i weighed my s3 calipers and the original gti ones and they where the same weight, the s3 calipers are half aluminium and the gti ones are completely iron. the s3 discs are heavier though. i never noticed at all, appart from now my brakes are sh@t hot instead of plain sh@t.
do the cupra and r32 calipers have the weighted bobbin on them?