A lot of Eibach springs (not just for our cars) have the reputation of relaxing/sagging over time. You're likely hitting the front bump stops more frequently than when the springs were new.
What shocks? Worn shocks will also let you hit the bump stops more.
Stock bottom 350, Built by B-Body Performance
NA: 10.98 @ 122
100 shot: 10.35 @ 128
2012 ISSCA SSuperPro Champion
2013 ISSCA SSuperNatural Champion
2013 ISSCA Roadrace Runner-up
2014 ISSCA SSuperNatural Runner-up
2014 ISSCA Autocross Runner-up
2015 ISSCA Roadrace Champion