yes you are right
but "B" in "B4" does not mean Bilstein.
lol all legacy RS, RSB and RSK are B4
250T, TS, TS-R, Brightons etc. are not classified as B4
nah B4 does not stand for Bilstein.
i had a 99 subaru legacy B4 RS
Non-turbo ej204 it was rated at 220hp with dual AVCS
b4 badge had dark grey outline
but it didnt have bilstein suspension