You need an extra arm putting in the upper seal and pan. I asked some questions regarding the VOE set up. My info which came from Kirban and sources some 12 -15 years ago may not be correct. I spoke to GTO_Don who asked Jim M about this topic it seems you could get both options together. There is even a RA IV that has the VOE and Ram Air options. It was such a short lived option due to states complaining about noise levels that many people did not know about it. What a killer option to have on a Judge!