Quote:
Originally Posted by FSociety
S58 is the S55 successor according to info on the web and it will be the best of B58 + S55 taken together = S58 first of its kind to be placed on the X3M and X4M
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I think the S58 will also be the same engine used in the new M3/M4 (w/ M XDrive
) with close to 500hp.