I have a strange feeling, maybe its just my paranoia, but x65.0i felt less turbo lagged, if you know what mean (I had prefactory tune up 7RR package, which were discontinue in 2011). X6M has a huge turbo lag, even in the M-mode.
So here comes the 2 questions:
1) What is the good solution for this ?? Chip it ?? Tune it ?? Or.........
2) Power train maybe different??