Definately CSC
Zspeed makes a much more durable (not plastic) replacement. If your dealer will replace with a non OEM part (ie do the labor under warrenty) I would order one and see if they might install. (put in braided clutch line while your at it)
The Zspeed CSC hasent seen any failures that I know of on this forum, every OEM csc eventually seems to fail. (at least it is very common to see here)
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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix
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