I have a 03 cummins and I want to stack programmers but am a little new t this and need help
On what to look for when doing so
And what two
Should I stack any help appreciated also I need to kno if I can put a 05 radiator in too my 03 thank you

 

What are your goals with the truck? Some kind of insane HP#? I'm kind of against stacking even though I am running a Smarty TNT tune and still have my edge hooked up(its on 0).

 

i wouldnt stack it if u want power build it imo