My friend had a set of 5th gen trail springs, so I decided to try them out since I was swapping out the shocks and struts anyway. So far I have only done the front with 5100s set at .85. I seem to have gained between 1.25-1.5 inches. Im still debating doing the rear because it has a nice stance as it is. I am clearing 265/70/17 KO2s on 2015 SR5 wheels without any issues.