ALLLRight....
Here's some specs for you all! The springs are measured at their longest point:
Stock 4 Door Rear Springs are ~11"
The Calmini rear springs that come with the 2" lift are ~13 1/4"
OEM Front Jeep TJ Springs are ~15 1/2"
BDS 2" Front Lifted Jeep TJ Springs are ~ 17 1/2"
If you use Jeep TJ Springs, the FRONT ones are what you use on the BACK of our Track/Kicks.
Here are some comparison shots:
Stock, Calmini, OEM Jeep:

OEM Jeep versus BDS 2" Lifted:

So....
There you go!
Heather