I run a electrical Autometer 30 lb psi. It is taped into my MITUSA fuel filter port. It is for the lift pump. I can adjust it to any psi I want. I run about 9 psi at idle and 14 at WOT holding all day. I have heard that Di Pricole IIRC has a rail psi gage for the Dodge and its a 30,000 psi . I think with some creative thinking it could be used on a D max. They both have a common rail system .