I just purchased a 2012 4720 cab model. I purchased the 3rd valve kit, as well as the 4th & 5th valve kit and installed them myself. It was a bit of hassle but JD110 helped me out with a change up line that was not included in either kit. All is working well right now, however my 485 BH just arrived, which I am also going to install myself. I got the PBY kit, and it will install just fine, if I didn't have the 2 additional EH valves installed already. This is due to the hard lines that come with the kit. My dealership is not too good with doing any research on this type of stuff. Does anyone know the part number of the hard lines needed to install the PBY kit when the 3 and 4/5 kits are already installed?