rightwinger

I am attempting to figure out what thread size or NPT will fit this T on a 2002 24V. I want to screw a fitting on to it so I can route the injector return and the VP return another way. I have called cummins dealers, they have no idea and had no idea how I could find out, I called the cummins company and spoke with a tech, and they just transferred me back to a local cummins dealer. If anyone has one laying around and could see what size female NPT will thread onto it I would be extremely grateful. Thank you