[Liquidpaper]

Originally Posted by Sindarin

From the F22 Complete vehicle training manual:


If you take the time to look at part numbers you will find the F22 M235i has a unique crankshaft (11212334334) AND piston (11258619196) part numbers compared to ANY other N55 (E90, F30, E70, F15, F10, F25, etc..).
Standard N55 crank-11212163665, piston-11257624409

Since BMW makes a spec M235i Race the forged crank is possibly meant for homologation standards. Or since it is a 'M' inspired enthusiast car, that BMW realized would see a lot of track time from owners, BMW wanted the best parts installed for durability purposes.

Thank you!