Hello fellow Titaneers, I am sure this has been covered in the past but I tried searching here with no luck. I am also a noob to this site so that search may very well be user error. I have a 2015 SV CC 4X4 and I inquired with RC if installing their 2" leveling kit required UCA and/or end links as well. They responded that as long as my truck was not a PRO4X I did not need them. My question is, what is the difference between a non-PRO4X (S, SV, SL 4X4) application and a PRO4X application? I thought that the only difference between them was that the PRO4X came with different struts up front but nothing more. Can someone please enlighten me as I am slowly getting to know my Titan and the differences between models. Thank you in advance.