I have the leveling kit from trail duty. Its basically made up of bigger bump stops and extended bilstein 5100 shocks. You use your stock keys to level the truck. But with other kit that include leveling keys also include shock mount extension. Those kits you will experience the front dipping under hard breaking. With the trail duty kit the bigger bump stop prevents that under hard breaking plus the extended shock is all one piece, there no worries about extensions breaking over time.. Just my opinion though
