PFADT Great Customer Service!
I have a 2010 V6 Camaro and bought lowering springs for it a couple years ago. Well apparently the early gen V6's had longer struts and were not compatible with PFADT (gen 1) springs for the 5th gen. I contacted PFADT last month to see if they could help me, even though it had been almost two years since I bought the original springs. They sent me replacement rear springs free of charge.
Got them installed and they fit like a glove.