Mod for 2013 cab & chassic flatbed
 

Can u remove the def system

Not at this time I believe. You would have to fool the ecu into thinking the def is still there, and there isn't programming out for that right now I think.

Thanks Iam looking at buying one I drive a big truck with def on it does ok as loug as theirs not a lot of idle time

yup, I work on big trucks to.