While not to the same state of tune... I loved the n55 in my e90 335iX - should've kept that car. It really was an awesome engine for the 2011 to 2014 era. It was decent in my 535i, but the b58 in the 340i is a good bit better, not just better numbers, but more revvy and fun. In this day and age, I'd be looking for something a bit stronger in my M car...
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