Originally Posted by ermis27
Please guys if you don't have any suggestions on the above matter there is no need to say: buy the sdrive20i or the sdrive bla bla, it is really annoying. The question was clear.
Thanks for your opinion, but I disagree. My comment may have been short, but it is valid and sensible.
Your suggestion may increase BHP by around 20HP, that will be virtually unnoticeable considering the money spent doing it. If the OP is going to spend a lot of money trying to get more power, it would make sense to trade the car to something more powerful which is a much better use of the money surely?