Originally Posted by kamek
I was starting to think I was crazy for thinking the tune didn't do much for my N51 328xi...
Hmmm maybe the N51 responds a little different to it and takes some time to adapt
. I was a bit skeptical after reading your review but I immediately felt the difference with the tune and it exceeded my expectations in terms of power. My first impressions were that this is a bit more than 15 hp. I will try to get a dyno run within the next few weeks and Ill report back with the results.