Quote:
Originally Posted by OTN55
from the looks of the pics both the n55 and n54 cranks look like cast metal....
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This has been hashed and rehashed many times over. N54 is forged, N55 is not(its cast). BMW wanted to lower the cost of the N54 power plant and that's how we got the N55. But the N55 has more power down low and better fuel economy. Just like the B48 is now the new king of inline sixes.
Dackel