There's not really a pump upgrade option as far as I know, so I'm guessing the kits on the market are a good indication of what the stock pump can handle. Seems I have my answer.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed | |