Iv got a guy who's looking for a tuner to calibrate his spedo along with adjusting for the new gears he's installed, whats the options as far as a tuner/programmer goes. Its a 2011 2500, im a novice when it comes too a cummins maybe y'all can help me out.

 

my smarty works great for the tire size but im not sure on the gear i would think it would work though