Not a good idea to put higher rate lowering springs on ****ty stock dampers than can barely control the stock springs. I'm not surprised it's bottoming now that the springs have settled a bit. You do need to replace the bump stops with something lower or cut the stock ones down an bit.
...and get some real shocks will ya?
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto N/A tune. 100 shot nitrous on BBR tune. Best e/t 11.42 at 120.64
2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP