Originally Posted by edwinm3
get a software tool that you can revert back and forth from stock to the tune. As long as you dont touch the rev limiter and speed limiter you'll be fine. Software really makes a difference, you think it sounds nice now wait until you get it tune, it makes it sound a lot better and the smell wont be as bad
You know that was what I was thinking. However, say the motor has some sort of issue. I'm pretty sure BMW can detect a tune, even if you dont touch those things in the shadow memory. The funny thing is I dont even drive my car hard. Im averaging 19mpg lol.