This past summer I had the JWT heavy duty clutch kit installed in my '08 G35S. I replaced the slave cylinder at the same time, but went with the OEM version. Now it looks like that OEM slave cylinder has failed. My bad for not catching that in one of the threads here, because the failure seems to be fairly common with some aftermarket pressure plates.

I have only found 2 options thus far. Either the ZSP2006 (from Concept Z Performance), or the Centric 303.42001. The Z Speed part looks great, but if you are purchasing it for the first time, you have to go for the $325 option, because some cables are required for the install.

The Centric slave cylinder, on the other hand, is about $140.

Does anyone have any experience with the Centric slave cylinder, coupled with an aftermarket clutch pressure plate?

I did run some searches here, but only found someone using it with an '06, and I think the slave cylinder was still external to the transmission housing back then, thus a different part.

 

I stopped by the repair shop this morning to check out the transmission, and sure enough the clutch slave cylinder I just had installed back in June 2014 is leaking. I bought the part from Concept Z Parts. It is sold as "Infiniti OEM G35 / G37 Concentric Slave Cylinder 07+ Sedan, 08+ Coupe", SKU: 306A1-JK40D, but it is labeled "Valeo" on the slave cylinder and the clutch lines. Figured it would be a "Nissan" part.



My wife helped me see the folly of going with another 'budget' option, so I ordered the Z Speed slave cylinder from Concept Z Parts. It's such an expensive part, but if I bought another lower cost (and presumably lower quality) part, then the end result could be another expensive trip to the repair shop.