I am running a ACT Heavy Duty PP on an S14 with an S13 blacktop SR.
Original master cylinder, damper loop delete, stainless steel from hardline to slave, NEW OEM slave.
Works fine, no problem.
As a matter of fact, there is NO preload on the MC (bc there is a TINY bit of play at the top).....and I only need to press the clutch pedal down about 1-2 inches for the clutch to disengage.
Working quite efficiently if you ask me.
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Daily driven
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