Ok ill get straight to the point we have had to replace the clutch master cylinder twice aready because the seals went out and would not build pressure, we will replace the master cylinder with a new oem s13 one from autozone and it does good for almost a month then out of no where it loses pressure. we remove the clutch master cylinder and its just like seals are gone out on the inside the shaft is real loose and moves side to side and wont build pressure. I was wondering the swap is running the stock skyline slave cylinder with the s13 line connected in to it could it just be to much for the oem s13 clutch master cylinder is so what could we do to fix this problem? we do have life time warranties on the clutch master cylinder its just irritating have to replace so much. And everything is stock.