v6matt

are escort xr3i cams and rst ones the same and do the s1 and s2 differ in anyway im on about std items cheers

Rick

same

v6matt

sorry m8 what are the same the s1 and 2 or the xr and rs cheers

G2RSR

All mfi ones are the same s1 s2 xr

SafeChav

All MFI cams are the same, EFI cams are the same aswell but slightly re-profiled over MFI cams, all are interchangable

JesseT

Ford state two things in their workshop manuals. First, the S1 uses the same cam as the mk3 XR3i, only timed differently with a different cam pulley. Secondly, the mk3 and mk4 XR3i cams are different. So, I would assume that S1 and S2 cams are different too.
Also a fact is that most cvh versions had different cams to each other, but as a replacement part, by Ford or others, same is offered for most. This makes people think that they originally came with identical cams too.