I have a 2012 R/T and I purchased Long tube headers and a new exhaust kit. I was told I will need a "tune". What does my installer have to do to "tune" my vehicle? Can this be done with a Diablo Predator tuner? Does my vehicle have to be run on a dyno? I understand that the Long tube headers will throw a code and will cause the check engine light to come on. Kind of new to this level of upgrades so I apologize if my questions sound dumb.