I have the 2.5 Fox coilovers and 2.5 shocks in the back. Street bumps feel almost nothing. I was going at 50-60mph at river washes in the middle of a desert. It gives you a precise handling at high speeds. Also, you can take the system off and take it to the Fox factory for an overhaul. It was very expensive but I decided to do it since it was going to be my first and last brand new truck in my life. I am getting more than I expected. Im sorry for my bad English...