03 tx pwr stroke
New member
I have a friend with a 2012 6.7. He would like to get an SCT with Gearhead tunes, but is worried if he has to take it in for any warranty work they will be able to tell that he had tuned it(even if he returns it to the stock tune) and will void his warranty. Is this the case? Does tuning the truck leave a "fingerprint" or anything?