Originally Posted by Cobb Tuning
The dealership cannot void your warranty because of a certain modification, they can only deny warranty claims on a case-by-case basis if there is reasonable argument that the modification may have contributed to the failure in question.
I agree, but in the dealerships sense, you are guilty until proven innocent, because they just wont work on your car. Coming from a VW, i know all too well about them not wanting to do warranty/recalls on a "modified" car.
Based on the graphs on your site, it is pretty much self explanatory: a tune is helpful to control lean A/F ratios. I guess i have no choice but to join the Stage 1 club.
EDIT for my ****ty grammar...