Up to the flash it is a very normal bearing you can find at TKO, Boca etc. for much better prices. The keep-on and the Virtus has a small edge in the cranckase and need to fit a bearing with a smaller (in width) inner brace. Handy people can mill out the edge from the crankcase and fit a normal bearing. I truly believe this has no real technical function than only protecting their after market in bearings.

But probably other RC bearing manufacturers have made a ready to fit bearing for these latest model engines. Just look arround.