if i look at the ATE homepage, they should be the same, diameter 20,64mm. But the one i have in the chevette looks very different, maybe from an other manufactorer ?
i have the chevette mastercylinder, discs, calipers and drums from the Kadett GT/E and the feeling on the brake pedal is very weak.
i have read other thread with the same problem, is this a sympton of old age of the mastercylinder or do i have to change to the kadett part?

