What is the best slave cylinder? I recently installed a new clutch kit form Excedy in my 04 2.3 ZX5. I have replaced the slave cylinder 3 times. The first one that came in the kit was junk out of the box. Could not get all of the air out of it. Second one was a duralast from AZ. I usually don't use AZ slaves but I was in a bind. That started leaking. I then replaced that one with another one from AZ under warranty. That one made it about 60 miles. Leaked fluid all over 7 eleven parting lot.