I've seen way too many threads asking about these parts, so I'll create a new thread and make it a sticky.
Please note: If you haven't replaced these parts, they will crack and blow coolant everywhere. If you drive your car while this is happening, you will overheat it and warp the head. If you car overheats, DON'T DRIVE IT. PERIOD!!
#9 in this picture:
http://www.realoem.com/bmw/showparts...61&hg=11&fg=15 #1 in this picture:
http://www.realoem.com/bmw/showparts...58&hg=11&fg=10