Originally Posted by mangotangoe
I've had the stage 1 for the past year and just recently had the stage 2 installed. I dont have anything else to compare it to, except a jb4 on my previous 135i. However, car runs very strong and seems even smoother with the update. Only wish we had better gas locally...
If you opted for the optional "Race" file, I encourage you to try some water-methanol injection. We run it on all of our sponsored racing cars, as well as on our in-house N54. It certainly yields nice gains!