the good one was the 2007 n54. Which was the first year for it. BMW sent those over and they were underrated for HP. They were Somewhere in the340-350 stock but detuned the next year in 2008
our B58 is ultra smooth and quick. Has the Power Pack 2 and it runs well.
I still think our N55 has more power but I think the gear ratios seem like it does.
Wifes old escalade with the 6.2 was a sweet motor, ran well, good fuel economy and never had a hiccup. Will See how well my new 6.2 does.