I have been using KYB products since the late 70's. I never had any complaints. In fact, all of their suspension products work great! These upheavals are no exception. I installed them on a 2002 Ford Ranger 4WD. I wanted to pull a pair. My Hellig booster springs just overpowered the old Ford shock absorbers. Not these, they work great! Trailer and truck now feel absolutely stable.