Originally Posted by rsaca
Hi, I just got an 09 E92 330i Coupe and was wondering what would be the cheapest way to get some horsepower into the car. I want the car to have at least 300hp but I'm new at this. What do you recommend?
Are you looking for more horsepower or more performance? Might want to consider a differential final drive ratio change. Depending on the ratio you choose it could give quite a bit of extra performance improvement.