The stock rear shocks on a 15-20 F-150 aren't great. The back end of my truck was pretty floaty and bouncy after 30,000 miles. Ford apparently went lowest bid on those and to their credit a lot of people probably won't notice or care when they start to go. Instead of getting the same lousy shocks under warranty, I installed these. They're a super quick swap - just make sure you have an 18 mm socket (I only had one, most of my sets skip from 17 to 19).The ride is dramatically improved. It's firmer and more composed in all situations.