I didn't mean all internals, should have mentioned in previous post. the crank an Some have rods an pistons. A few reputable people have torn down there engines and confirmed it. Also if the N55 is the better engine then why is the 1m an 335is N54 powered? now you did say stock for stock...
2008 Bsm E92 335i - FBO -E85--------Sold
2014 BSM 335i Msport - Stock