These bags made a world of difference to my truck. 18 z71 with front plane and +1" blocks in rear hauling 8800lbs had a serious squat before I put these bags on. Now I can raise the air to the level without any problems, the driving characteristics are excellent, the handling even better. Installation was a breeze. , about 45 minutes in my driveway with a few hand tools, but I work these trucks every day and I already have bags installed so I have the experience to speed things up.