Hydraulic Clutch Master Cylinder.

FYI: if you get the kit, you don't need to attach the push rod to the stock location on the clutch pedal. I simply mocked it up and came straight in from the firewall to the clutch pedal, made a mark, took the pedal out and drilled my new attaching point. Some people seem to think you absolutely have to attach it to the stock location, I called American Power Train and talked to a tech. He said as long as the rod is straight in and out of the master cylinder your good.