There's nothing that requires you to delete the EGR or DPF on that truck, 95% of that year model truck on the road are completely stock and run just fine, yours will do just fine that way also.
That's true. Most people aren't gear heads and don't mess with their trucks, they don't know the difference. The EGR just recirculates exhaust through the engine. With miles the intake system will build up an astonishing amount of greasy crap. More than you'd ever think possible, but the truck will run ok. That DPF is something else.....it's the one to get rid of if you want immediate results. One friend was getting poor mileage with his '10 Cummins. A new exhaust shedding about 200 lbs of DPF system, along with an Edge tuner, made a big improvement in mileage and power. This was a couple years ago before EFI was available for Cummins.
