Any S50B30 manual sedan owners here?

According to the registry, it's so rare.

ECE sedan (LHD): 868 produced from 09/94 through 07/95
ECE sedan (RHD): 415 produced from 12/94 through 07/95

As far as I know, there are NO S50b30 sedans. Sedans were only a 97-98 thing, I believe just for the USA and they came with S52b32US engines.

this saloon was a euro engine m3 and is corect on the numbers built
it was never sold in the US market same as the s50 convertable was never sold in US and is low build numbers which i own one and looked into with bmw
you will find most of the rhd ones will be here in the UK try some of the M3 sites in UK if your looking for info on it
i see your hong kong so there is a chance it was built to UK spec and then sold to Hong Kong so engine should be same as any s50 in the UK

Euro spec m3 cars were available for sale in most of Asia as it was in most of the world.. Sans North America.