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      12-14-2013, 11:13 AM   #72
mkoesel
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Drives: No BMW for now
Join Date: Jun 2006
Location: Canton, MI

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My mistake on the crankshaft - I remember reading debates on the topic with people who had torn them down claiming it was cast. Perhaps there was a change later in production? That would not be unheard of.

In any case the S55 has a forged crank either way. Not sure if it is a new design or a carry over from the N54.