Tuned vs untuned video
So dyno info is nice but any tuned m3's have video's against stock m3's with the same mods or lack of mods. ie. both catless, air filter etc with only difference being one is tuned and one is not.
While I believe the dyno gains, I would like to actually see what this equates to from a rolling race. Just curious what 10-15hp looks like in action