and in case you were going to ask about the Z32 BM57.......... they work fine on the R33 /R34 calipers front and rear (4pot/2pot) will lock the fronts first everytime only problem is that the pressure the BM57 generates is enough to overcome the ABS and will still lock the tires in the dry at 100kph if you stand on the pedal... personally i think the 57 is they way to go but a 50 will work perfectly fine all the same