Helper Spring Kit; SuperSprings; For Use With 2007-2011 GMC W3500/W4500/W5500 Leaf Spring Design; Rear Upper; 3 Inch Width; 6000 Pound Load Capacity Per Set (Not To Exceed The Gross Vehicle Weight Of The Vehicle); Steel; With 2 Springs and 4 Shackles/ 2 Poly Spring
SuperSprings are a unique and patented self-adjusting suspension stabilizing system for vehicles with rear leaf springs, designed to level loads and reduce body roll. SuperSprings provide users extra load support and reduce body roll without compromising ride quality. They are manufactured using a variety of different sized springs to support multiple applications. All SuperSprings are manufactured in the U.S.A. from SAE5160H high grade, shot peened steel.
