This might be a dumb question but why is this pulley only good on 08's built until May of that year? Has there been a redesign of the belt/pulley stem in our motors and been implemented on cars built after May 08?
2008 AW E90 M3 - current
2002 TIAG E46 M3 - gone
1991 DiamondSchwartz E30 M3 - gone but not forgotten