that was my concern, i.e. what if the tune showed up good but not quite as good as it could be. If I understand correctly, you offer free tunes until the original tune is dailed in for the parameters given (approx45 days). Then any re-tune due to added mods etc. are $50 bucks, does that include shipping?
thanks, got any hard #'s for the 4.8, 5.3, and 6.0?