Im having the same problem with my newly installed spec stage 1 clutch. I have gone through two slave cylinders, and am having luck so far with the third one, when i put this one on, I adjusted clutch freeplay on the pedal by turning in the rod about .25".
Now clutch does not get hard at bottom of pedal I figured there was to much travel in master cylinder rod causing to great of pressure to be applied to slave therefore forcing seals to blow just like yours.
This third slave has lasted me about 2-3 weeks now and counting keeping my fingers crossed. Getting stranded on the road with a blown slave was getting old.
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