Definitely the master if you have the ZSpeed HDCSC. Especially if you did not do the master when you did the CSC. The part is ~$125 and shouldn't take more than an hour to install.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
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