Three years ago when I did all the mods on my 05, one of them was installing the Ford racing suspension pack from AM. This lowered the car 1”. Now, the back end is sagging and hitting the bump stops. Yes, they are shorter than stock to accommodate the lowering. This tends to happen after the car is completely warmed up. There is only 7-8K miles on the springs and shocks and the car is not a DD. It only goes to shows and track days. In fact, the sagging started after the last track day on 6-1. I just tested it. I sat on the trunk ledge while the wife watched the bump stops and they are definitely hitting. Do I replace shocks, springs, or both?