I was also interested in this since I think it's way too low on torque. Since I'm rarely on the track, the acceleration & low-midrange power is where I want a boost, so the top speed loss is a wash for me.
What would you say I should expect in terms of changes in daily driving if I go for this mod? This is the 1st I've heard about violent shifts. I wonder what other tradeoffs there are.
E92 ///M3 in Dakar Yellow, M-DCT, iDrive, 220M OEM rims, Active Autowerke Green filter, Turner Motorsport test pipes, BPM stage 2 tune.