DON'T lower/stiff spring a car on the stock dampers, no matter what you hear on here. That's back-asswards. Good shocks and struts will make the most of the springs you have whereas harder/stiffer lowering springs will push the stock dampers well out of their meager range.
Do both at once or dampers first.
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 11.38 at 120.85
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