Would I have to completely change out of 2.5" TF lift with adj. LCA's to run this or is it just a shock change?
I can see do it either way. It's easier to sell a complete used kit than one that is missing parts. Also the PreRunner kit uses 3" 4dr/ 4" 2dr coils. You can do a LA upgrade, add the shocks/SpeedBumps and swap everything little by little. But that typically can cost you more in the long run.