I don't know of any factory cat installs......but I do know that there was some factory ok'ed installs using John Deere diesel engines......so who knows anything is possible. My dad and I had looked at some of the JD installs when they were doing them.....because of the weight and noise factor they could only run 4 cyl. with a turbo in the pickups and was installing the inline 6 in 2 ton trucks. It should be one mean son of a gun. Go for it and let us know how it works.