Originally Posted by rbaldwin28
The N55 has a Cast Crank Shaft and the N54 has a Forged Crank Shaft. Suggesting to some that when people start finding the power limits of these motors the N54 will be able to handle more. I think the best 335i is the 07-09 with the N54 because now if you buy new you have to get a 335is to get the N54.
Before the crank shaft goes, a lot of other things will blow up first...
I think the best 335i is the one driving and not the one standing at the dealer...
We are 0,1 % of people that are in search for max performance! For all the rest, the change from N54 to N55 was a step forward!!!