Interesting.I don't know how the 359Ms are made, but when the E46 M3 ZCP came out BMWUSA said those wheels were forged. They were not. Numerous customers contacted BMWNA to point out that their "forged" claims were incorrect, but AFAIK they never corrected the false claim. BMW Germany never made that false claim.
I chalked that up to a sort of corporate "we cannot admit we made a mistake" mentality.
But forged wheels are generally considered more desirable and more expensive. At www.bmw.de, the optional 19" 220Ms are labeled as forged, but the 359M are not.Interesting. Forged wheels really are not much benefit for the street driver as Chris stated.