truck stand out in the crowd! These traction bars will fit on trucks with up to a 5.5" rear lift height. Features: Fits 0"-5.5" Rear Lift On-Truck Adjustability Boxed Sheet Metal Construction Heavy Duty Brackets and Hardware Semi Gloss Black Powder Coating Made In The USA!