Originally Posted by subarujay
Exspecially changes when cars get some mile on them
That is something a lot of people also dont think about, and it affects you at ANY mod level.
Say you go stage 2 at 10,000 miles.
Then you put 50k more on the car. There is a 100% chance your tune is off, even if you maintained it. Most likely not majorly off, but you can definitely re-optimize to compensate for changes.