I used the original Elring 199440 (made in Germany) purchased from
https://www.eeuroparts.com/Parts/627...t-11340029751/
These are the updated new design and are what everyone else seems to be using in all the valve stem seals DIY videos I'd watched- from AgaTools to other DIY youtube videos - and I didn't want to experiment with any other valve stem seals kits including from BMW itself.
Don't forget to get the magnetic valve stem seal installer. It will save you frustrations from using the red plastic installer:
https://www.ebay.com/sch/i.html?_fro...0423+&_sacat=0
The BMW N62 N73 Valvetronic Spring Tension Tool will also save you hours of frustrations when the spring comes off the intermediate levers.