this really helped straighten my sagging 4runner. I could have installed cheap rear springs but didn't want to as I will soon be installing all new high quality springs/damper etc and wanted to save my money until I'm done with that. The sagging of the rear springs leveled the car and raised it a little. Driving behavior has greatly improved. I'll add, at least for 4runner, the instructions are fine if you might have a lift. Remove shock lower bolts, panhard linkage, lower differential, removeβ¦