Review on Upgrade Your Ride with ACDelco GM Original Equipment Rear Air Lift Shock Absorber Kit - Model 515-12 by Jason Guzman

Although it says OE and should be a soft version, they feel stiff on my Cadillac Deville. Far from the original equipment. They hold their breath as expected. Update 2018: Now after driving a few miles the rear end jumps when I go through a speed bump. I've had Arnotts before and they worked perfectly, very smooth with no rattling. I could replace that with an Arnott as I don't like the ride at all.