Have a Sherpa rack and bought a couple extra crossbars. Mounted them to the bottom of my Smittybilt RTT. Biggest pain is getting the RTT up there (2 taller people) then it just drops onto the rack and bolts into the crossbars. Simple
I had Cam at Camtuning do my tune and very happy with it! Cam provided initial tune then grabbed datalogs for him to tailor it to my truck and what I was looking for. Good guy to work with.
Towed my SxS (~4000lbs) through eastern KY/TN at 70+ and Trans temp was normal. Gas mileage was about the same as my 21 but power was much better. Handled it no problem vs 21 would be in 4th or 3rd gear screaming to try and keep speed up the hills