A 2" drop should not require camber links in the rear.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming -- "WOW, what a ride!!!"
Fourgig is right on. My car is dropped about 2 1/2" and was easily corrected in the back with the stock camber adjustments. Don't forget to get a complete four wheel alignment since your whole suspension was taken out to put the Tien kit on.
You will likely experience rubbing of your sway bar and your steering arms so adjust your adjustable end links to make sure they clear each other.