FYI - The 3.0Si calipers, and the ones from the 2.5Si and 3.0SE are the same, in fact that rear caliper is also used on pretty much every E46 from the 316 to the 328i according to RealOEM..
Hi Simon, whats your plans for the calipers that you currently have on your zed once you have refurbed these others? I have been looking for some calipers to refurb myself but the fronts dont seem to come up much on ebay