I went to recondition a spare pair of twin piston sumitomo calipers this arvo that I've had lying around for years, always assumed they were 240K. However, these are a little different to the "K" ones already on my car (mine are the same as the ones in the pic, and aren't on a zed).
The spare ones don't have the large boss in the centre of the main body for the hydraulic line to attach to, this area is flat. The line attaches in the same spot that the bleeder valve attaches (obviously on the other end of the caliper) - pretty much where I've put a circle in the photo attached.
Are these zed calipers ? Are zed ones different to 240K ? Are parts the same for both ?
Just looking to rebuild them as track day spares / cupboard ornaments.