2025 Chevy/ GMC 1500 | 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 smoother, more controlled ride at all times.  Specifically engineered for the 2025 Chevy Silverado 1500 and GMC Sierra 1500, this latest RAS® model (Part #5611-TZHD) is built to complement the new rear suspension design — delivering unmatched load stability, squat reduction, and ride quality improvement. Unlike other suspension upgrades that need constant adjustments & maintenance or negatively impact unloaded ride, RAS® greatly reduces 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 a 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 and hauling performance. Tried a