Yup unfortunately a tuner (which is needed to erase the codes that will be tripped by deleting the dpf/egr) leave a footprint and the dealer will make note.
Bear in mind that they would ultimately have to prove that the product (tuner) CASUED the failure to deny you warranty, bet they have deeper pockets than 99.8% of the consumers out there so it could end up in bad way if you had a fuel pump failure etc...
That being said, after 38,000 trouble free km's on my '11 Laramie, I just had the deletes done and added a H&S Mini Maxx tuner and Airaid intake.
VERY nice improvement in throttle response, builds more boost, and quicker, used to get a fuel knock under full throttle even on stock tune, that's eliminated.. Only 102mi of driving at this point but also only took 3.5 Cdn gal to fill, that's 29.5mpg :smile up:
Anxious for a work trip to see what actual mileage will be, incase this was a fluke of sorts, will chime back in. Pre-mods my best was 22mpg hwy...
2011 HD StreetGlide, 103" 106 TQ
2012 Polaris Assault 800 101 TQ
2011 Cummins 800+ TQ
Torque, it's what moves you...