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      11-28-2014, 12:44 AM   #66
kbrower
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Drives: Black 2013 F30 335i xdrive
Join Date: Jun 2014
Location: Minneapolis

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Would luv to understand the differences between the N55 and B58. As an F30 owner, any improvements in these inline six's are worth the upgrade. Best engine ever developed. I just installed a Dinan tune, and can out-accelerate a new M3 or M4 (but they'd catch up eventually..:-) I see a new 440i x-drive coupe in my future.