GMC 3500 Sierra 2011- 2025 HD Kit

Get the best of both worlds with this authentic RAS® Heavy Duty RoadActive Suspension kit -- the only solution that strengthens leaf springs by up to 50% while providing a more smooth, controlled ride at all times. Unlike other suspension upgrades that need constant adjustments & maintenance or negatively impact unloaded ride, RAS® eliminates squat, excessive bounce and body roll-- without hassle or sacrificing comfort . This 3-in-1 system offers the benefits of a helper spring, sway bar, and traction bar at the fraction of the cost of other upgrades. With a quick 1-hour installation and zero maintenance, it's the simplest most effective way to reduce squat and improve your truck's towing/hauling performance.  Beware of cheap knockoffs -- choose the original, proven RAS®. *If your truck does not have factory top overload springs, expect 30-40% increase suspension strength. *If your truck does have a factory top overload: it must be removed and RAS® HD will provide a slight improvem