Review on ACDelco Specialty 504-511: Top-performing Rear Air Lift Shock Absorber for Unmatched Suspension Performance by Jaleel Kadlecik

Started with a set of monro' Air came out because of the seals in the air duct and I sent it back then I will install these. No leaks and they worked better on a lift. They have two seals instead of an O-ring. On the other hand, I've even tried silicone sealant, but to no avail. Here are the ones you need to buy.