I thought that the early 2.8 had a clutch too (and have been told so) but the one on my 1998 is definitely a torsen, no clutches - we opened it up for a look.Any difference I the type of differential? I know the non Ms come with a clutch type diff for pre facelift and torsen for the facelift is it the same for the Ms S50 vs S54?
All M’s had the clutch type as @Lee will tell you - had that on his early s50.