Originally Posted by Rekrul
Dont remove your top speed limiter
Dont increase your rev limit
Don't remove cold start(debatable)
These are three easiest ways for BMW to see if you have had a tune. So if you flash back to stock, there should be no red flags whatsoever.
Does the ESS Akra tune increase the rev limit or remove top speed limiter?
Or is this something that you have to specifically ask for?