Quote:
Originally Posted by Holander
Actually at least S50, S52 and S54 engines are pretty different than M50-based M52 and M54. S-series didnīt share same block, crank, pistons, head, intake manifold etc. You can check it in Realoem.com.
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It's no secret that the S engines were "derived" from their non-M counterparts. That doesn't mean the same exact materials have to be used.