I've done B7 RS4 brakes on a D2. Thats easy as they are radial mount calipers the same as the D2 Brembos so the adapter is a 10mm thick flat plate with 4 holes in it. I would expect they fit in some 18s as thats what the B7 had stock, although the RS6 had 19s.
The 18z will fit over a 365mm disc no problem - it just needs a litle grinding at the outer edges. But, the mounting lugs then occupy the same place in space as the lugs on the upright so you can't even put the caliper on the disc, let alone contrive an adapter. I'll get a pic tomorrow - its a vexing problem since those calipers are cheap and easily available.
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13th July 2020, 10:24 PM
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