What are the stock turbos on a 335i?

I tried searching but came up mostly with a lot of FS/WTB threads (and also a lot of threads about Rob Beck Turbos for some reason). The only info I found was that the stock turbos have td03 housings, so I know they're Mitsubishi, but beyond that I couldn't find anymore info. Does anyone know?



Also can anyone tell me what the RB turbos are (the search results got me curious)? I remember that name from my 3000GT days.