Duramax power mods
 

I have a 2013 Duramax am looking to add programer and cold air intake what is the best products for this motor?

If youre looking for a tuner with gauge display id go with h&s or edge. You might could also do EFI live tunes with an edge insight for tune selection and gauge display (not sure about year model coverage). Custom tunes are best way to go in my opinion. S&B intakes are a good piece for a good price.