Manufactured by Air lift | 89338 | 2011-19 Silverado/Sierra 2500HD/3500HD AirLift LoadLifter 5000 Ultimate Plus with stainless steel air lines, The Air Lift internal, jounce bumper helps to absorb shock even with zero air pressure! And who doesn't want stainless steel parts? Especially when they protect your system from the road's rage. All the benefits of the LoadLifter 5000 series with the ad, LoadLifter5000 Air Spring Kit by Air Lifts are specifically engineered for hauling or towing heavy loads. LoadLifter 5000 air springs are designed to fit popular vehicles and pickup trucks, motor homes, commercial trucks and other severe uses. Product information updated on 2023-08-21