Lowering on stock dampers is never a good idea and I won't bother explaining why here, I know it's been discussed before on this forum.
With this kit, TCKline is just responding to market demand ie people who want to retain EDC for whatever reason.
And before anyone argues about the kit (or another) being the best because this because that: it doesn't matter. It doesn't matter if the components of the kit are made out of platinum and diamonds. At the end of the day you're on stock dampers, a far from optimal setup and you're just wasting time/money.
If you absolutely must then just get a set of Eibach springs (very mild drop like .6 in) and camber plates of your choice and save yourself ~$600. Oh but it's not adjustable? Again it's pointless to have threaded collars to go low on stock dampers.