Air Lift 8513 self leveling kit. This kit came off if a 2002 Chevy Silverado HD. There is nothing wrong with the system, just when I had the lift kit got put on my truck they took them off. I used them for when I pulled a camper. I checked with the the 4 wheel drive shop that puts my lift kit on and they told me what a fair selling price woud be. I have attached pictures if you have any more questions call . It is complete bolt on kit.
Location: Bowling Green, Oh