It looks awesome with 33s, if I understand him it's just got rearched front springs. The shackles are pretty short too, that would be an easy 1" lift. I read that the springs are YJ width but not length.
They retune the diesel:
Looks like Jeep is trying to get rid of them: https://www.motortrend.com/news/jeep...dra-roxor-u-s/