what year was the first year that the T660 had EGR??? And is a 660 relatively easy to work on for a semi????
Every truck (except Cat powered) from '04 to and including '07 had EGR. The first T-660 was an '08 if it has a Cummins in it has both EGR and DPF, if it has a Cat in it has DPF and Acert technology.