[simoneves]

I'm surprised that there isn't a thread or two about this here...

I have a 2016 228i N20 with a Dinantronics SPORT set permanently to "Race" mode (+4) on regular California 91 gas.

Tempted to switch to BM3 OTS Stage 1 and wondering what the differences (and hopefully improvements) will be. I am happy with the performance of the piggy-back but wish it was a bit smoother in the mid-range.