Bumping this old thread. I don't want to use my z brakes on my nx but would rather use the S14 stuff from my other car. The S14 caliper bolted to the b15 spindle fine. I tried the stock 240sx rotor and it looked like it cleared tI'll I bolted it down then it turns out it's too big. Anyone use stock 240sx calipers and what rotor? Maybe mine are abs rotors?